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Cecidomyiidae (Diptera) on Myrtaceae in Brazil: richness and geographic distribution

Abstract

Myrtaceae have a wide geographical distribution in Brazil and host a great richness of Cecidomyiidae galls. However, the number of cecidomyiid species on them has not yet been established and the knowledge of their geographic distribution is deficient. We provide the first list of cecidomyiid species on Myrtaceae and analyze their distribution in Brazilian biomes. A literature review was performed and new data were obtained from herbarium specimens of the Jardim Botânico do Rio de Janeiro. In Brazil, 13 species of Myrtaceae of five genera shelter described species of gall midges. Eugenia hosts the greatest richness of gall-inducers. All plant species have human uses and are native to Brazil, being seven endemic. Myrtaceae shelter 25 cecidomyiid species of 13 genera in 25 gall morphotypes. Sixteen species occur on endemic hosts, highlighting the peculiarity of the Brazilian fauna. These Cecidomyiidae occur collectively in five biomes, but most species (92%) are known from the Atlantic Forest, where 72% appear exclusively. Sixty per cent are restricted to a single Brazilian state, indicating their still poorly known distribution.

Key words
Galls; host plant; endemism; Atlantic Forest

INTRODUCTION

Cecidomyiidae is a cosmopolitan and very diverse family of Diptera, with more than 6,500 described species, with about 600 species recorded in Neotropic countries (Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital.). This family is known for inducing galls on plants, due to this habit these insects are commonly known as gall midges. Nevertheless, the family includes also fungivorous, predaceous, cecidophagous and free living species, but the habit of inducing galls is predominant. The gall-inducing species are usually monophagous and each species induces a gall of unique morphology and histology on its host plant (Shorthouse et al. 2005SHORTHOUSE JD, WOOL D & RAMAN A. 2005. Gall-inducing insect – Nature´s most sophisticated herbivores. Basic Applied Ecol 6: 407-411. https://doi:10.1016/j.baae.2005.07.001.). For this reason, the gall is considered the extended phenotype of the species and its presence on a specific plant indicates the presence of the gall-inducing species (Stone & Schönrogge 2003STONE GN & SCHÖNROGG K. 2003. The adaptive significance of insect gall morphology. Trends Ecol Evol 18: 512-522., Carneiro et al. 2009CARNEIRO MA, BRANCO CSA, BRAGA CED & ALMADA ED. 2009. Are gall midge species (Diptera, Cecidomyiidae) host plant specialists? Rev Bras Entomol 53: 365-378.).

Myrtaceae are one of the largest families of eudicotyledons, comprising 5,700 species in 130 genera worldwide (Rosa & Romero 2012ROSA PO & ROMERO R. 2012. O gênero Myrcia (Myrtaceae) nos campos rupestres de Minas Gerais, Brasil. Rodriguesia 63: 613-633.). Among them, 1,026 species in 27 genera are recorded in Brazil (Flora e Funga do Brasil 2020FLORA E FUNGA DO BRASIL. 2020. Jardim Botânico do Rio de Janeiro. Disponível em: < http://floradobrasil.jbrj.gov.br/ >. Accessed on: 14 April 2020.
http://floradobrasil.jbrj.gov.br/ ...
). The family has a wide geographical distribution in the country, occurring from the north to the south, in all phytogeographic domains (Flora e Funga do Brasil 2020). Several Brazilian inventories recorded a great richness of insect galls on Myrtaceae (Maia 2019MAIA VC. 2019. Insect Galls on Myrtaceae: Richness and Distribution in Brazilian Restingas. Biota Neotrop 19: e20180526.). This family is the second most frequent in these publications. Furthermore, Myrtaceae were pointed out as super host in 49% of them (Araújo et al. 2019ARAÚJO WS, FERNANDES GW & SANTOS JC. 2019. An overview of inventories of gall-inducing insects in Brazil: looking for patterns and identifying knowledge gaps. An Acad Bras Cienc 91: e20180162.). This family also include many useful and/or ecological important plants (Lorenzi et al. 2006LORENZI H, BACHER L, LACERDA M & SARTORI S. 2006. Frutas Brasileiras e Exóticas Cultivadas. Instituto Plantarum de Estudo da Flora, Nova Odessa, 650 p., Morais et al. 2014MORAIS LMF, CONCEIÇÃO GM & NASCIMENTO JM. 2014. Família Myrtaceae: análise morfológica e distribuição geográfica de uma coleção botânica. Agrar Acad 1: 317-346.). Many species have been investigated for their medicinal properties. These uses add economic value to plant species and cecidomyiids that induce galls on them. Nevertheless, the number of gall midge species on Myrtaceae has not yet been established and the knowledge about their geographic distribution is deficient, since most species have been recorded in few localities. The main goals of this study are to provide a list of cecidomyiid species on Myrtaceae in Brazil, to update their geographic distribution and to add new records of sample localities in order to fill this knowledge gap.

MATERIALS AND METHODS

First, we have listed all gall midge species on Myrtaceae in Brazil. Data was preliminarily retrieved from the last version of the world catalog of Cecidomyiidae written by Gagné & Jaschhof (2017)GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital.. Then, all original descriptions were examined in order to obtain data on galls, host plants, and type-localities. The next step was to look for the synonyms of the plant species, to check their correct spelling, to verify their origin and distribution in Brazil based on “Flora e Funga do Brasil ” site. After that, we consulted all insect gall inventories in Brazilian areas which were published from 1988 to 2019 in order to obtain records of Cecidomyiidae galls on Myrtaceae.

Subsequently, we visited the herbarium of the Jardim Botânico do Rio de Janeiro (RB) in a search for galled host plant exsiccates, which were photographed whenever galls were observed. Data on their labels were checked and new records were established by comparison with those from literature. The updated distribution of gall midge species was compared with that of host plants. Finally, the economic importance of each plant species was verified in the literature.

Cecidomyiid species were listed in alphabetical order after general results. Gall morphological characterization, geographic distribution, data on host plants (origin and distribution), and references were also provided, the last in chronological order. Localities were presented from North to South and biomes in brackets. Countries were written in capitals letters. The following abbreviations for Brazilian states were adopted: North Region: AC=Acre, AM=Amazonas, AP=Amapá, PA=Pará, RR=Roraima, and RO=Rondônia, and TO=Tocantins; Northeast Region: RN=Rio Grande do Norte, PB=Paraíba, PE=Pernambuco, AL=Alagoas, SE=Sergipe, and BA=Bahia; Midwest Region: MT=Mato Grosso, DF=Distrito Federal, GO=Goiás, and MS=Mato Grosso do Sul, Southeast Region: MG=Minas Gerais, ES=Espírito Santo, RJ=Rio de Janeiro, and SP=São Paulo, and South Region: PR=Paraná, SC=Santa Catarina, and RS=Rio Grande do Sul. New records were indicated by an asterisk followed by the herbarium acronym and number of plant voucher. To avoid repetition, data on plant species synonyms, distribution and origin were presented only when the host is cited for the first time.

RESULTS

Myrtaceae shelter 25 gall midge species which were reported from 25 gall morphotypes on 13 host plant species of five genera (Table I), namely: Eugenia L. (five host species), Eugenia astringens Cambess., E. copacabanensis Kiaersk., E. hiemalis Cambess., E. punicifolia (Kunth.) DC., and E. uniflora L.; Myrcia DC with three, M. amazonica DC., M. ovata Cambess., and M. retorta Cambess.; Myrciaria O. Berg. with three too, M. delicatula (DC.) O. Berg., M. floribunda (West ex Willd.) Berg., M. tenella (DC.) O. Berg., Neomitranthes Kausel ex D. Legrand and Psidium L., the last two with a single host species, N. obscura (DC.) N. Silveira, and P. cattleyanum Sabine, respectively. Eugenia hosted the greatest richness of gall midge species (14), while the others sheltered two to four species.

Table I
Myrtaceae: host species, origin and richness of gall midges (Diptera, Cecidomyiidae) in Brazil.

Seven plant species (53.8%) hosted a single gall midge species: Eugenia hiemalis, E. punicifolia, Myrcia amazonica, M. ovata, M. retorta, Myrciaria delicatula, and M. tenella, while six sheltered more than one, Eugenia astringens (four species), E. copacabanensis (three), E. uniflora (four), Myrciaria floribunda (two), Neomitranthes obscura (three), and Psidium cattleyanum (two). All plants are native to Brazil, seven of them are endemic to the country. Among the last, five are endemic of the Atlantic Forest (Table I). The endemic plants host 16 gall midge species (65%).

Gall midges on Myrtaceae have been collectively recorded in five Brazilian biomes. However, the great majority (92%) are known from a single biome, except Dasineura myrciariae Maia, 1995 and Stephomyia epeugeniae Gagné, 1994. The former occurs in four biomes, Amazon Forest, Atlantic Forest, Caatinga, and Cerrado, while the later in two Atlantic Forest plus Cerrado. Twenty-three species (92%) have been reported in the Atlantic Forest, 19 exclusively (72%) (Table II). Among the last, ten (about 40%) occurred on hosts endemic to the Atlantic Forest.

Table II
Gall midges (Diptera: Cecidomyiidae) on Myrtaceae and their host plants: distribution in Brazilian biomes. 0=absence, 1=only host plant, 2=host plant and gall midge, 3=only gall midge.

New locality records of five gall midge species are reported. Dasineura globosa Maia, 1995 and D. marginalis Maia, 1995, previously restricted to Rio de Janeiro state, have their area of distribution widened to Espírito Santo and Bahia. Neolasioptera eugeniae Maia, 1993a, reported only in Minas Gerais and Rio de Janeiro, is recorded for the first time in Paraguay, Dasineura myrciariae, known from Espírito Santo and Rio de Janeiro, has its distribution greatly widened, including other 13 Brazilian states and also the British Guiana, and finally Neomitranthella robusta Maia, 1994 is reported for the first time in the municipality of Rio de Janeiro.

From the total of 25 cecidomyiid species, 15 species (60%) are restricted to a single Brazilian state (Rio de Janeiro: 11, Minas Gerais: 2 and Rio Grande do Sul: 2), while eight occur in two or three Brazilian states, while Neolasioptera eugeniae occurs in Paraguay, Minas Gerais, and Rio de Janeiro, and Dasineura myrciariae exhibits the widest distribution, with records in all Brazilian regions, from North to South.

Concerning herbarium data, 1,628 exsiccates were examined, 136 of them showed Cecidomyiidae galls: Eugenia astringens (N=36), E. copacabanensis (N=1), E. uniflora (N=11), Myrciaria floribunda (N=78), and Neomitranthes obscura (N=10). Among them, Myrciaria floribunda and Eugenia astringens exhibited the highest number of galled exsiccates.

Galls of eight gall midge species were found, Dasineura globosa Maia, 2005, D. marginalis Maia, 2005, and Stephomyia rotundifoliorum Maia, 1993b on Eugenia astringens, Clinodiplosis profusa Maia, 2001a and Neolasioptera eugeniae on E. uniflora, Dasineura copacabanensis Maia, 1993a on E. copacabanensis, Dasineura myrciariae on Myrciaria floribunda, and Neomitranthella robusta on Neomitranthes obscura.

We found galls in exsiccates of Myrcia amazonica (Fig. 1) and Myrciara tenella (Fig. 2) too. Nevertheless, their inducers have not yet been determined. Furthermore, exsiccates of M. retorta and Myrciaria delicatula were examined, but they showed no galls.

Figures 1-6
Galls on Myrtaceae and maps of distribution in Brazil. 1. On Myrcia amazonica DC. (undetermined galler), 2. On Myrciara tenella (DC.) O. Berg. (undetermined galler), 3. Galls of Brethesiamyia myrciae Maia, 2010 on Myrcia retorta Cambess., 4. Map of distribution of B. myrciae Maia, 2010 and M. retorta, 5. Galls of Clinodiplosis profusa Maia, 2001a on Eugenia uniflora L. 6. Map of distribution of C. profusa and E. uniflora. Colorful areas indicate the host plant distribution: Orange – states of Northeast Region, Red – states of Southeast Region, Yellow – states of Midwest Region, Blue – states of South Region. Black circles indicate the gall midge distribution.

List of Cecidomyiidae species on Myrtaceae:

1) Anasphondylia myrtacea Tavares, 1920

Gall: on leaf, globoid, glabrous, and three-chambered (figure 324, p. 275 in Gagné 1994GAGNÉ RJ. 1994. The Gall Midges of the Neotropical Region, 1st ed., Ithaca: Cornell University Press, 352 p..). Geographic distribution: BRAZIL: RJ: Nova Friburgo (Atlantic Forest). Host plant: undetermined Myrtaceae. References: Tavares 1920TAVARES JS. 1920. [continuation of:] Cecidologia brazileira: cecidias que se criam em plantas das famílias das Leguminosae, Sapotaceae, Lauraceae, Myrtaceae, Punicaceae, Aurantiaceae, Malpighiaceae, Sapindaceae, Umbelliferae, Loranthaceae, Apocynaceae, Urticaceae, Salicaceae e Gramineae. Broteria Ser Zool 18: 97-125I., Gagné 1994GAGNÉ RJ. 1994. The Gall Midges of the Neotropical Region, 1st ed., Ithaca: Cornell University Press, 352 p., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

2) Brethesiamyia myrciae Maia, 2010

Gall: on leaf, conical, yellow, glabrous, and one-chambered (Fig. 3). Geographic distribution: BRAZIL: MG: Belo Horizonte (Cerrado), Três Marias (Cerrado). Host plant: Myrcia retorta (endemic to Brazil). Plant distribution: MG, SP, PR, SC, RS (Atlantic Forest, Cerrado) (Fig. 4). References: Maia et al. 2009MAIA VC, FERNANDES GW & NEGREIROS D. 2009. A new genus and species of gall midge (Diptera, Cecidomyiidae) associated with Myrcia retorta (Myrtaceae). Rev Bras Entomol 53: 38-40., Maia 2010MAIA VC. 2010. A new replacement name for Brethesia (Diptera, Cecidomyiidae). Rev Bras Entomol 54: 146., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

3) Clinodiplosis profusa Maia, 2001a

Gall: on leaf, conical, green or red, glabrous, and one-chambered (Fig. 5). Geographic distribution: BRAZIL: RJ: São João da Barra, Carapebus, Arraial do Cabo, Cabo Frio, Araruama, Saquarema, Maricá, Rio de Janeiro, Mangaratiba (Ilha de Marambaia) (Atlantic Forest), Paraty; RS (unstated locality). Host plant: Eugenia uniflora (native to Brazil). Plant distribution: BA, MG, ES, RJ, SP, MS, PR, SC, RS (Atlantic Forest, Cerrado, Pampa) (Fig. 6). References: Monteiro et al. 1994MONTEIRO RF, FERRAZ FFF, MAIA VC & AZEVEDO MAP. 1994. Galhas entomógenas em restingas: uma abordagem preliminar. In Anais do ACIESP 3: 210-220., Maia 2001aMAIA VC. 2001a. New genera and species of gall midges (Diptera, Cecidomyiidae) from three restingas of Rio de Janeiro State, Brazil. Rev Bras Zool 18: 1-32., b, 2013MAIA VC. 2013. Galhas de insetos em restingas da região sudeste do Brasil com novos registros. Biota Neotrop 13: 183-209. http://www.biotaneotropica.org.br/v13n1/pt/abstract?inventory+bn01613012013., Oliveira & Maia 2005OLIVEIRA JC & MAIA VC. 2005. Ocorrência e caracterização de galhas de insetos na restinga de Grumari (Rio de Janeiro, RJ, Brasil). Arch Mus Nac 63: 669-676., Silva & Rodrigues 2011SILVA LO & RODRIGUES AR. 2011. Galhas de inseto do Parque Municipal da Boca da Barra, Cabo Frio (RJ). In: Livro de resumos do X Congresso de Ecologia do Brasil. Sociedade de Ecologia do Brasil (SEB), Universidade de São Paulo. São Paulo. http://seb-ecologia.org.br/revistas/indexar/anais/xceb/resumos/449.pdf.
http://seb-ecologia.org.br/revistas/inde...
, Rodrigues et al. 2014Rodrigues AR, Maia VC & Couri MS. 2014. Insect galls of restinga areas of Ilha da Marambaia, Rio de Janeiro, Brazil. Rev Bras Entomol 58: 173-197., Carvalho-Fernandes et al. 2016CARVALHO-FERNANDES SP, ASCENDINO S, MAIA VC & COURI MS. 2016. Diversity of insect galls associated with coastal shrub vegetation in Rio de Janeiro, Brazil. An Acad Bras Cienc 88: 1407-1418., Maia & Silva 2016MAIA VC & SILVA LO. 2016. Insect galls of restinga de Marambaia (Barra de Guaratiba, Rio de Janeiro, RJ). Braz J Biol 73: 787-795., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital., Goetz et al. 2018GOETZ APM, LUZ FA, TOMA TSP & MENDONÇA JR MS. 2018. Gall-inducing insects of deciduous and semideciduous forests in Rio Grande do Sul State, Brazil. Iheringia Ser Zool 108: e2018015..

4) Dasineura copacabanensis Maia, 1993a

Gall: on bud, conical, green, glabrous, and one-chambered (Fig. 7). Geographic distribution: BRAZIL: RJ: São João da Barra, Arraial do Cabo, Cabo Frio, Araruama, Maricá, Saquarema (Atlantic Forest). Host plant: Eugenia copacabanensis (endemic to Atlantic Forest). Plant distribution: ES, RJ, SP, PR (Fig. 8). References: Maia 1993aMAIA VC. 1993a. Descrição de duas espécies novas de Cecidomyiidae (Diptera) associadas a Eugenia spp. (Myrtaceae). Rev Bras Entomol 37: 717-721., Carvalho-Fernandes et al. 2016CARVALHO-FERNANDES SP, ASCENDINO S, MAIA VC & COURI MS. 2016. Diversity of insect galls associated with coastal shrub vegetation in Rio de Janeiro, Brazil. An Acad Bras Cienc 88: 1407-1418., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

Figures 7-13
Cecidomyiidae (Diptera) galls on Myrtaceae and maps of distribution in Brazil. 7. Galls of Dasineura copacabanensis Maia, 1993a on Eugenia copacabanensis Kiaersk., 8. Map of distribution of D. copacabanensis, Stephomyia espiralis Maia, 1993b, S. tetralobae Maia, 1993b and E. copacabanensis, 9. Gall of Dasineura gigantea Angelo & Maia, 1999 on Psidium cattleyanum Sabine, 10. Map of distribution of D. gigantea and P. cattleyanum, 11. Galls of Dasineura globosa Maia, 1995 on Eugenia astringens Cambess., 12. Map of distribution of D. globosa, Dasineura marginalis Maia, 2005 and E. astringens, 13. Galls of Dasineura marginalis. Orange – states of Northeast Region, Red – states of Southeast Region, Blue – states of South Region. Black circles indicate the gall midge distribution.

5) Dasineura gigantea Angelo & Maia, 1999MAIA VC. 1999. Descrição de imaturos de quatro espécies de Asphondyliini neotropicais e nota taxonômica sobre Asphondylia maytenuse Maia & Couri (Diptera, Cecidomyiidae). Rev Bras Zool 16: 775-778.

Gall: on bud, rosette, green, glabrous, and multichambered (Fig. 9). Geographic distribution: BRAZIL: SP: Bertioga (Atlantic Forest); PR: Piraquara (Atlantic Forest); SC (unstated locality). Host plant: Psidium cattleyanum (endemic to Brazil). Plant distribution: CE, PE, SE, BA, MG, ES, RJ, SP, PR, SC, RS (Atlantic Forest, Caatinga, Cerrado) (Fig. 10). References: Angelo & Maia 1999ANGELO AC & MAIA VC. 1999. Dasineura gigantea sp. n. (Diptera, Cecidomyiidae) associada a Psidium cattleianum Sabine (Myrtaceae) no Brasil. Rev Bras Zool 16: 191-195., Maia et al. 2008MAIA VC, MAGENTA MAG & MARTINS SE. 2008. Ocorrência e caracterização de galhas de insetos em áreas de restinga de Bertioga (São Paulo, Brasil). Biota Neotrop 8: 167-197. <http://www.biotaneotropica.org.br/v8n1/pt/abstract?inventory+bn02408012008> (last access on 17/March/2020)., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital., Melo-Júnior et al. 2015MELO-JÚNIOR JCF, ISAIAS RMS, BOEGER MRT, ARRIOLA IA & MATILDE-SILVA M. 2015. Diversidade de galhadores nas restingas do ecossistema Babitonga, Santa Catarina, Brasil. Revista CEPSUL 7: eb2018003..

6) Dasineura globosa Maia, 1995

Gall: on leaf, globoid, yellow or green, glabrous, and one-chambered (Fig. 11). Geographic distribution: BRAZIL: BA*: Conde (Ferreira, M.G.: 698, RB368876), Mata de São João (Soeiro, R.: 220, RB373825) (Atlantic Forest); ES*: Aracruz (Pereira, O. J., RB373253) (Atlantic Forest); RJ: São João da Barra, Carapebus, Macaé* (Araújo, G. U. C.: 09, RB430334), Arraial do Cabo, Cabo Frio, Araruama, Saquarema, Maricá, Niterói, Rio de Janeiro, Mangaratiba (Ilha de Marambaia), Angra dos Reis (Ilha Grande) (Atlantic Forest). Host plant: Eugenia astringens (synonyms: E. rotundifolia Casar, E. umbellifora O. Berg.) (endemic to Atlantic Forest). Plant distribution: BA, ES, RJ, SP, PR, SC (Fig. 12). References: Maia 1996aMAIA VC. 1996a. Três espécies novas de Dasineura Rondani (Diptera, Cecidomyiidae) associadas a Myrtaceae, na restinga de Barra de Maricá, Rio de Janeiro. Rev Bras Zool 12: 1001-1008., 2001b, Oliveira & Maia 2005OLIVEIRA JC & MAIA VC. 2005. Ocorrência e caracterização de galhas de insetos na restinga de Grumari (Rio de Janeiro, RJ, Brasil). Arch Mus Nac 63: 669-676., Maia & Barros 2009MAIA VC & BARROS GPS. 2009. Espécies de Cecidomyiidae (Diptera) Registradas no Estado do Rio de Janeiro, Brasil. Arch Mus Nac 67: 211-220., Rodrigues et al. 2014Rodrigues AR, Maia VC & Couri MS. 2014. Insect galls of restinga areas of Ilha da Marambaia, Rio de Janeiro, Brazil. Rev Bras Entomol 58: 173-197., Carvalho-Fernandes et al. 2016CARVALHO-FERNANDES SP, ASCENDINO S, MAIA VC & COURI MS. 2016. Diversity of insect galls associated with coastal shrub vegetation in Rio de Janeiro, Brazil. An Acad Bras Cienc 88: 1407-1418., Maia & Silva 2016MAIA VC & SILVA LO. 2016. Insect galls of restinga de Marambaia (Barra de Guaratiba, Rio de Janeiro, RJ). Braz J Biol 73: 787-795., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

7) Dasineura marginalis Maia, 2005

Gall: marginal leaf roll, green, glabrous, and one-chambered (Fig. 13). Geographic distribution: BRAZIL: BA*: Conde (Ferreira, M. C.: 698, RB368876), Jandaíra (Jost, T.: 650, RB471344), Salvador (Campos, G. L.: 14, RB419517) (Atlantic Forest); ES*: Conceição da Barra (Giaretta, A.: 1208, RB561360), São Mateus (Oliveira, A. G.: 12, RB562864), Guarapari (Rosa, L.V.: 112, RB356421) (Atlantic Forest); RJ: Carapebus, Macaé* (Araújo, G.U.C: 08, RB430339, Araújo, G.U.C: 09, RB 430334), Arraial do Cabo, Cabo Frio, Araruama, Saquarema, Maricá, Rio de Janeiro, Mangaratiba (Ilha de Marambaia), Angra dos Reis* (Ilha Grande) (Scheel-Ybert, R.: 398, RB413960) (Atlantic Forest) (Fig. 12). Host plant: E. astringens. References: Maia 2001bMAIA VC. 2001b. The gall midges (Diptera, Cecidomyiidae) from three restingas of Rio de Janeiro State, Brazil. Rev Bras Zool 18: 305-656., Maia et al. 2005MAIA VC, CONSTANTINO PAL & MONTEIRO RF. 2005. New gall midges (Diptera, Cecidomyiidae) associated with two species of Eugenia (Myrtaceae). Rev Bras Entomol 49: 347-352., Rodrigues et al. 2014Rodrigues AR, Maia VC & Couri MS. 2014. Insect galls of restinga areas of Ilha da Marambaia, Rio de Janeiro, Brazil. Rev Bras Entomol 58: 173-197., Carvalho-Fernandes et al. 2016CARVALHO-FERNANDES SP, ASCENDINO S, MAIA VC & COURI MS. 2016. Diversity of insect galls associated with coastal shrub vegetation in Rio de Janeiro, Brazil. An Acad Bras Cienc 88: 1407-1418., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

8) Dasineura myrciariae Maia, 1995

Gall: marginal leaf roll, green, glabrous, and one-chambered (Fig. 14). Geographic distribution: BRITISH GUIANA* (Forest Department British Guiana, RB88137), BRAZIL: AC*: Acrelândia (Daly, D. C.: 13699, RB491576) (Amazon Forest); PA*: Oriximiná (Martinelli, G.: 7266, RB202944) (Amazon Forest); MT*: Diamantino (Santos, M. F.: 377, RB488952) (Amazon Forest, Cerrado), Paranaíta (Maioli, V.: 762, RB474579) (Amazon Forest); GO*: Serra Dourada (Rizzo, A.: 4290, RB144353) (Cerrado); PE*: Araripina (Barreto, R.: 546, Serra do Araripe) (RB356700), Águas Belas (Andrade Lima, A. D. de: 69, RB374818) (Caatinga); AL*: Piaçabuçu (Lyra-Lemos, R. P.: 1900, RB374273) (Atlantic Forest); SE*: Barra dos Coqueiros (Farney, C.: 2885, RB374138), Estância (Mattos Silva, L. A.: 3012, RB374020), Pirambú (Reserva Biológica de Santa Isabel) (Farney, C.: 2942, RB295281), Santa Luzia de Itanhy (Deda, R. M.: 81: RB575815) (Atlantic Forest); BA*: Campo Formoso (Fonseca, W. N. da: 372, RB208424) (Caatinga), Conde (Ferreira, M. C.: 902, RB388876) (Atlantic Forest), Esplanada (Ribeiro, T.:12, RB397959) (Atlantic Forest), Caetité (Mendes, M. S.: 529, RB564662) (Caatinga), Morro do Chapéu (Forzza, R. C.: 1393, RB397779) (Caatinga), Salvador (Lobão, A. Q.: 320, RB322167) (Atlantic Forest), Tucano (Sant’Ana, S. C. de: 523, RB373829) (Caatinga); MG*: Diamantina (Pirani, J. R.: 5812, RB566167) (Cerrado), Buritís (Pereira, B. A.: 3230, RB390225) (Cerrado), Brumadinho (Oliveira, J. G.: 650, RB549948) (Atlantic Forest), Ouro Preto (Peron, M.: 205, RB276291) (Atlantic Forest), Teófilo Otoni (de Paula, L. F. A.: 583, RB586515) (Atlantic Forest); ES: Conceição da Barra* (Pereira, O. J.: 2964, RB423518, Giaretta, A.: 1193, RB561400), São Mateus* (Giaretta, A.: 1363, RB561401), Barra do Jucu* (Weinberg, B.: 81, RB262635), Guarapari, Linhares* (Folli, D. A.: 3887, RB439930, Nic Lughadha, E. M.: 185, RB377618, Silva, I. A.: 317, RB413042), Santa Teresa, Vitória* (Martins, M. L. L.: 208, RB374368) (Atlantic Forest); RJ: Carapebus, Macaé* (Araújo, D. S. D.: 7595, RB254732), Cabo Frio, Guapimirim* (Peroni, M.: 937, RB316229), Saquarema* (Ferreira, C. D. M.: 392, RB665796, Farney, C.: 3993, RB393512), Maricá, Niterói* (Parque Estadual da Serra da Tiririca) (Barros, A. A. M.: 2795, RB569359, Barros, A. A. M.: 2811, RB554805), Rio de Janeiro (Barra da Tijuca* Lima, H. C. de: 5494, RB328004 and RB328004, Grumari, Pedra de Itaúna* Araújo, D. S. D.: 170, RB145765, Restinga de Marambaia Dias, M. M.: 118, RB415726), Petropólis* (Sucre, D.: 10610RB166413), Teresópolis* (Occhioni, P.: 5709, RB275236), Parque Nacional de Itatiaia* (Landrum, L. R.: 2088, RB268687), Paraty* (Marquette, R.: 962, RB307210) (Atlantic Forest); SP*: Reserva Florestal da Bocaina (Sucre, D. C.: 3024, RB138979), Araraquara (Hoehne, W.: 3810, RB275419) (Cerrado-Atlantic Forest transition), Campos do Jordão (Rubens: 260, RB206260), Jundiaí (Arzolla, F. A. R. D. P.: 335, RB405453), Mogi das Cruzes (Kuhlmann, M.: 1984, RB368879), São Paulo (Brade, A. C.: 18756, RB58940) (Atlantic Forest); PR*: Irati (Mattos, A.: 63322, RB63322), São Mateus do Sul (Silva, M. S.: 811, RB255653) (Atlantic Forest); SC*: Florianópolis (Klein, R. M.: 8163, RB547077) (Atlantic Forest). Host plant: Myrciaria floribunda (native to Brazil) (Amazon Forest, Atlantic Forest, Caatinga, Cerrado). Plant distribution: AC, AM, RR, RO, PE, AL, BA, GO, MT, MS, MG, ES, RJ, SP, SC, RS (Fig. 15). References: Maia 1996aMAIA VC. 1996a. Três espécies novas de Dasineura Rondani (Diptera, Cecidomyiidae) associadas a Myrtaceae, na restinga de Barra de Maricá, Rio de Janeiro. Rev Bras Zool 12: 1001-1008., Maia 2001bMAIA VC. 2001b. The gall midges (Diptera, Cecidomyiidae) from three restingas of Rio de Janeiro State, Brazil. Rev Bras Zool 18: 305-656., 2019, Bregonci et al. 2010Bregonci JM, POLYCARPO PV & MAIA VC. 2010. Galhas de insetos do Parque Estadual Paulo César Vinha (Guarapari, ES, Brasil). Biota Neotrop 10: 1-10. http://www.biotaneotropica.org.br/v10n1/pt/ abstract?inventory+bn01410012010., Maia et al. 2014MAIA VC, CARDOSO JLT & BRAGA JMA. 2014. Insect galls from Atlantic Forest areas of Santa Teresa, Espírito Santo, Brazil: characterization and occurrence. Bol Mus Biol Mello Leitão 33: 47-129., Maia & Carvalho-Fernandes 2016MAIA VC & CARVALHO-FERNANDES SP. 2016. Insect galls of a protected remnant of the Atlantic Forest tableland from Rio de Janeiro State (Brazil). Rev Bras Entomol 60: 40-56., Maia & Silva 2016MAIA VC & SILVA LO. 2016. Insect galls of restinga de Marambaia (Barra de Guaratiba, Rio de Janeiro, RJ). Braz J Biol 73: 787-795., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

Figures 14-19
Cecidomyiidae (Diptera) galls on Myrtaceae and maps of distribution in Brazil. 14. Galls of Dasineura myrciariae Maia, 1995 on Myrciaria floribunda (West ex Willd.) Berg., 15. Map of distribution of D. myrciariae and M. floribunda, 16. Galls of Dasineura tavaresi Maia, 1995 on Neomitranthes obscura (DC.) N. J. E. Silveira, 17. Map of distribution of D. tavaresi, Stephomyia mina, Maia, 1993b and N. obscura, 18. Galls of Elachypalpus psidii Maia & Nava, 2011 on Psidium cattyeanum Sabine, 19. Map of distribution of E. psidii and P. cattyeanum. Green – states of North Region, Orange- states of Northeast Region, Red – states of Southeast Region, Yellow – states of Midwest Region, Blue – states of South Region. Black circles indicate the gall midge distribution.

9) Dasineura tavaresis Maia, 1995

Gall: marginal leaf roll, green, glabrous, and one-chambered (Fig. 16). Geographic distribution: BRAZIL: ES: Guarapari (Atlantic Forest), RJ: Arraial do Cabo, Araruama, Cabo Frio, Carapebus, Maricá, Rio de Janeiro (Grumari), Saquarema (Atlantic Forest). Host plant: Neomithranthes obscura (DC.) N. Silveira (endemic to Atlantic Forest). Plant distribution: RN, PB, BA, ES, RJ, SP, PR, SC (Fig. 17). References: Maia 1996aMAIA VC. 1996a. Três espécies novas de Dasineura Rondani (Diptera, Cecidomyiidae) associadas a Myrtaceae, na restinga de Barra de Maricá, Rio de Janeiro. Rev Bras Zool 12: 1001-1008., 2001b, Carvalho-Fernandes et al. 2016CARVALHO-FERNANDES SP, ASCENDINO S, MAIA VC & COURI MS. 2016. Diversity of insect galls associated with coastal shrub vegetation in Rio de Janeiro, Brazil. An Acad Bras Cienc 88: 1407-1418., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

10) Elachypalpus psidii Maia & Nava, 2011

Gall: on leaf, cylindrical, green, glabrous, and one-chambered (Fig. 18). Geographic distribution: BRAZIL: RS: Pelotas (Pampa) (Fig. 19). Host plant: Psidium cattleyanum. References: Maia & Nava 2011MAIA VC & NAVA DE. 2011. New gall midges (Diptera, Cecidomyiidae) associated with Eugenia uniflora and Psidium cattleianum (Myrtaceae). Iheringia Ser Zool 101: 69-74., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

11) Eugeniamyia dispar Maia, Mendonça & Romanovski, 1996

Gall: on leaf, globoid, spongy, whitish, glabrous, and one-chambered (Fig. 20). Geographic distribution: BRAZIL: RJ: Rio de Janeiro, Niterói*, Maricá (Atlantic Forest); SP: Bertioga (Atlantic Forest), RS: Porto Alegre (Atlantic Forest), Pelotas (cultived area) (Fig. 21). Host plant: Eugenia uniflora. References: Maia et al. 1997MAIA VC, MENDONÇA JR MS & ROMANOWSKI HP. 1997. Eugeniamyia dispar gen. n. and sp. n. (Diptera, Cecidomyiidae, Lasiopteridi) associated with Eugenia uniflora L. (Myrtaceae) in Brazil. Rev Bras Zool 13: 1087-1090., 2008, Bierhals et al. 2012BIERHALS AN, NAVA DE, COSTA VA, MAIA VC & DIEZ-RODRÍGUEZ GI. 2012. Eugeniamyia dispar em pitangueira: parasitóides associados, dinâmica populacional e distribuição de galhas na planta. Rev Bras Frutic 34: 109-115., Mendonça Jr & Romanowski 2012MENDONÇA JR MS & ROMANOWSKI HP. 2012. Population ecology of the multivoltime Neotropical gall midge Eugeniamyia dispar (Diptera, Cecidomyiidae). Iheringia Ser Zool 102: 170-176., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital., Maia 2019MAIA VC. 2019. Insect Galls on Myrtaceae: Richness and Distribution in Brazilian Restingas. Biota Neotrop 19: e20180526..

Figures 20-25
Cecidomyiidae (Diptera) galls on Myrtaceae and maps of distribution in Brazil. 20. Galls of Eugeniamyia dispar Maia, Mendonça & Romanovski on Eugenia uniflora L., 21. Map of distribution of E. dispar and E. uniflora, 22. Galls of Eugeniamyia triangularis Maia & Nava, 2011 on Eugenia uniflora L., 23. Map of distribution of E. triangularis and E. uniflora, 24. Gall of Fernandesia meridionalis Rodrigues & Maia, 2013 on Myrciaria delicatula (DC.) O. Berg., 25. Map of distribution of F. meridionalis on M. delicatula. Orange – states of Northeast Region, Red – states of Southeast Region, Yellow – states of Midwest Region, Blue – states of South Region. Black circles indicate the gall midge distribution.

12) Eugeniamyia triangularis Maia & Nava, 2011

Gall: on leaf, conical, green, glabrous, and one-chambered (Fig. 22). Geographic distribution: BRAZIL: RJ: Maricá (Atlantic Forest) (Fig. 23) Host plant: E. uniflora. References: Maia & Nava 2011MAIA VC & NAVA DE. 2011. New gall midges (Diptera, Cecidomyiidae) associated with Eugenia uniflora and Psidium cattleianum (Myrtaceae). Iheringia Ser Zool 101: 69-74., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

13) Fernandesia meridionalis Rodrigues & Maia, 2013

Gall: on leaf, conical, pinkish, glabrous, and one-chambered (Fig. 24). Geographic distribution: BRAZIL: RS: São Francisco de Paula (Atlantic Forest). Host plant: Myrciaria delicatula (native to Brazil). Plant distribution: MS, MG, ES, RJ, SP, SC, RS (Atlantic Forest, Cerrado, Pampa) (Fig. 25). References: Rodrigues et al. 2013RODRIGUES AR, MAIA VC, WENZEL CR & MENDONÇA JR MS. 2013. A new genus and species of Lasiopteridi (Diptera, Cecidomyiidae) associated with Myrciaria delicatula (Myrtaceae) from Brazil, with identification keys of tribes and unplaced genera. Biota Neotrop 13: 63-69. http://www.biotaneotropica.org. br/v13n2/en/abstract?identification-key+bn02213022013. (last access on 17/March/2020)., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

14) Jorgenseniella eugeniae Maia, 2005

Gall: on leaf, lenticular, green, glabrous, and one-chambered (no fig.). Geographic distribution: BRAZIL: RJ: Arraial do Cabo (Atlantic Forest) (Fig. 26). Host plant: E. astringens. References: Maia et al. 2005MAIA VC, CONSTANTINO PAL & MONTEIRO RF. 2005. New gall midges (Diptera, Cecidomyiidae) associated with two species of Eugenia (Myrtaceae). Rev Bras Entomol 49: 347-352., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

Figures 26-31
Cecidomyiidae (Diptera) galls on Myrtaceae and maps of distribution in Brazil. 26. Map of distribution of Jorgenseniella eugeniae Maia, 2005, Stephomyia rotundifoliorum Maia, 1993b and Eugenia astringens Cambess., 27. Gall of Myrciamyia maricaensis Maia, 1995. 28. Map of distribution of M. maricaensis and Myrcia amazonica DC., 29. Map of distribution of M. maricaensis and Myrcia ovata Cambess., 30. Galls of Myrciariamyia bivalva Maia, 1994 on Myrciaria floribunda (West ex Willdenaw) Berg., 31. Map of distribution of M. bivalva and M. floribunda. Green – states of North Region, Orange – states of Northeast Region, Red – states of Southeast Region, Yellow – states of Midwest Region, Blue – states of South Region. Black circles indicate the gall midge distribution.

15) Myrciamyia maricaensis Maia, 1995

Gall: on bud, ovoid, green or yellow, glabrous, and one-chambered (Fig. 27). Geographic distribution: BRAZIL: RJ: Arraial do Cabo, Cabo Frio, Carapebus, Maricá (Atlantic Forest); SP: Bertioga (Atlantic Forest). Host plants: Myrcia amazonica DC. (synonyms: M. lundiana Kiaersk.) (native to Brazil) and M. ovata Camb. (endemic to Atlantic Forest). Plants distribution: M. amazonica: AC, AM, AP, PA, RO, RR, TO, PE, MA, BA, DF, GO, MT, MG, ES, RJ, SP, PR, SC (Amazon Forest, Atlantic Forest, Cerrado), M. ovata: ES, RJ, SP (Atlantic Forest) (Figs. 28-29). References: Monteiro et al. 1994MONTEIRO RF, FERRAZ FFF, MAIA VC & AZEVEDO MAP. 1994. Galhas entomógenas em restingas: uma abordagem preliminar. In Anais do ACIESP 3: 210-220., Maia 1996bMAIA VC. 1996b. Dois gêneros novos de Cecidomyiidae (Diptera) associados a Myrtaceae, na restinga de Barra de Maricá, Rio de Janeiro, Brasil. Rev Bras Zool 12: 567-574., 2001b, Carvalho-Fernandes et al. 2016CARVALHO-FERNANDES SP, ASCENDINO S, MAIA VC & COURI MS. 2016. Diversity of insect galls associated with coastal shrub vegetation in Rio de Janeiro, Brazil. An Acad Bras Cienc 88: 1407-1418., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

16) Myrciariamyia bivalva Maia, 1994

Gall: on bud, globoid, with two valves, yellow, glabrous (Fig. 30). Geographic distribution: BRAZIL: RJ: Arraial do Cabo, Carapebus, Maricá, Rio de Janeiro (Atlantic Forest) (Fig. 31). Host plant: Myrciaria floribunda. References: Maia 1995MAIA VC. 1995. Myrciariamyia bivalva, gen. n. e sp. n. (Diptera, Cecidomyiidae, Oligotrophini) associado com Myrciaria floribunda (Camb.) Legr. (Myrtaceae) no Rev Bras Zool 11: 635-638., 2001b, 2019, Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

17) Myrciariamyia fernandesi Maia, 2004

Gall: on bud, globoid, bivalve, green, glabrous, and one-chambered (no fig.). Geographic distribution: BRAZIL: MG: Tiradentes (Cerrado). Host plant: Myrciaria tenella (DC.) O, Berg. (native to Brazil). Plant distribution: PA, MA, BA, MG, RJ, SP (Amazon Forest, Atlantic Forest, Caatinga, Cerrado) (Fig. 32). References: Maia 2004MAIA VC. 2004. A new genus and six new species of gall midges (Diptera, Cecidomyiidae) from Serra de São José (Minas Gerais State), Brazil). Arch Mus Nac 62: 69-82., Maia & Fernandes 2004MAIA VC & FERNANDES GW. 2004. Insect galls from Serra de São José (Tiradentes, MG, Brazil). Braz J Biol 64: 423-445., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

Figures 32-36
Cecidomyiidae (Diptera) galls on Myrtaceae and maps of distribution in Brazil. 32. Map of distribution of Myrciariamyia fernandesi Maia, 2004, 33. Gall of Neolasioptera eugeniae Maia, 1993a on Eugenia uniflora L., 34. Map of distribution of N. eugeniae and E. uniflora, 35. Galls of Neomitranthella robusta Maia, 1995 on Neomitranthes obscura (DC.) N. J. E. Silveira, 36. Map of distribution of N. robusta and N. obscura. Green – states of North Region, Orange – states of Northeast Region, Red – states of Southeast Region, Yellow – states of Midwest Region, Blue – states of South Region. Black circles indicate the gall midge distribution.

18) Neolasioptera eugeniae Maia, 1993a

Gall: on leaf, lenticular, green or yellow, glabrous, and one-chambered (Fig. 33). Geographic distribution: BRAZIL: MG: Itamonte (Atlantic Forest); ES: Guarapari (Atlantic Forest); RJ: Arraial do Cabo, Araruama, Angra dos Reis (Ilha Grande), Cabo Frio, Parque Nacional de Itatiaia, Maricá, Niterói* (Barros, A. A. M. de: 1174, RB740235), Nova Iguaçu* (Sobrinho, F. A.: 43, RB443612), Rio de Janeiro, Mangaratiba (Ilha de Marambaia), Paraty, Petropólis* (Leitão, F.: 273, RB468949), Saquarema, São João da Barra (Atlantic Forest) (Fig. 34), PARAGUAY*: Ñeembucú: Tacuaras (Zardini, E. M.: 39026, RB389343). Host plant: E. uniflora. References: Maia 1993aMAIA VC. 1993a. Descrição de duas espécies novas de Cecidomyiidae (Diptera) associadas a Eugenia spp. (Myrtaceae). Rev Bras Entomol 37: 717-721., 2013, 2014MAIA VC. 2014. Insect galls of Itamonte (Minas Gerais, Brazil): characterization and occurrence. Biota Neotrop 14: 1-17. http://www.biotaneotropica.org.br/v14n1/en/abstract?article., 2019, 2020MAIA VC. 2019. Insect Galls on Myrtaceae: Richness and Distribution in Brazilian Restingas. Biota Neotrop 19: e20180526., Monteiro et al. 1994MONTEIRO RF, FERRAZ FFF, MAIA VC & AZEVEDO MAP. 1994. Galhas entomógenas em restingas: uma abordagem preliminar. In Anais do ACIESP 3: 210-220., Oliveira & Maia 2005OLIVEIRA JC & MAIA VC. 2005. Ocorrência e caracterização de galhas de insetos na restinga de Grumari (Rio de Janeiro, RJ, Brasil). Arch Mus Nac 63: 669-676., Maia & Oliveira 2010MAIA VC & OLIVEIRA JC. 2010. Galhas de insetos da Reserva Biológica Estadual da Praia do Sul (Ilha Grande, Angra dos Reis, RJ). Biota Neotrop 10: 227-238. http://www.biotaneotropica.org.br/v10n4/pt/abstract?inventory+bn04110042010 (last access on 17/March/2020)., Fernandes & Maia 2011FERNANDES SP & MAIA VC. 2011. Registros de galhas de insetos no município de Paraty (RJ, Brasil). In: Congresso de Ecologia do Brasil, São Lourenço – MG. http://seb-ecologia.org.br/revistas/indexar/anais/xceb/resumos/482.pdf.
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, Silva & Rodrigues 2011SILVA LO & RODRIGUES AR. 2011. Galhas de inseto do Parque Municipal da Boca da Barra, Cabo Frio (RJ). In: Livro de resumos do X Congresso de Ecologia do Brasil. Sociedade de Ecologia do Brasil (SEB), Universidade de São Paulo. São Paulo. http://seb-ecologia.org.br/revistas/indexar/anais/xceb/resumos/449.pdf.
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, Maia & Souza 2013MAIA VC & SOUZA MC. 2013. Insect galls of the xeric vegetation of Ilha do Cabo Frio (Arraial do Cabo, RJ, Brazil). Biota Neotrop 13: 278-288. http://www.biotaneotropica.org.br/v13n3/en/abstract?inventory+bn02213032013., Rodrigues et al. 2014Rodrigues AR, Maia VC & Couri MS. 2014. Insect galls of restinga areas of Ilha da Marambaia, Rio de Janeiro, Brazil. Rev Bras Entomol 58: 173-197., Carvalho-Fernandes et al. 2016CARVALHO-FERNANDES SP, ASCENDINO S, MAIA VC & COURI MS. 2016. Diversity of insect galls associated with coastal shrub vegetation in Rio de Janeiro, Brazil. An Acad Bras Cienc 88: 1407-1418., Maia & Silva 2016MAIA VC & SILVA LO. 2016. Insect galls of restinga de Marambaia (Barra de Guaratiba, Rio de Janeiro, RJ). Braz J Biol 73: 787-795., Maia & Mascarenhas 2017MAIA VC & MASCARENHAS B. 2017. Insect galls of the Parque Nacional do Itatiaia (Southeast Region, Brazil). An Acad Bras Cienc 89: 505-575., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

19) Neomitranthella robusta Maia, 1994

Gall: on bud, pineapple-like, green, without internal chamber (Fig. 35). Geographic distribution: BRAZIL: ES: Guarapari (Atlantic Forest); RJ: Arraial do Cabo, Araruama, Cabo Frio, Carapebus, Maricá, Rio de Janeiro* (Equipe do Arboreto, RB 425954), Saquarema (Atlantic Forest) (Fig. 36). Host plant: Neomitranthes obscura. References: Maia 1996bMAIA VC. 1996b. Dois gêneros novos de Cecidomyiidae (Diptera) associados a Myrtaceae, na restinga de Barra de Maricá, Rio de Janeiro, Brasil. Rev Bras Zool 12: 567-574., 2001b, Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

20) Stephomyia clavata Tavares, 1920

Gall: on leaf, claviform, green or red, glabrous, and one-chambered (Fig. 37). Geographic distribution: BRAZIL: BA: Madre de Deus (Atlantic Forest). Host plant: undetermined Myrtaceae. References: Tavares 1920TAVARES JS. 1920. [continuation of:] Cecidologia brazileira: cecidias que se criam em plantas das famílias das Leguminosae, Sapotaceae, Lauraceae, Myrtaceae, Punicaceae, Aurantiaceae, Malpighiaceae, Sapindaceae, Umbelliferae, Loranthaceae, Apocynaceae, Urticaceae, Salicaceae e Gramineae. Broteria Ser Zool 18: 97-125I., Gagné 1994GAGNÉ RJ. 1994. The Gall Midges of the Neotropical Region, 1st ed., Ithaca: Cornell University Press, 352 p., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

Figures 37-44
Cecidomyiidae (Diptera) galls on Myrtaceae and maps of distribution in Brazil. 37. Galls of Stephomyia clavata Tavares, 1920. 38. Map of distribution of S. clavata and Eugenia hiemalis Cambess., 39. Map of distribution of S. clavata and Eugenia astringens Cambess., 40. Map of distribution of Stephomyia epeugeniae Gagné, 1994 and Eugenia punicifolia (Kunth.) DC., 41. Galls of Stephomyia espiralis Maia, 1993b on Eugenia copacabanensis Kiaersch., 42. Gall of Stephomyia mina Maia, 1993b on Neomitranthes obscura (DC.) N. J. E. Silveira, 43. Galls of Stephomyia rotundifoliorum Maia, 1993b on Eugenia astringens Cambess., 44. Galls of Stephomyia tetralobae Maia, 1993b on Eugenia copacabanensis Kiaersch. Green – states of Northt Region, Orange – states of Northeast Region, Red – states of Southeast Region, Yellow – states of Midwest Region, Blue – states of South Region. Black circles indicate the gall midge distribution.

Maia, 2001b and Maia & Silva 2016MAIA VC & SILVA LO. 2016. Insect galls of restinga de Marambaia (Barra de Guaratiba, Rio de Janeiro, RJ). Braz J Biol 73: 787-795. recorded similar galls on Eugenia hiemalis Cambess. (synonym: E. multiflora Cambess) (native to Brazil) (Atlantic Forest, Cerrado) and E. astringens (Figs. 38-39), respectively. The gall-inducing species was identified as Stephomyia cfr. clavata and Stephomyia clavata. Distribution: Brazil: RJ: Carapebus, Rio de Janeiro (Atlantic Forest). Plant distribution: E. hiemalis: MS, MG, RJ, SP, PR, SC, RS. References: Maia 2001bMAIA VC. 2001b. The gall midges (Diptera, Cecidomyiidae) from three restingas of Rio de Janeiro State, Brazil. Rev Bras Zool 18: 305-656., Maia & Silva 2016MAIA VC & SILVA LO. 2016. Insect galls of restinga de Marambaia (Barra de Guaratiba, Rio de Janeiro, RJ). Braz J Biol 73: 787-795..

21) Stephomyia epeugeniae Gagné, 1994

Gall: on leaf and stem, ellipsoidal, glabrous, one-chambered (no fig.). Geographic distribution: BRAZIL: RJ: Rio de Janeiro (Atlantic Forest); Minas Gerais: Belo Horizonte (Cerrado); Host plants: Eugenia sp. and Eugenia punicifolia (Kunth.) DC. (= Eugenia ovalifolia Cambess.) (Myrtaceae) (endemic to Brazil) (Amazon Forest, Atlantic Forest, Caatinga, and Cerrado) (Fig. 40). References: Tavares 1916TAVARES JS. 1916. Cecidomyias novas do Brazil. Broteria Ser Zool 14: 36-57., Möhn 1962MÖHN E. 1962. Studien uber neotropische Gallmücken (Diptera, Itonididae). 1. Teil. Broteria 31: 211-239., Gagné 1994GAGNÉ RJ. 1994. The Gall Midges of the Neotropical Region, 1st ed., Ithaca: Cornell University Press, 352 p., Fernandes et al. 1988FERNANDES GWA, NETO ET & MARTINS RP. 1988. Ocorrência e caracterização de galhas entomógenas do Campus Pampulha da Universidade Federal de Minas Gerais. Rev Bras Zool 5: 11-29., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

22) Stephomyia espiralis Maia, 1993b

Gall: on leaf, spiral-shaped, green or red, glabrous, and one-chambered (Fig. 41). Geographic distribution: BRAZIL: RJ: Arraial do Cabo, Araruama, Cabo Frio, Carapebus, Maricá, Rio de Janeiro, Mangaratiba (Ilha de Marambaia) (Atlantic Forest) (Fig. 8). Host plant: Eugenia copacabanensis. References: Maia 1993bMAIA VC. 1993b. Considerações sobre Stephomyia Tavares (Diptera, Cecidomyiidae, Asphondyliidi), com descrição de quatro espécies novas associadas com Eugenia L. e Neomitranthes obscura (DC.) Legr. (Myrtaceae). Rev Bras Zool 10: 521-530., 1999, 2001b, Rodrigues et al. 2014Rodrigues AR, Maia VC & Couri MS. 2014. Insect galls of restinga areas of Ilha da Marambaia, Rio de Janeiro, Brazil. Rev Bras Entomol 58: 173-197., Carvalho-Fernandes et al. 2016CARVALHO-FERNANDES SP, ASCENDINO S, MAIA VC & COURI MS. 2016. Diversity of insect galls associated with coastal shrub vegetation in Rio de Janeiro, Brazil. An Acad Bras Cienc 88: 1407-1418., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

23) Stephomyia mina Maia, 1993b

Gall: on leaf, conical, green or red, glabrous, and one-chambered (Fig. 42). Geographic distribution: BRAZIL: RJ: Arraial do Cabo, Araruama, Carapebus, Maricá, Rio de Janeiro (Grumari) (Atlantic Forest) (Fig. 17). Host plant: Neomitranthes obscura. References: Maia 1993bMAIA VC. 1993b. Considerações sobre Stephomyia Tavares (Diptera, Cecidomyiidae, Asphondyliidi), com descrição de quatro espécies novas associadas com Eugenia L. e Neomitranthes obscura (DC.) Legr. (Myrtaceae). Rev Bras Zool 10: 521-530., 2001b, Carvalho-Fernandes et al. 2016CARVALHO-FERNANDES SP, ASCENDINO S, MAIA VC & COURI MS. 2016. Diversity of insect galls associated with coastal shrub vegetation in Rio de Janeiro, Brazil. An Acad Bras Cienc 88: 1407-1418., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

24) Stephomyia rotundifoliorum Maia, 1993b

Gall: on bud, cylindrical, brown, glabrous, and one-chambered (Fig. 43). Geographic distribution: BRAZIL: RJ: Arraial do Cabo, Araruama, Cabo Frio, Carapebus, Maricá, Rio de Janeiro, Saquarema, São João da Barra (Fig. 26). Host plant: E. astringens. References: Maia 1993bMAIA VC. 1993b. Considerações sobre Stephomyia Tavares (Diptera, Cecidomyiidae, Asphondyliidi), com descrição de quatro espécies novas associadas com Eugenia L. e Neomitranthes obscura (DC.) Legr. (Myrtaceae). Rev Bras Zool 10: 521-530., 2001b, 2020, Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

25) Stephomyia tetralobae Maia, 1993b

Gall: on leaf, conical, green or red, glabrous, and one-chambered (Fig. 44). Geographic distribution: BRAZIL: RJ: Arraial do Cabo, Carapebus, Maricá, Rio de Janeiro (Fig. 8). Host plant: Eugenia copacabanensis. References: Maia 1993bMAIA VC. 1993b. Considerações sobre Stephomyia Tavares (Diptera, Cecidomyiidae, Asphondyliidi), com descrição de quatro espécies novas associadas com Eugenia L. e Neomitranthes obscura (DC.) Legr. (Myrtaceae). Rev Bras Zool 10: 521-530., 2001b, Carvalho-Fernandes et al. 2016CARVALHO-FERNANDES SP, ASCENDINO S, MAIA VC & COURI MS. 2016. Diversity of insect galls associated with coastal shrub vegetation in Rio de Janeiro, Brazil. An Acad Bras Cienc 88: 1407-1418., Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital..

DISCUSSION

Myrtaceae sheltered 25 gall midge species obtained from 25 gall morphotypes on 13 host plant species of five genera in Brazil. Comparing their richness of cecidomyiid galls to that of other Neotropical localities, we can realize that these values are much higher in Brazil. Quintero et al. 2014QUINTERO C, GARIBALDI LA, GREZ A, POLIDORI C & NIEVES JL. 2014. Galls of the Temperate Forest of Southern South America: Argentina and Chile. In: FERNANDES GW & SANTOS JC (Eds), Neotropical Insect Galls. Springer, p. 429-463. recorded only two gall morphotypes in the temperate forests of Southern South America, one on Myrceugenia lanceolata (Jaume) Kausel and the other on Myrceugenia rufa (Colla) Skottsb ex. Kausel, but only one gall midge species was identified, Oligotrophus eugeniae Kieffer & Herbst, 1909. Medianero et al. 2014MEDIANERO E, BARRIOS E & NIEVES-AUDREY JL. 2014. Gall-inducing insects and their associated parasitoid assemblages in the forets of Panama. In: FERNANDES GW & SANTOS JC (Eds.), Neotropical Insect Galls. Springer, p. 465-496. reported eight gall morphotypes induced by arthropods on two species of Myrtaceae in forests of Panama, without discriminating them in other taxonomic categories. One host species is Stylogyne standleyi Lundell. and the other was identified only at family level. The former hosted one and the latter seven gall morphotypes. Hanson & Gómez-Laurito 2005HANSON PE & GÓMEZ-LAURITO J. 2005. Diversity of Gall-inducing Arthropds of Costa Rica. In: RAMAN A, SCHAEFER CW & WITHERS TM (Eds), Biology, Ecology, and Evolution of Gall-inducing Arthropods, Enfiel, US, Olymouth, UK, Science Publishers Inc., 2: 673-692. recorded 13 gall morphotypes induced by cecidomyiids in Costa Rica. Nevertheless, data on their identification were not provided. These comparative data reveal that Myrtaceae in Brazil have an important role as host family of gall midge species. Other important hosts are Fabaceae and Asteraceae. These three families together shelter 36% of the Brazilian fauna of Cecidomyiidae, while the remaining 64% occur on 48 other plant families. However, no studies about cecidomyiids on Fabaceae and Asteraceae have been developed in Brazil.

Five genera of Myrtaceae host gall midges in Brazil. Although the number of host species varies a little among them, the number of cecidomyiid species varies greatly. Eugenia hosted the greatest richness of gall midge species (56% of the total). This is the most speciose genus of Myrtaceae, being well represented in abundance, frequency and richness in several Brazilian vegetal formations (Romagnolo & Souza 2006ROMAGNOLO MB & SOUZA MC. 2006. O gênero Eugenia L. (Myrtaceae) na planície de alagável do Alto Rio Paraná, Estados de Mato Grosso do Sul e Paraná, Brasil. Acta Bot Brasílica 20: 529-548.). Furthermore, Eugenia is widely distributed in Brazil, where it occurs in every biomes and states (Flora e Funga do Brasil 2020). According to the hypothesis of plant species richness, there is a positive correlation between plant species number and gall-inducing species richness (Price et al. 1986PRICE P, WARING GL & FERNANDES GW. 1986. Hypotheses on the adaptative nature of galls. Proc Entomol Soc Wash 88: 361-363.). The hypothesis of resource concentration predicts a positive correlation between plant species abundance and gall-inducers richness (Begon et al. 1996BEGON M, HARPER JL & TOWSENDY CR. 1996. Ecology: individuals, populations and communitites, 3rd ed., Malden, Blackwell Science Ind, 1068 p.), and the hypothesis of geographic area indicates that plants with wide distribution shelter more gall-inducing species than plants with more restricted distribution (Southwood 1960SOUTHWOOD TRE. 1960. The abundance of the Hawaiian trees and the number of their associated insect species. Proc Hawai Entomol Soc 17: 299-303.). Therefore, these parameters could explain the richness of gall-inducing species on Eugenia.

All studied host plants have economic importance, at least potentially. They are ornamental, have edible fruits, and/or are used in reforestation programs, folk medicine and/or to produce fuel, charcoal, juices, ice creams, liqueurs, wines, teas, and jellies (Table III) (Lorenzi & Souza 2001LORENZI H & SOUZA HM. 2001. Plantas Ornamentais no Brasil: arbustivas, herbáceas e trepadeiras. 3º ed. Instituto Plantarum de Estudo da Flora, Nova Odessa, 1087., Lorenzi et al. 2006LORENZI H, BACHER L, LACERDA M & SARTORI S. 2006. Frutas Brasileiras e Exóticas Cultivadas. Instituto Plantarum de Estudo da Flora, Nova Odessa, 650 p., Useful Tropical Plants 2014USEFUL TROPICAL PLANTS. 2014. Available on: <http://tropical.theferns.info.>. Access in: 27 April 2020.
http://tropical.theferns.info...
). Some species are currently being examined for their antimicrobial, antitumor, anti-inflammatory and/or antioxidant properties, and/or tested as bioinsecticide (Basting et al. 2014BASTING RT ET AL. 2014. Antinociceptive, anti-inflammatory and gastroprotective effects of a hydroalcoholic extract from the leaves of Eugenia punicifolia (Kunth) DC. in rodents. J Ethnopharmacol 157: 257-267., Carvalho-Junior et al. 2014CARVALHO-JUNIOR AR, GOMES GA, FERREIRA RO & CARVALHO MG. 2014. Constituintes químicos e atividade antioxidante de folhas e galhos de Eugenia copacabanensisKiaersk (Myrtaceae). Quim Nova 37: 477-482., Galeno et al. 2014GALENO DML, CARVALHO RP, BOLETI APA, LIMA AS, ALMEIDA PDO, PACHECO CC, SOUZA TP & LIMA ES. 2014. Extract from Eugenia punicifolia is an antioxidant and inhibits enzymes related to metabolic syndrome. Appl Biochem Biotechnol 172: 311-324., Alvarenda et al. 2015ALVARENDA FQ, ROYO VA, MOTA BFC, LAURENTIZ RS, MENEZES EV, MELO JUNIOR AF & OLIVEIRA DA. 2015. Atividade antinociceptiva e antimicrobiana da casca do caule de Psidium cattleyanum Sabine. Rev Bras de Plantas Medicinais 17: 1125-1133., Tietbohl et al. 2017TIETBOHL LAC, OLIVEIRA AP, ESTEVES RS, ALBUQUERQUE RDDG, FOLLY D, MACHADO FP, CORRÊA AL, SANTOS MG, RUIZ ALG & ROCHA L. 2017. Antiproliferative activity in tumor cell lines, antioxidant capacity and total phenolic, flavonoid and tannin contents of Myrciaria floribunda. An Acad Bras Cienc 89: 1111-1120., Nuñez et al. 2018NUÑEZ JG, PINHEIRO JS, SILVEIRA GF, BECKENKAMP A, BUFFON A & BRUNO AN. 2018. Antineoplastic potential of the aqueous crude extract of Eugenia uniflora L. in human cervical cancer. Braz J Pharm Sci 54: e17267. https://doi.org/10.1590/s2175-97902018000217267.
https://doi.org/10.1590/s2175-9790201800...
, Moura et al. 2018MOURA GS, OLIVEIRA IJ, BONOME LTS & FRANZENER G. 2018. Eugenia uniflora L.: potential uses as a bioactive plant. Arq Inst Biol 85: 1-9, e0752017., Coradin et al. 2018CORADIN L, CAMILLO J & PAREYN FGC. 2018. Espécies nativas da flora brasileira de valor econômico atual ou potencial: plantas para o futuro: região Nordeste. Brasília, DF: MMA, 2018. (Série Biodiversidade; 51). Available on 27 April 2020., D.D. Nunes unpublished data). Besides, they have ecological importance since their fruits are food for wild animals, such as birds, bats, monkeys and fishes (Gressler 2006GRESSLER E. 2006. Polinização e dispersão de sementes em Myrtaceae do Brasil. Rev Bras Bot 29: 509-530.). As gall-inducers can negatively affect their hosts, resulting in reduction of plant growth and flowering, and decrease in fruit quality and size (McCrea et al. 1985MCCREA KD, ABRAHAMSON WG & WEIS AE. 1985. Goldenrod ball gall effects on Solidago altissima: 14C translocation and growth. Ecol 66: 1902-1901., Fernandes 1987FERNANDES GW. 1987. Gall-forming insects: their economic importance and control. Rev Bras Entomol 31: 379-398., Constantino et al. 2009CONSTANTINO PAL, MONTEIRO RF & WILSON MD. 2009. Gall midge attack intensity and host-plant response in a Neotropical coastal ecosystem. Rev Bras Entomol 53: 391-397.), their impact to these plant species should be investigated as well as methods to control them.

Table III
Myrtaceae: host species of gall midges in Brazil and their human uses.

Concerning plant species origin, seven are endemic to Brazil, five of them endemic to the Atlantic Forest, an expected result since Myrtaceae is the woody family with most endemism in the Atlantic Forest, as already mentioned. Information about host plant endemism is very important since most cecidomyiid species are monophagous, so their exclusive occurrence on endemic plants reveals that they are also endemic. From 25 gall midge species, 16 (64%) occur on endemic plants, 14 of them (56%) exclusively, since they are monophagous. The other two species, Myrciamyia maricaensis and Stephomyia clavata, have two hosts. The former induces galls on Myrcia amazonica (native to Brazil) and Myrcia ovata (endemic), and the latter on Eugenia hiemalis (native) and Eugenia astringens (endemic). The high number of Cecidomyiidae on exclusively endemic hosts illustrates how the Brazilian fauna on Myrtaceae is peculiar.

Regarding gall midge genera, nine are exclusively Neotropical: Anasphondylia, Brethesiamyia, Elachypalpus, Fernandesia, Jorgenseniella, Neomitranthella, Eugeniamyia, Myrciamyia, and Myrciariamyia. Among them, the first six are known from a single described species, while Eugeniamyia, Myrciamyia, and Myrciariamyia comprise two, two and three described species, respectively. Eugeniamyia occurs only on Myrtaceae, the others also on other families. Two gall midge genera occur in Nearctic and Neotropical Regions, Neolasioptera with 134 species, and Stephomyia with seven species. The last comprises six exclusively Neotropical species (Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital.). Phylogenetic studies indicated that Stephomyia origin is probably in South America and the basal host plant belongs to Myrtaceae (Maia & Barbosa 2018MAIA VC & BARBOSA LS. 2018. Phylogeny of the genus Stephomyia Tavares, 1916 (Diptera, Cecidomyiidae). Braz J Biol 78: 76-86. http://dx.doi.org/10.1590/1519-6984.05216.
https://doi.org/10.1590/1519-6984.05216...
). The other two gall midge genera, Clinodiplosis and Dasineura are cosmopolitan, very diverse, with 107 and 476 species, respectively, and occur on several plant families (Gagné & Jaschhof 2017GAGNÉ RJ & JASCHHOF M. 2017. A catalog of the Cecidomyiidae (Diptera) of the world, 4th Edition. Digital.). These data indicate that at least five cecidomyiidi genera did not evolve exclusively on Myrtaceae. This discussion can not be extended to Anasphondylia, Brethesiamyia, Elachypalpus, Fernandesia, Jorgenseniella, and Neomitranthella, since they are known from a single species or to Eugeniamyia, with only two described species.

Most gall midge species have been recorded in the Atlantic Forest, probably due to the great richness of Myrtaceae in this biome. In fact, Myrtaceae are considered a model group in the Atlantic Forest, being a reliable indicato of total tree diversity from the whole biome as well as in every vegetation subcategory (Lucas & Bünger 2015LUCAS EJ & BÜNGER MO. 2015. Myrtaceae in the Atlantic Forest: their role as a “model” group. Biodivers Conserv 24: 2165-2180.). In many publications that address the floristic composition of the Atlantic Forest, Myrtaceae appear as the richest or one of the richest families (Wagner & Fiaschi 2020WAGNER MA & FIASCHI P. 2020. Myrtaceae from the Atlantic forest subtropical highlands of São Joaquim National Park (Santa Catarina, Brazil). Rodriguesia 71: e04032017. https://doi.org/10.1590/2175-7860202071006.
https://doi.org/10.1590/2175-78602020710...
). These data favor the plant species richness. Besides, most taxonomical studies about gall midges have being focused on the Atlantic Forest. In the last 30 years, 143 species of gall midges have been described from Brazilian fauna, 107 (74.8%) from this biome.

Eight gall midge species are restricted to the Atlantic Forest and two species, Brethesiamyia myrciae and Myrciariamyia fernandesi, are currently only known from the Cerrado, while their host plants occur naturally in other biomes. Elachypalpus psidii is known only from Pelotas (RS), a municipality totally occupied by Pampa, but its host plant, Psidium cattleianum, does not occur naturally in this biome. In fact, E. psidii was obtained from a cultivated area of the EMBRAPA (Empresa Brasileira de Pesquisa Agropecuária), where this plant has been investigated due to its economic importance. In addition to being restricted to a single biome, most cecidomyiids are also restricted to a single Brazilian state, showing that their area of occurrence is still poorly known. Most records have been reported in RJ, the most investigated state. Comparing the distribution of gall midge species with that of their host plants, we can notice that the latter is always wider than the former, which suggests that their distribution area can be wider. Some procedures could provide data to fill these gaps, such as field-sampling in poorly studied areas, consultation of exsiccates from different herbaria (virtually or in person), and collaboration of researchers investigating this plant family.

CONCLUSION

Myrtaceae in Brazil shelter 25 gall midge species, 14 of them occur exclusively on endemic plants (56%), what reveals the great peculiarity of the Brazilian fauna. Eugenia is the plant genus with the highest richness of cecidomyiid species and also the most speciose among all Myrtaceae genera. All hosts have economic importance at least potentially, what attaches importance to their gall-inducers.

The great majority of cecidomyiid species are known from a single biome and most occur exclusively in the Atlantic Forest, biome with high diversity and endemism of Myrtaceae. These data suggests that the Atlantic Forest can be an important hotspot of gall midges diversity on Myrtaceae. The comparison between the geographic distribution of the host plants and that of their respective gall-inducers shows that the former is always wider than the second, so the distribution area of cecidomyiid species can be larger than that currently known.

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Publication Dates

  • Publication in this collection
    11 Aug 2023
  • Date of issue
    2023

History

  • Received
    09 May 2020
  • Accepted
    31 Aug 2020
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