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Streblid flies parasitizing cave bats in Carajás, Amazonia, with a new record for Brazil

ABSTRACT

Streblid flies (Diptera: Streblidae) are hematophagous and highly specialized parasitic insects, found only on bats (Chiroptera). Caves are important roosts for bats but, despite harboring high bat richness, relatively few studies exist on the ecology and biology of streblid flies in cave environments, especially in Amazonia, the largest domain in northern Brazil, with >140 bat species and thousands of caves. To fill some of the gaps in the geographical distribution and interspecific relationships for streblid flies in the region, we sampled bats in six caves in Carajás National Forest, a protected area in Pará state (Brazil). Thirteen of the 14 streblid species found are new records for Carajás, with three new records for Pará state and two for the northern region of Brazil. Nycterophilia fairchildi was recorded for the first time in Brazil. Most streblids had host-specific behavior, however, N. fairchildi, Trichobius caecus, and T. johnsonae were less host-specific, parasitizing different Pteronotus bat species. The gregarious behavior of Pteronotus species and the spatial distribution of their colonies within the caves may be important factors in the flies’ exchange among congener hosts and deserve special attention in future studies. Furthermore, studies on ecological interaction networks between bats and their ectoparasitic flies in caves will be useful for a broader understanding of how this relationship is structured over time and space, as well as its impact on both bats and flies.

KEYWORDS:
biospeleology; Chiroptera; Diptera; ectoparasites; host-parasite relationship; Streblidae

RESUMO

Moscas estréblidas (Diptera: Streblidae) são insetos hematófagos e parasitas encontrados apenas sobre morcegos (Chiroptera). As cavernas são abrigos importantes para morcegos, mas, apesar de abrigarem alta riqueza desses mamíferos, são relativamente poucos os estudos focados na ecologia e biologia de moscas estréblidas em ambientes cavernícolas, especialmente na Amazônia, o maior domínio no norte do Brasil, com >140 espécies de morcegos e milhares de cavernas. Para preencher algumas das lacunas na distribuição geográfica e nas relações interespecíficas de moscas estréblidas na região, amostramos morcegos cavernícolas em seis cavernas na Floresta Nacional de Carajás, uma área protegida no estado do Pará. Treze das 14 espécies de moscas estréblidas encontradas são novos registros para Carajás, com três novos registros para o Pará e dois para a região norte do Brasil. Nycterophilia fairchildi foi registrada pela primeira vez no Brasil. A maioria das espécies de moscas foi hospedeiro-específica; entretanto, N. fairchildi, Trichobius caecus e T. johnsonae foram menos específicas, parasitando diferentes espécies de morcegos do gênero Pteronotus. O comportamento gregário das espécies de Pteronotus e a distribuição espacial de suas colônias dentro das cavernas podem ser fatores importantes na troca de moscas entre hospedeiros congêneres e merecem atenção especial em estudos futuros. Adicionalmente, estudos sobre redes de interação ecológica entre morcegos e suas moscas ectoparasitas em cavernas serão úteis para uma compreensão mais ampla de como essa relação se estrutura no tempo e no espaço, bem como sobre o seu impacto, tanto sobre os morcegos como sobre as moscas.

PALAVRAS-CHAVE:
bioespeleologia; Chiroptera; Diptera; ectoparasitas; relação parasita-hospedeiro; Streblidae

INTRODUCTION

Although most insects are free-living, many have evolved a parasitic lifestyle and have numerous adaptations to live in or on their hosts (Poulin 2007Poulin, R. 2007. Evolutionary Ecology of Parasites, 2nd ed. Princeton University Press, Princeton, 332p.). This is the case of streblids (Diptera: Streblidae), a morphologically diverse, highly specialized group of flies that exclusively parasitize bats (Wenzel et al. 1966Wenzel, R.L.; Tipton, V.J.; Kiewlicz, A. 1966. The streblid bat flies of Panama (Diptera: Calyptera: Streblidae). In: Wenzel, R.L.; Tipton, V.J. (Ed.). Ectoparasites of Panama. Field Museum of Natural History, Chicago, p.405-675.). These flies spend their entire adult stage on the fur or wing membranes of bats, where both males and females feed on the host’s blood (Wenzel et al. 1966). Many streblid flies are strikingly host-specific, being restricted to a single bat species (Barbier et al. 2019Barbier, E.; Graciolli, G.; Bernard, E. 2019. Structure and composition of Nycteribiidae and Streblidae flies on bats along an environmental gradient in northeastern Brazil. Canadian Journal of Zoology, 97: 409-418., 2021). On the other hand, some species may show less host specificity, associating with different species of the same genus or even different genera of the same bat family (Dick and Dittmar 2014Dick, C.W.; Dittmar, K. 2014. Parasitic bat flies (Diptera: Streblidae and Nycteribiidae): host specificity and potential as vectors. In: Klimpel, S.; Mehlhorn, H. (Ed.). Bats (Chiroptera) as Vectors of Diseases and Parasites. Springer, Berlin, p.131-155.; Barbier and Bernard 2017). Like its host bats, streblid flies are worldwide in distribution, but much more diverse in the tropics (Dick and Patterson 2006Dick, C.W.; Patterson, B.D. 2006. Bat flies: obligate ectoparasites of bats. In: Morand, S.; Krasnov, B.R.; Poulin, R. (Ed.). Micromammals and Macroparasites: From Evolutionary Ecology to Management. Springer-Verlag, Tokyo, p.179-194.; Dick and Dittmar 2014).

The Brazilian Amazon is, by far, the least studied domain of the distribution range of bat-streblid relationships (Lourenço et al. 2016Lourenço, E.C.; Almeida, J.C.; Famadas, K.M. 2016. Richness of ectoparasitic flies (Diptera: Streblidae) of bats (Chiroptera) - a systematic review and meta-analysis of studies in Brazil. Parasitology Research, 115: 4379-4388.; Barbier and Bernard 2017Barbier, E.; Bernard, E. 2017. From the Atlantic Forest to the borders of Amazonia: species richness, distribution, and host association of ectoparasitic flies (Diptera: Nycteribiidae and Streblidae) in northeastern Brazil. Parasitology Research, 116: 3043-3055.). Amazonia is one of the regions with the greatest bat species richness in the world (López-Baucells et al. 2016López-Baucells, A.; Rocha, R.; Bobrowiec, P.; Bernard, E.; Palmeirim, J.; Meyer, C. 2016. Field Guide to Amazonian Bats. Editora INPA, Manaus, 174p.) and holds thousands of caves, which are important roosts for more than 70 bat species in Brazil (Oliveira et al. 2018Oliveira, H.F.M.; Oprea, M.; Dias, R.I. 2018. Distributional patterns and ecological determinants of bat occurrence inside caves: a broad scale meta-analysis. Diversity, 10: 49. doi:10.3390/d10030049
https://doi.org/10.3390/d10030049...
). There is little research on bats and their parasites in northern Brazil, and even less in cave environments (Barbier and Benard 2017; Urbieta et al. 2022Urbieta, G.L.; Graciolli, G.; Tavares, V.C. 2022. Review of studies about bat-fly interactions inside roosts, with observations on partnership patterns for publications. Parasitology Research, 121: 3051-3061.). However, recently there have been significant advances in the study of bat ectoparasitic flies in the region (Hrycyna et al. 2019Hrycyna, G.; Martins, A.C.M.; Graciolli, G. 2019. Infracommunities of bat flies (Diptera: Streblidae and Nycteribiidae) of bats (Mammalia: Chiroptera) in three conservation units in the State of Amapá, Brazil. Biota Neotropica, 19: e20180715.; Palheta et al. 2020Palheta, L.R.; Urbieta, G.L.; Brasil, L.S.; Dias-Silva, K.; Silva, J.B.; Graciolli, G.; Aguiar, L.M.S.; Vieira, T.B. 2020. The effect of urbanization on bats and communities of bat flies (Diptera: Nycteribiidae and Streblidae) in the Amazon, northern Brazil. Acta Chiropterologica, 22: 403-416.), revealing a rich diversity of streblid fauna and their potential host bat species. Here we fill a gap in the knowledge about the geographical distribution and host-parasite relationship of streblid flies on bats in caves in the Carajás National Forest, a protected area in eastern Brazilian Amazonia.

MATERIAL AND METHODS

We collected streblid flies on bats in June and July 2022 during bat monitoring surveys in six caves in the Carajás National Forest (eastern Amazonia), Pará state, Brazil (Table 1; Figure 1). In the region, the caves are located in the upper compartment of rocky ridges that stand out, supported by banded iron formations and canga (iron breccia) vegetation (Piló et al. 2015Piló, L.B.; Auler, A.S.; Martins, F. 2015. Carajás National Forest: Iron ore plateaus and caves in southeastern Amazon. In: Vieira, B.C.; Salgado, A.R.; Santos, L.J.C. (Ed.). Landscapes and Landforms of Brazil. Springer, Dordrecht, p.273-283.). In addition to the canga open vegetation, which is restricted to the iron ore rocky outcrops, the predominant vegetation is ombrophilous forest (Piló et al. 2015). The sampled caves are located at the foot of scarps in a ridge to the north (n = 5) and a ridge to the south (n = 1). The minimum and maximum distances between the caves are of approximately 110 m and 45 km, respectively (Figure 1). Fieldwork and sampling collections were authorized by the Brazilian Institute of Environment and Renewable Natural Resources (IBAMA) through authorization SISBIO # 79066-1 and the Ethics Committee on Animal Care at Universidade Federal de Pernambuco (protocol # 0092/2021 CEUA/UFPE).

Table 1
Geographic coordinates of the six bat caves sampled in the Carajás National Forest, Pará state, Brazil, in June-July 2022.

Figure 1
Location of the study area in eastern Brazilian Amazonia and location of the six caves sampled for bats and streblid flies in the Carajás National Forest in June and July 2022. This figure is in color in the electronic version.

Host bats were captured with hand nets and visually inspected for ectoparasites. Streblid flies were collected with featherweight forceps and preserved in labeled vials with 70% alcohol. Flies were identified at the species level under a stereomicroscope using diagnosis and identification keys proposed by Wenzel et al. (1966Wenzel, R.L.; Tipton, V.J.; Kiewlicz, A. 1966. The streblid bat flies of Panama (Diptera: Calyptera: Streblidae). In: Wenzel, R.L.; Tipton, V.J. (Ed.). Ectoparasites of Panama. Field Museum of Natural History, Chicago, p.405-675.), Wenzel (1976), and Guerrero (1998Guerrero, R. 1998. Notes on Neotropical batflies (Diptera, Streblidae). I. The genus Trichobius, with description of two new species and one new subspecies from Venezuela. Acta Parasitologica, 43: 86-93.). Voucher specimens were deposited in the entomological collection at Universidade Federal de Pernambuco (CE-UFPE) (Table 2). Bats were identified to the lowest possible taxonomic level following López-Baucells et al. (2016López-Baucells, A.; Rocha, R.; Bobrowiec, P.; Bernard, E.; Palmeirim, J.; Meyer, C. 2016. Field Guide to Amazonian Bats. Editora INPA, Manaus, 174p.), Pavan (2019Pavan, A.C. 2019. Family Mormoopidae (ghost-faced, naked-backed and mustached bats). In: Wilson, D.E; Mittermeier, R.A. (Ed.). Handbook of the Mammals of the World: Bats . v.9. Lynx Edicions, Barcelona, p.424-443.), and Díaz et al. (2021Díaz, M.M.; Solari, S.; Gregorin, R.; Aguirre, L.F.; Barquez, R.M. 2021. Clave de Identificación de los Murciélagos Neotropicales. Fundación PCMA, Tucumán, 211p.). Due to the similarity of external morphological features between Pteronotus alitonus and P. rubiginosus (Pavan 2019), we were not able to differentiate these two species in the field. In these cases, we kept the identification at the genus level (i.e. Pteronotus sp.). One bat of each species was collected, fixed, preserved in ethanol, and deposited as a voucher in the mammal collection at Universidade Federal de Pernambuco.

Table 2
List of streblid flies (Diptera: Streblidae) collected on cave bats (Chiroptera) in the Carajás National Forest (Pará state, Brazil) in June and July 2022. N flies = number of streblid flies found on each host bat species. Voucher = zoological collection deposit code.

Based on a weighted matrix (i.e. frequency of observed interactions) containing the streblid fly species as columns and their host bats as rows, we used the ‘visweb’ function from the ‘bipartite’ package in R (Dormann et al. 2008Dormann, C.F.; Gruber, B.; Fruend, J. 2008. Introducing the bipartite package: analysing ecological networks. R News, 8: 8-11.; R Core Team 2021R Core Team. 2021. R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. (https://www.R-project.org/).
https://www.R-project.org/...
) to build a graph illustrating the observed host-parasite interactions. Photographs of fly species were taken at the Laboratory of Advanced Microscopy and Imagery at Universidade Federal de Pernambuco (LAMI-UFPE) using a stereomicroscope (Zeiss SteREO Discovery.V20).

RESULTS

We collected 107 streblid flies (62 males and 45 females) belonging to 14 species, parasitizing 28 bats belonging to nine species and four families (Table 2). Except for Strebla proxima, the other 13 streblid species are the first records for the Carajás National Forest. Furthermore, Trichobius dugesii is a new record for Pará state, T. anducei and T. pallidus are new records for the northern region of Brazil, while Nycterophilia fairchildi is a new record for Brazil. Of the 14 streblid species, 11 (79%) occurred on a single bat species (Figure 2). Trichobius caecus and N. fairchildi were the most generalist streblid species, found parasitizing Pteronotus gymnonotus, P. personatus, and Pteronotus sp. Nycterophilia fairchildi was more abundant on Pteronotus sp., while T. caecus was more abundant on P. gymnonotus (Table 2; Figure 2).

Figure 2
Interactions among cave bats (rows) and streblid flies (columns) in six caves sampled in the Carajás National Forest (eastern Amazonia), Brazil. The darker the cells, the more frequent the observed interaction.

Diptera, Streblidae

Nycterophilia fairchildiWenzel, 1966Wenzel, R.L.; Tipton, V.J.; Kiewlicz, A. 1966. The streblid bat flies of Panama (Diptera: Calyptera: Streblidae). In: Wenzel, R.L.; Tipton, V.J. (Ed.). Ectoparasites of Panama. Field Museum of Natural History, Chicago, p.405-675. (Figure 3a)

Material examined: n = 27 (1 ♂ on a Pteronotus gymnonotus bat, 1 ♂ on a P. personatus, and 11 ♂ and 14 ♀ on six Pteronotus sp.), cave N5SM2-0099, Parauapebas, 30/VI/2022, E. Barbier leg.

Remarks: First record in Brazil. The closest known record of N. fairchildi to our study area is in Sucre, Venezuela, at least 2,300 km away in a straight line (see Wenzel 1976Wenzel, R.L. 1976. The streblid batflies of Venezuela (Diptera: Streblidae). Brigham Young University Science Bulletin, Biological Series, 20: 1-177.). Other previously known records are from Colombia, Costa Rica, Mexico, and Panama (Wenzel et al. 1966; Jirón and Fallas 1974Jirón, F.P.; Fallas F.B. 1974. Presencia de un representante del género Nycterophilia Ferris, 1916 (Diptera: Streblidae) en Costa Rica. Revista de Biología Tropical, 22: 67-70.; Guerrero 1993Guerrero, R. 1993. Catálogo de los Streblidae (Diptera: Pupipara) parásitos de murciélagos (Mammalia: Chiroptera) del Nuevo Mundo. I. Clave para los géneros y Nycterophiliinae. Acta Biologica Venezuelica, 14: 61-75.; Guerrero and Morales-Malacara 1996Guerrero, R.; Morales-Malacara, J.B. 1996. Streblidae (Diptera: Calyptratae) parásitos de murciélagos (Mammalia: Chiroptera) cavernícolas del Centro y Sur de México, con descripción de una especie nueva del género Trichobius. Anales del Instituto de Biología. Serie Zoología, 67: 357-373.). Throughout its known geographic distribution, this fly species seems to occur primarily in association with bats of the genus Pteronotus. Nycterophilia fairchildi resembles N. parnelli, but is easily distinguishable by the density of setae present on the thorax (sparser in N. parnelli) and by the females having four macrosetae at the distal end of the abdomen (instead of two in N. parnelli) (see Wenzel et al. 1966) (Figure 3).

Figure 3
Nycterophilia species collected on cave bats in the Carajás National Forest, eastern Brazilian Amazonia. A - female of Nycterophilia fairchildi, lateral view; B - female of Nycterophilia parnelli, lateral view. Arrows highlight the density of setae present on the thorax and the number of macrosetae at the distal end of the abdomen. Scale bars = 0.5 mm. This figure is in color in the electronic version.

Nycterophilia parnelliWenzel, 1966Wenzel, R.L.; Tipton, V.J.; Kiewlicz, A. 1966. The streblid bat flies of Panama (Diptera: Calyptera: Streblidae). In: Wenzel, R.L.; Tipton, V.J. (Ed.). Ectoparasites of Panama. Field Museum of Natural History, Chicago, p.405-675. (Figure 3b)

Material examined: n = 2 ♀ on a Pteronotus sp. bat, cave N5SM2-0099, Parauapebas, 30/VI/2022, E. Barbier leg.

Remarks: Recently, N. parnelli was recorded parasitizing an undetermined species of Pteronotus in Pará state (Palheta et al. 2020Palheta, L.R.; Urbieta, G.L.; Brasil, L.S.; Dias-Silva, K.; Silva, J.B.; Graciolli, G.; Aguiar, L.M.S.; Vieira, T.B. 2020. The effect of urbanization on bats and communities of bat flies (Diptera: Nycteribiidae and Streblidae) in the Amazon, northern Brazil. Acta Chiropterologica, 22: 403-416.) and P. parnellii in Amapá state, Brazil (Hrycyna et al. 2019Hrycyna, G.; Martins, A.C.M.; Graciolli, G. 2019. Infracommunities of bat flies (Diptera: Streblidae and Nycteribiidae) of bats (Mammalia: Chiroptera) in three conservation units in the State of Amapá, Brazil. Biota Neotropica, 19: e20180715.). However, the host in Amapá was probably P. rubiginosus or P. alitonus. Pteronotus parnellii (Gray, 1843) is morphologically similar to P. rubiginosus and P. alitonus, and is currently considered restricted to Cuba and Jamaica (Pavan 2019Pavan, A.C. 2019. Family Mormoopidae (ghost-faced, naked-backed and mustached bats). In: Wilson, D.E; Mittermeier, R.A. (Ed.). Handbook of the Mammals of the World: Bats . v.9. Lynx Edicions, Barcelona, p.424-443.). In a Caatinga dry forest area in northeastern Brazil, N. parnelli had already been recorded on P. gymnonotus (Barbier et al. 2019Barbier, E.; Graciolli, G.; Bernard, E. 2019. Structure and composition of Nycteribiidae and Streblidae flies on bats along an environmental gradient in northeastern Brazil. Canadian Journal of Zoology, 97: 409-418.).

Strebla guajiro (García & Casal, 1965) (Figure 4a)

Figure 4
Dorsal view of streblid fly species collected on cave bats in the Carajás National Forest, in eastern Brazilian Amazonia. A - female of Strebla guajiro; B - female of Strebla proxima; C - female of Strebla wiedemanni; D - female of Trichobius anducei; E - female of Trichobius caecus; F - male of Trichobius dugesii; G - female of Trichobius dugesioides; H - male of Trichobius joblingi; I - female of Trichobius johnsonae; J - female of Trichobius pallidus; K - male of Trichobius parasiticus; L - male of Trichobius uniformis. Scale bars = 0.5 mm. This figure is in color in the electronic version.

Material examined: n = 3 ♀ on three Carollia perspicillata bats, cave N4E-0023, Parauapebas, 18/VII/2022, E. Barbier leg.

Remarks: This fly species is relatively common, having C. perspicillata as its primary host. It occurs throughout the entire distribution range of this bat, from southern Mexico to southern Brazil (Wenzel et al. 1966Wenzel, R.L.; Tipton, V.J.; Kiewlicz, A. 1966. The streblid bat flies of Panama (Diptera: Calyptera: Streblidae). In: Wenzel, R.L.; Tipton, V.J. (Ed.). Ectoparasites of Panama. Field Museum of Natural History, Chicago, p.405-675.; Barquez et al. 2015Barquez, R.; Perez, S.; Miller, B.; Diaz, M. 2015. Carollia perspicillata. The IUCN Red List of Threatened Species 2015: e.T3905A22133716. ( (https://dx.doi.org/10.2305/IUCN.UK.2015-4.RLTS.T3905A22133716.en ). Accessed on 02 Nov 2022.
https://dx.doi.org/10.2305/IUCN.UK.2015-...
; Barbier and Bernard 2017Barbier, E.; Bernard, E. 2017. From the Atlantic Forest to the borders of Amazonia: species richness, distribution, and host association of ectoparasitic flies (Diptera: Nycteribiidae and Streblidae) in northeastern Brazil. Parasitology Research, 116: 3043-3055.). Strebla guajiro has been recorded for Brazilian Amazonia, including Pará and neighboring states (Santos et al. 2009Santos, C.L.C.; Dias, P.A.; Rodrigues, F.S.; Lobato, K.S.; Rosa, L.C.; Oliveira, T.G.; Rebêlo, J.M.M. 2009. Moscas ectoparasitas (Diptera: Streblidae) de morcegos (Mammalia: Chiroptera) do município de São Luís, MA: taxas de infestação e associações parasito-hospedeiro. Neotropical Entomology, 38: 595-601.; Hrycyna et al. 2019Hrycyna, G.; Martins, A.C.M.; Graciolli, G. 2019. Infracommunities of bat flies (Diptera: Streblidae and Nycteribiidae) of bats (Mammalia: Chiroptera) in three conservation units in the State of Amapá, Brazil. Biota Neotropica, 19: e20180715.; Palheta et al. 2020Palheta, L.R.; Urbieta, G.L.; Brasil, L.S.; Dias-Silva, K.; Silva, J.B.; Graciolli, G.; Aguiar, L.M.S.; Vieira, T.B. 2020. The effect of urbanization on bats and communities of bat flies (Diptera: Nycteribiidae and Streblidae) in the Amazon, northern Brazil. Acta Chiropterologica, 22: 403-416.).

Strebla proximaWenzel, 1976Wenzel, R.L. 1976. The streblid batflies of Venezuela (Diptera: Streblidae). Brigham Young University Science Bulletin, Biological Series, 20: 1-177. (Figure 4b)

Material examined: n = 2 (1 ♂ and 1 ♀ on a Peropteryx kappleri bat), cave N5SM1-031, Parauapebas, 19/VII/2022, E. Barbier leg.

Remarks: Second record for Brazil. In 2018, this fly species was recorded for the first time in the country, also in the Carajás National Forest and in association with P. kappleri (Barbier et al. 2018Barbier, E.; Hintze, F.; Jardelino, A.C.; Bernard, E. 2018. First record of the bat ectoparasitic fly Strebla proxima Wenzel, 1976 (Diptera: Streblidae) from Brazil. Entomological News, 127: 369-374.). The only other known records for this fly species are from Venezuela (Wenzel 1976Wenzel, R.L. 1976. The streblid batflies of Venezuela (Diptera: Streblidae). Brigham Young University Science Bulletin, Biological Series, 20: 1-177.).

Strebla wiedemanni Kolenati, 1856 (Figure 4c)

Material examined: n = 1 ♀ on a Desmodus rotundus bat, cave N5S-0052, Parauapebas, 16/VII/2022, E. Barbier leg.

Remarks: This fly species is a specific parasite for the common vampire bat, D. rotundus, and frequently co-occurs with Trichobius parasiticus (Wenzel et al. 1966Wenzel, R.L.; Tipton, V.J.; Kiewlicz, A. 1966. The streblid bat flies of Panama (Diptera: Calyptera: Streblidae). In: Wenzel, R.L.; Tipton, V.J. (Ed.). Ectoparasites of Panama. Field Museum of Natural History, Chicago, p.405-675.; Wenzel 1976), however, in some areas as the Caatinga dry forest region in Brazil, it seems to be less abundant than the latter (Barbier et al. 2019Barbier, E.; Graciolli, G.; Bernard, E. 2019. Structure and composition of Nycteribiidae and Streblidae flies on bats along an environmental gradient in northeastern Brazil. Canadian Journal of Zoology, 97: 409-418., 2021).

Trichobius anduceiGuerrero, 1998Guerrero, R. 1998. Notes on Neotropical batflies (Diptera, Streblidae). I. The genus Trichobius, with description of two new species and one new subspecies from Venezuela. Acta Parasitologica, 43: 86-93. (Figure 4d)

Material examined: n = 20 (14 ♂ and 6 ♀ on four Carollia perspicillata bats, cave N4E-0023, Parauapebas, 18/VII/2022, E. Barbier leg.

Remarks: New record for Pará state and the northern region of Brazil. In Brazil, previous records were restricted to the southeastern and northeastern portions of the Atlantic Forest (Lourenço et al. 2014Lourenço, E.C.; Patrício, P.M.P.; Pinheiro, M.D.C.; Dias, R.M.; Famadas, K.M. 2014. Streblidae (Diptera) on bats (Chiroptera) in an area of Atlantic Forest, state of Rio de Janeiro. Revista Brasileira de Parasitologia Veterinária, 23: 164-170.; Barbier and Bernard 2017Barbier, E.; Bernard, E. 2017. From the Atlantic Forest to the borders of Amazonia: species richness, distribution, and host association of ectoparasitic flies (Diptera: Nycteribiidae and Streblidae) in northeastern Brazil. Parasitology Research, 116: 3043-3055.). The distance of approximately 1,700 km between the two most far apart records indicates a wide distribution range for T. anducei in the country, which agrees with the fact that its host, C. perspicillata, has one of the widest distributions in the Neotropics (Barquez et al. 2015Barquez, R.; Perez, S.; Miller, B.; Diaz, M. 2015. Carollia perspicillata. The IUCN Red List of Threatened Species 2015: e.T3905A22133716. ( (https://dx.doi.org/10.2305/IUCN.UK.2015-4.RLTS.T3905A22133716.en ). Accessed on 02 Nov 2022.
https://dx.doi.org/10.2305/IUCN.UK.2015-...
).

Trichobius caecus Edwards, 1918 (Figure 4e)

Material examined: n = 24 (11 ♂ and 2 ♀ on six Pteronotus gymnonotus bats, 3 ♂ and 1 ♀ on three P. personatus, and 4 ♂ and 3 ♀ on three Pteronotus sp.), cave N5SM2-0099, Parauapebas, 30/VI/2022, E. Barbier leg.

Remarks: Although there is a wide list of bats as transient/non-primary hosts for T. caecus, this fly species is considered a primary parasite of Mormoopidae, especially of the genus Pteronotus (Guerrero 1994Guerrero, R. 1994. Catálogo de los Streblidae (Diptera: Pupipara) parásitos de murciélagos (Mammalia: Chiroptera) del Nuevo Mundo. II. Los grupos: pallidus, caecus, major, uniformis y longipes del género Trichobius Gervais, 1844. Acta Biologica Venezuelica , 15: 1-18.). The species has been collected previously in northern Brazil, also in Pará state, on an unidentified Pteronotus species by Palheta et al. (2020Palheta, L.R.; Urbieta, G.L.; Brasil, L.S.; Dias-Silva, K.; Silva, J.B.; Graciolli, G.; Aguiar, L.M.S.; Vieira, T.B. 2020. The effect of urbanization on bats and communities of bat flies (Diptera: Nycteribiidae and Streblidae) in the Amazon, northern Brazil. Acta Chiropterologica, 22: 403-416.).

Trichobius dugesii Townsend, 1891 (Figure 4f)

Material examined: n = 1 ♂ on a Glossophaga soricina bat, cave N5S-0057, Parauapebas, 16/VII/2022, E. Barbier leg.

Remarks: Trichobius dugesii is a typical parasite of the widely distributed G. soricina (Guerrero 1995Guerrero, R. 1995. Catálogo de los Streblidae (Diptera: Pupipara) parásitos de murciélagos (Mammalia: Chiroptera) del Nuevo Mundo. III. Los grupos: dugesii, dunni y phyllostomae del género Trichobius Gervais, 1844. Acta Biologica Venezuelica , 15: 1-27.). The species was already known from the border of the Amazon biome in the northeastern Brazilian state of Maranhão (e.g. Santos et al. 2009Santos, C.L.C.; Dias, P.A.; Rodrigues, F.S.; Lobato, K.S.; Rosa, L.C.; Oliveira, T.G.; Rebêlo, J.M.M. 2009. Moscas ectoparasitas (Diptera: Streblidae) de morcegos (Mammalia: Chiroptera) do município de São Luís, MA: taxas de infestação e associações parasito-hospedeiro. Neotropical Entomology, 38: 595-601.), and further north from the Brazilian Amazonian state of Amapá (Hrycyna et al. 2019Hrycyna, G.; Martins, A.C.M.; Graciolli, G. 2019. Infracommunities of bat flies (Diptera: Streblidae and Nycteribiidae) of bats (Mammalia: Chiroptera) in three conservation units in the State of Amapá, Brazil. Biota Neotropica, 19: e20180715.). Our study provides the first record of the species in the state of Pará.

Trichobius dugesioidesWenzel, 1966Wenzel, R.L.; Tipton, V.J.; Kiewlicz, A. 1966. The streblid bat flies of Panama (Diptera: Calyptera: Streblidae). In: Wenzel, R.L.; Tipton, V.J. (Ed.). Ectoparasites of Panama. Field Museum of Natural History, Chicago, p.405-675. (Figure 4g)

Material examined: n = 2 (1 ♂ and 1 ♀ on a Trachops cirrhosus bat), cave S11C-0041, Canaã dos Carajás, 12/VII/2022, E. Barbier leg.

Remarks: In northern Brazil, T. dugesioides was previously recorded in Pará, Amapá, and Roraima states, also mainly in association with T. cirrhosus (Guerrero 1997Guerrero, R. 1997. Catálogo de los Streblidae (Diptera: Pupipara) parásitos de murciélagos (Mammalia: Chiroptera) del Nuevo Mundo. VII. Lista de especies, hospedadores y países. Acta Biologica Venezuelica , 17: 9-24.; Graciolli and Linardi 2002Graciolli, G.; Linardi, P. M. 2002. Some Streblidae and Nycteribiidae (Diptera: Hippoboscoidea) from Maracá Island, Roraima, Brazil. Memórias do Instituto Oswaldo Cruz, 97: 139-141.; Hrycyna et al. 2019Hrycyna, G.; Martins, A.C.M.; Graciolli, G. 2019. Infracommunities of bat flies (Diptera: Streblidae and Nycteribiidae) of bats (Mammalia: Chiroptera) in three conservation units in the State of Amapá, Brazil. Biota Neotropica, 19: e20180715.). This fly species was also found parasitizing T. cirrhosus in the drier Caatinga biome (Barbier et al. 2016Barbier, E.; Prado-Neto, J.G.; Bernard, E. 2016. Records of bat flies (Diptera: Nycteribiidae and Streblidae) in the semi-arid Caatinga in the state of Paraíba, Northeastern Brazil. Neotropical Entomology, 45: 740-745.).

Trichobius joblingiWenzel, 1966Wenzel, R.L.; Tipton, V.J.; Kiewlicz, A. 1966. The streblid bat flies of Panama (Diptera: Calyptera: Streblidae). In: Wenzel, R.L.; Tipton, V.J. (Ed.). Ectoparasites of Panama. Field Museum of Natural History, Chicago, p.405-675. (Figure 4h)

Material examined: n = 6 (1 ♂ and 2 ♀ on two Carollia perspicillata bats, cave S11C-0041, Canaã dos Carajás, 12/VII/2022, E. Barbier leg.; and 3 ♂ on three C. perspicillata in cave N4E-0023, Parauapebas, 18/VII/2022, E. Barbier leg.).

Remarks: Trichobius joblingi is one of the most frequent and abundant streblid fly species reported in the Neotropics (Guerrero 1995Guerrero, R. 1995. Catálogo de los Streblidae (Diptera: Pupipara) parásitos de murciélagos (Mammalia: Chiroptera) del Nuevo Mundo. III. Los grupos: dugesii, dunni y phyllostomae del género Trichobius Gervais, 1844. Acta Biologica Venezuelica , 15: 1-27.; Barbier and Graciolli 2016Barbier, E.; Graciolli, G. 2016. Community of bat flies (Streblidae and Nycteribiidae) on bats in the Cerrado of Central-West Brazil: hosts, aggregation, prevalence, infestation intensity, and infracommunities. Studies on Neotropical Fauna and Environment, 51: 176-187.). In some regions, this fly species occurs on 80% or more of sampled C. perspicillata individuals (Barbier and Graciolli 2016Barbier, E.; Graciolli, G. 2016. Community of bat flies (Streblidae and Nycteribiidae) on bats in the Cerrado of Central-West Brazil: hosts, aggregation, prevalence, infestation intensity, and infracommunities. Studies on Neotropical Fauna and Environment, 51: 176-187.; Barbier et al. 2019, 2021).

Trichobius johnsonaeWenzel, 1966Wenzel, R.L.; Tipton, V.J.; Kiewlicz, A. 1966. The streblid bat flies of Panama (Diptera: Calyptera: Streblidae). In: Wenzel, R.L.; Tipton, V.J. (Ed.). Ectoparasites of Panama. Field Museum of Natural History, Chicago, p.405-675. (Figure 4i)

Material examined: n = 6 (1 ♂ on a Pteronotus personatus bat, and 3 ♂ and 2 ♀ on a Pteronotus sp.), cave N5SM2-0099, Parauapebas, 30/VI/2022, E. Barbier leg.

Remarks: Although T. johnsonae has a wide distribution, parasitizing Pteronotus species in Mexico, Panama, Colombia, and Venezuela, in Brazil it was recorded for the first time only in 2015 (Guerrero 1994Guerrero, R. 1994. Catálogo de los Streblidae (Diptera: Pupipara) parásitos de murciélagos (Mammalia: Chiroptera) del Nuevo Mundo. II. Los grupos: pallidus, caecus, major, uniformis y longipes del género Trichobius Gervais, 1844. Acta Biologica Venezuelica , 15: 1-18.; Guerrero and Morales-Malacara 1996; Figueiredo et al. 2015Figueiredo, D.; Graciolli, G.; Aguiar, LMS. 2015. New records of bat flies (Diptera, Streblidae and Nycteribiidae) in Cerrado of Central Brazil. Check List, 11: 1761.). The scarcity of records in Brazil is likely related to the few records of their hosts in traditional bat surveys, since most Pteronotus bats are captured inside or when emerging from caves. Palheta et al. (2020Palheta, L.R.; Urbieta, G.L.; Brasil, L.S.; Dias-Silva, K.; Silva, J.B.; Graciolli, G.; Aguiar, L.M.S.; Vieira, T.B. 2020. The effect of urbanization on bats and communities of bat flies (Diptera: Nycteribiidae and Streblidae) in the Amazon, northern Brazil. Acta Chiropterologica, 22: 403-416.) recorded this fly species in Pará state, but, interestingly, on Carollia perspicillata and Lophostoma carrikeri (Allen, 1910), which are likely non-primary hosts.

Trichobius pallidus (Curran, 1934) (Figure 4j)

Material examined: n = 1 ♀ on a Furipterus horrens bat, cave S11C-0041, Canaã dos Carajás, 12/VII/2022, E. Barbier leg.

Remarks: A specific parasite of F. horrens, T. pallidus can be considered a rare species (Graciolli and Azevedo 2011Graciolli, G.; Azevedo, A.R. 2011. Ectoparasites of bats (Chiroptera, Furipteridae), with a description of a new species of Synthesiostrebla Townsend (Diptera, Streblidae) from Brazil. Revista Brasileira de Entomologia, 55: 501-504.). Here, it is recorded for the first time in the northern region of Brazil, and, consequently, for Pará state. Previous records in the country included the northeast and southeast regions (Graciolli and Azevedo 2011; Graciolli and Carvalho 2012Graciolli, G.; Carvalho, C.J.B. 2012. Do fly parasites of bats and their hosts coevolve? Speciation in Trichobius phyllostomae group (Diptera, Streblidae) and their hosts (Chiroptera, Phyllostomidae) suggests that they do not. Revista Brasileira de Entomologia, 56: 436-450.; Barbier et al. 2016Barbier, E.; Prado-Neto, J.G.; Bernard, E. 2016. Records of bat flies (Diptera: Nycteribiidae and Streblidae) in the semi-arid Caatinga in the state of Paraíba, Northeastern Brazil. Neotropical Entomology, 45: 740-745.). Furipterus horrens is a nationally threatened bat species in Brazil (MMA 2022MMA. 2022. Ministério do Meio Ambiente. Portaria MMA nº 148, de 7 de junho de 2022. Diário Oficial da União, Edição 108, Seção 1 ( Diário Oficial da União, Edição 108, Seção 1 (https://in.gov.br/en/web/dou/-/portaria-mma-n-148-de-7-de-junho-de-2022-406272733 ). Accessed on 23 Sep 2022.
https://in.gov.br/en/web/dou/-/portaria-...
).

Trichobius parasiticus Gervais, 1844 (Figure 4k)

Material examined: n = 10 (4 ♂ and 6 ♀ on a Desmodus rotundus bat), cave N5S-0052, Parauapebas, 16/VII/2022, E. Barbier leg.

Remarks: Like Strebla wiedemanni, T. parasiticus is a specific parasite of the common vampire bat, D. rotundus (Wenzel 1976Wenzel, R.L. 1976. The streblid batflies of Venezuela (Diptera: Streblidae). Brigham Young University Science Bulletin, Biological Series, 20: 1-177.), and, like its host, it has a wide distribution in South America. The occurrence of T. parasiticus on host species other than D. rotundus is considered a non-primary association (Barbier et al. 2021Barbier, E.; Falcão, F.; Bernard, E. 2021. Bat-ectoparasitic fly relationships in a seasonally dry tropical forest in Brazil. Parasitology Research, 120: 3507-3517.).

Trichobius uniformis Curran, 1935 (Figure 4l)

Material examined: n = 2 ♂ on a Glossophaga soricina bat, cave N5S-0057, Parauapebas, 16/VII/2022, E. Barbier leg.

Remarks: Although T. uniformis is known to occur in Brazil since the 1930s (Guimarães 1937Guimarães, L.R. 1937. Sobre as espécies sul americanas do gênero Trichobius (Diptera-Streblidae). Revista do Museu Paulista, 23: 653-666.), its presence in Pará state was only recently confirmed (Palheta et al. 2020Palheta, L.R.; Urbieta, G.L.; Brasil, L.S.; Dias-Silva, K.; Silva, J.B.; Graciolli, G.; Aguiar, L.M.S.; Vieira, T.B. 2020. The effect of urbanization on bats and communities of bat flies (Diptera: Nycteribiidae and Streblidae) in the Amazon, northern Brazil. Acta Chiropterologica, 22: 403-416.). Trichobius uniformis, along with T. dugesii, are the streblid species most often found parasitizing G. soricina (Barbier and Bernard 2017Barbier, E.; Bernard, E. 2017. From the Atlantic Forest to the borders of Amazonia: species richness, distribution, and host association of ectoparasitic flies (Diptera: Nycteribiidae and Streblidae) in northeastern Brazil. Parasitology Research, 116: 3043-3055.).

DISCUSSION

We recorded 14 streblid fly species, and provided three new species records for the state of Pará and two for the northern region of Brazil, in addition to the first record of Nycterophilia fairchildi for Brazil. Also, except for a single previous record of Strebla proxima parasitizing Peropteryx kappleri (Barbier et al. 2018Barbier, E.; Hintze, F.; Jardelino, A.C.; Bernard, E. 2018. First record of the bat ectoparasitic fly Strebla proxima Wenzel, 1976 (Diptera: Streblidae) from Brazil. Entomological News, 127: 369-374.), there was no information on bat ectoparasitic flies in the Carajás National Forest.

The majority of the streblid flies recorded here had a species-specific association, corroborating the findings of previous studies (e.g. Dick and Dittmar 2014Dick, C.W.; Dittmar, K. 2014. Parasitic bat flies (Diptera: Streblidae and Nycteribiidae): host specificity and potential as vectors. In: Klimpel, S.; Mehlhorn, H. (Ed.). Bats (Chiroptera) as Vectors of Diseases and Parasites. Springer, Berlin, p.131-155.; Barbier et al. 2019Barbier, E.; Graciolli, G.; Bernard, E. 2019. Structure and composition of Nycteribiidae and Streblidae flies on bats along an environmental gradient in northeastern Brazil. Canadian Journal of Zoology, 97: 409-418.). On the other hand, three species (Nycterophilia fairchildi, Trichobius caecus, and T. johnsonae) showed lower host specificity, being collected on two to three bat species of the genus Pteronotus. It is worth noting that, in the surveyed caves, different Pteronotus species often used the same chambers as roost, keeping colonies very close to each other and even forming mixed colonies (E. Barbier, personal observation). This roosting behavior has already been recorded in other caves in the Neotropical region (see Pavan 2019Pavan, A.C. 2019. Family Mormoopidae (ghost-faced, naked-backed and mustached bats). In: Wilson, D.E; Mittermeier, R.A. (Ed.). Handbook of the Mammals of the World: Bats . v.9. Lynx Edicions, Barcelona, p.424-443.). So, the frequent proximity between congener hosts over time may have facilitated the exchange of their streblid fly species. Furthermore, sheltering closely in perennial roosts such as caves has been pointed out as a possible important driver of host specificity in streblid flies (e.g. ter Hofstede and Fenton 2005ter Hofstede, H.M.; Fenton, M.B. 2005. Relationships between roost preferences, ectoparasite density and grooming behaviour of Neotropical bats. Journal of Zoology, 266: 333-340.).

The distribution range in Brazil of at least six streblid species reported in this study (N. fairchildi, N. parnelli, S. proxima, T. caecus, T. johnsonae, and T. pallidus) is little-known and these species can be considered rare. As an example, T. pallidus is a specific parasite for the nationally threatened cave bat F. horrens (the only known species of Furipteridae in Brazil). Some studies have indicated high host specificity as the factor most likely to directly influence the possibility of coextinction when hosts are threatened (e.g. Moir et al. 2010Moir, M.L.; Vesk, P.A.; Brennan, K.E.C.; Keith, D.A.; Hughes, L.; McCarthy, M.A. 2010. Current constraints and future directions in estimating coextinction. Conservation Biology, 24: 682-90.; Poulin et al. 2011Poulin, R.; Krasnov, B.R.; Mouillot, D. 2011. Host specificity in phylogenetic and geographic space. Trends in Parasitology, 27: 355-61.; Colwell et al. 2012Colwell, R.K.; Dunn, R.R.; Harris, N.C. 2012. Coextinction and persistence of dependent species in a changing world. Annual Review of Ecology, Evolution and Systematics, 43: 183-203.). Due to the unique association of T. pallidus with F. horrens, the conservation status of this streblid species is also of concern due to the threat level to its host. Therefore, assessing host specificity can be pointed out as a crucial step in assessing the risk of coextinction (Colwell et al. 2012).

Considering the importance of caves for dozens of bat species, and that all endangered bat species in Brazil are cave-dwelling (MMA 2022MMA. 2022. Ministério do Meio Ambiente. Portaria MMA nº 148, de 7 de junho de 2022. Diário Oficial da União, Edição 108, Seção 1 ( Diário Oficial da União, Edição 108, Seção 1 (https://in.gov.br/en/web/dou/-/portaria-mma-n-148-de-7-de-junho-de-2022-406272733 ). Accessed on 23 Sep 2022.
https://in.gov.br/en/web/dou/-/portaria-...
), it is urgent to improve the knowledge on these species, including basic parameters of host-parasite relationships such as parasite prevalence, abundance, and population structure.

CONCLUSIONS

In this study, we presented new records of streblid flies in a biodiversity-rich but undersampled region in northern Brazil, providing information on the geographic distribution and interspecific interaction of these ectoparasites and their host cave bats. Further studies that evaluate the interactions among cave bats and their ectoparasites in the context of ecological interaction networks will also be of great importance to shed light on questions about how such interactions are modulated in these unique environments, and what impact this has on both bats and parasites.

ACKNOWLEDGMENTS

We thank Narjara T. Pimentel for her invaluable help during the fieldwork. We are also grateful for the logistical support of the entire team at NGI-ICMBio-Carajás, FUNTEC-DF, and Vale S.A. We also thank the Laboratório Avançado de Microscopia e Imagem, at Museu de Zoologia, Departamento de Zoologia, Universidade Federal de Pernambuco (LAMI-UFPE) (Brazil), Fundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco - FACEPE (Brazil) (proc. # APQ-0522/2.04/19), and Emerson G. Dias for his help in obtaining images of the fly specimens. This study was financed in part by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES (Brazil) - Finance Code 001. E. Barbier is supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico - CNPq (Brazil) through a postdoctoral fellowship (proc. # 152672/2022-2). E. Bernard has a research productivity grant from CNPq. We thank Dr. Claudia Keller and two anonymous reviewers for their constructive and valuable comments on an earlier version of the manuscript.

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  • 2
    CITE AS: Barbier, E.; Bernard, E. 2023. Streblid flies parasitizing cave bats in Carajás, Amazonia, with a new record for Brazil. Acta Amazonica 53: 122-129.

Edited by

ASSOCIATE EDITOR: Paulo D. Bobrowiec

Publication Dates

  • Publication in this collection
    28 Apr 2023
  • Date of issue
    Apr-Jun 2023

History

  • Received
    15 Dec 2022
  • Accepted
    02 Feb 2023
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