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Zoologia (Curitiba)

Print version ISSN 1984-4670

Zoologia (Curitiba) vol.29 no.5 Curitiba Oct. 2012

https://doi.org/10.1590/S1984-46702012000500009 

TAXONOMY AND NOMENCLATURE

 

A new species of Bruchomyia (Diptera: Psychodidae) from caverns in the state of Minas Gerais, Brazil

 

 

Freddy BravoI,*; Ricardo Andrade BarataII

IUniversidade Estadual de Feira de Santana, Departamento de Ciências Biológicas. Avenida Transnordestina, 44036-900 Feira de Santana, BA, Brazil
IIDepartamento de Ciências Biológicas, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Campus JK. Rodovia MGT 367, km 583, 5000, Alto da Jacuba, 39100-000 Diamantina, MG, Brazil

 

 


ABSTRACT

Nine Neotropical species of Bruchomyia Alexander, 1920 have been previously described, all from South America. A new species of this rare genus, collected in caverns of the state of Minas Gerais, southeastern Brazil, is described and named Bruchomyia mineira sp. nov. The new species is morphologically similar to B. argentina Alexander, 1920, but they can be differentiated from each other by characters of the eyes, M2 vein and base of gonostylus.

Key words: Bruchomyiinae; moth flies; Neotropical region; Psychodidae; taxonomy.


 

 

Bruchomyia Alexander, 1920 is a Neotropical genus of Bruchomyiinae (Psychodidae) known only from South America. Nine species have been described; one, Bruchomyia peruviana Alexander, 1929 is known only from females, despite the fact that the taxonomy of the genus is based on characteristics of the male, and no characters useful for distinguishing among females of Bruchomyia have been identified (QUATE et al. 2000).

According to QUATE et al. (2000), specimens of Bruchomyia are rarely collected. Eight species were described between 1920-1950: B. argentina Alexander, 1920 (the type species of the genus); B. peruviana; B. shannoni Alexander, 1929; B. brasiliensis Alexander, 1940; B. plaumanni Alexander, 1944; B. almeidai Barretto & d'Andreatta, 1946; B. fusca Barretto, 1950; and B. unicolor Barretto, 1950 (ALEXANDER 1920, 1929, 1940, 1944, BARRETTO & D'ANDREATTA 1946, BARRETTO 1950). The ninth known species, B. andina Quate, Pérez & Ogusuku, 2000, was described fifty years after B. unicolor. A recent synopsis of the genus was given by QUATE et al. (2000). In this paper we describe a new species of Bruchomyia collected from caverns in the state of Minas Gerais, southeastern Brazil.

 

MATERIAL AND METHODS

Specimens of Bruchomyia were collected with modified CDC light traps in caverns and preserved in 70% ethanol, cleared with hot 10% sodium hydroxide and mounted in Canada balsam. The caverns are located in the municipality of Diamantina, state of Minas Gerais. The terminology for the morphological descriptions follows mainly MERZ & HAENNI (2000). Specimens (including the types) are deposited in Coleção Entomológica Prof. Johann Becker do Museu de Zoologia da Universidade Estadual de Feira de Santana, Brazil (MZFS) and Museu de Zoologia da Universidade de São Paulo, São Paulo, Brazil (MZSP).

 

TAXONOMY

Bruchomyia Alexander

Bruchomyia Alexander, 1920: 403. Type species: B. argentina Alexander (original designation). Additional references: Alexander, 1929: 2; Barretto, 1950: 66-67; Fairchild, 1952: 274; Quate et al., 2000: 1045; Williams, 2003: 8 (species list).

Diagnosis: Bruchomyia is characterized by the presence of 26-30 flagellomeres, long CuA2, and gonocoxite with a tubercle on the medial surface bearing a dense cluster of heavy setae (QUATE et al. 2000).

Bruchomyia mineira sp. nov.
Figs 1-13

Diagnosis. Eyes separated by 3.5 facet diameters; antenna with 30 flagellomeres; flagellomeres 2+3 combined 1.2-1.5 x length of flagellomere 1; vein Sc ending before level of radial fork; base of Rs with spur; M2 incomplete; hypandrium sclerotized, hat-shaped, sculptured above; cluster of long setae absent at base of gonostylus; aedeagal apodeme longer than gonocoxite.

Description. Male. Abdomen cylindrical, legs twice the length of abdomen (Fig. 1). Antenna 5.0 x length of head (Fig. 2) and approximately the same length of wing. Head longer than wide (Fig. 3). Length from thorax to the posterior end of terminalia: 4.1-4.7 mm (n = 7). Wing length: 3.2-4.2 mm (n = 7). Eyes separated by 3.5 facet diameters; frontal area with 18-20 setae alveoli. Frontal area with 17 setae alveoli. Antenna with 30 flagellomeres (observed in two paratypes, Fig. 2); basal flagellomeres cylindrical (Figs 4 and 5); length of flagellomeres 2+3 combined 1.2-1.5 x length of flagellomere 1 (Fig. 4); first flagellomere of three paratypes with medial incision (Fig. 5); flagellomeres decreasing in length toward the apex (Fig. 6); last flagellomere with apiculus (Fig. 6); ascoids mushroom-shaped (Fig. 4, asc). Palpus formula (1+2:3:4:5) = 1.0:1.0:1.1:3.7; sensilla absent on second and third palpomeres; last palpomere striated (Figs 2, 7). Fore, mid and hind coxae longer than wide (Fig. 8). Wing (Fig. 9) with Sc ending before level of radial fork, reaching C, apex faint; crossvein sc-r faint; radial fork a little distal to medial fork; base of R5 with spur; crossvein r-m faint; M2 incomplete, not reaching M1. Halteres club-shaped, as long as fore coxa (Fig. 8). Segment VIII twisted 90º about the long axis of the abdomen (Fig. 10). Male terminalia: hypandrium sclerotized, hat-shaped (internal margin expanded medially), sculptured superiorly (Fig. 11); gonocoxite with two lobes, medial lobe larger than distal, both with cluster of spines (Fig. 11); medial lobe of gonocoxite separated from distal lobe by distance at least equal to width of medial lobe (Fig. 11); gonostylus smaller than gonocoxite, with apex bifurcate in form of pincers; bifurcations of gonostylus longer than base (Figs 11 and 12); aedeagus tubular with single external opening (Fig. 11); parameres fused medially forming a conic parameral sheath (Fig. 11); aedeagal apodeme longer than the length of gonocoxite, trumpet-like (Figs 10 and 12). Epandrium rectangular (Fig. 13). Cerci smaller than gonocoxite (Figs 10 and 12). Tergite 10 lobe-like (Fig. 11).

Female. Unknown.

Material examined. Holotype male, BRAZIL, Minas Gerais: Diamantina, cavern of Salitre (18º16'47"S, 43º32'10"W), 18.V.2010, Barata, R.A. leg. (MZFS).

Paratypes: 7 males, same locality, date and collector as holotype; 1 male, same locality and collector as holotype, 30.VI.2011; Minas Gerais, Diamantina, cavern Monte Cristo (18º17'49"S; 43º33'30"W), Barata, R.A. leg.: 5 males, 26.V.2011; 1 male, 30.V.2011; 4 males, 30.VI.2011; 4 males, 13.VII.2011. Paratypes are deposited in MZFS and MZSP.

Etymology. The specific epithet, mineira, refers to the state where the material of the new species was collected.

Type locality. The two caverns are located at the municipality of Diamantina, state of Minas Gerais: cavern Monte Cristo and cavern of Salitre. They are situated 10 km apart from the city of Diamantina. These caverns were formed in quartzite rocks of the Espinhaço mountain range and are predominantly horizontal with many fallen boulders, have two entrances, sandy soils, and perennial water sources.

Comments. The new species keys out as B. argentina in the key to males of Bruchomyia provided by QUATE et al. (2000). The following couplets lead to B. argentina: 1) gonocoxite with two clusters of spines, distal cluster smaller than medial (step 1); 2) vein Sc ending before level of radial fork (step 2); 3) base of Rs with spur (step 5); 4) flagellomeres 2+3 combined 1.3-1.5 x length of flagellomere 1 (step 6). However, the morphological differences outlined below have allowed us to separate B. mineira from B. argentina.

The new species is morphologically similar to B. argentina but can be differentiated by the following set of characters: 1) eyes separated by two facet diameters in B. argentina and 3.5 facet diameters in the new species; 2) M2 complete in B. argentina (ALEXANDER 1920: Fig. 2), incomplete in the new species (Fig. 9); 3) base of gonostylus with cluster of setae alveoli on the dorsal surface in B. argentina (QUATE et al. 2000: Fig. 9), absent in the new species. According to ALEXANDER (1920), the R5 vein of B. argentina has a spur at the base; however, QUATE et al. (2000) did not find this spur on the three paratypes examined (the holotype was lost) and, therefore, assumed that the spur is lacking from the base of the R5 of this species. The presence of a spur in the new species could be another difference between it and B. argentina. The new species differs from B. peruviana, a species known only from females (ALEXANDER 1929), by the number of flagellomeres: 30 in B. mineira and 27 in B. peruviana.

As noted by FAIRCHILD (1952), the current distribution of Bruchomyia in the Neotropics is restricted to South America, with records from three countries: Argentina with one species (B. argentina); Peru, with three Andean species collected above 2,100 m a.s.l. (B. andina, B. shanonni and B. peruviana); and Brazil, with six species (B. almeidai from the state of São Paulo, B. brasiliensis from the states of Ceará and Mato Grosso, B. fusca from the states of São Paulo and Rio de Janeiro, B. mineira sp. nov. from Minas Gerais, B. plaumanni from the state of Santa Catarina, B. unicolor from São Paulo). Certainly, the richness of Bruchomyia is underestimated and the distribution of the included species may be broader than currently known.

 

ACKNOWLEDGMENTS

F.B. is grateful to CNPq for the financial support (471199/ 2009-5) and fellowship (302120/2009-2).

 

LITERATURE CITED

ALEXANDER, C.P. 1920. A new subfamily of tanyderid flies. Annals of the Entomological Society of America 13(4):402-407.         [ Links ]

ALEXANDER, C.P. 1929. A revision of the American two-winged flies of the Psychodid subfamily Bruchomyiinae. Proceedings of the United States National Museum 75:1-9.         [ Links ]

ALEXANDER, C.P. 1940. Further observations on the psychodid subfamily Bruchomyinae (Diptera). Revista de Entomologia 11(3):793-799.         [ Links ]

ALEXANDER, C.P. 1944. Two undescribed species of psychodid Diptera from Tropical America. Revista de Entomologia 15(3):313-317.         [ Links ]

BARRETTO, M.P. 1950. Contribuição para o estudo dos Bruchomyinae brasileiros, com as descrições de duas novas espécies (Diptera, Psychodidae). Papéis Avulsos de Zoologia 9:341-350.         [ Links ]

BARRETTO, M.P. & M.A.V. D'ANDRETTA. 1946. Observações sobre a subfamília Bruchomyinae Alexander, 1920, com a descrição de quatro novas espécies (Diptera: Psychodidae). Livro de Homenagem a Romualdo Ferreira d'Almeida 6:55-76.         [ Links ]

FAIRCHILD, G.B. 1952. Notes on Bruchomyia and Nemopalpus (Diptera: Psychodidae). Annals of the Entomological Society of America 45(2):259-328.         [ Links ]

MERZ, B. & J.P. HAENNI. 2000. Morphology and terminology of adult Diptera (other than terminalia), p. 21-51. In: L. PAPP & B. DARVAS (Eds). Contributions to a Manual of Palaearctic Diptera. Budapest, Science Herald, vol. 1, 978p.         [ Links ]

QUATE, L.W.; J.E. PÉREZ & E. OGUSUKU. 2000. Synopsis of Neotropical Bruchomyia (Diptera: Psychodidae: Bruchomyiinae) with description of one new species. Annals of the Entomological Society of America 93(5):185-193.         [ Links ]

WILLIAMS, P. 2003. Notes on the subfamily Bruchomyiinae (Diptera: Psychodidae). Lundiana 4(1):5-11.         [ Links ]

 

 

Submitted: 23.III.2012; Accepted: 26.VII.2012.
Editorial responsibility: Gabriel L.F. Mejdalani

 

 

* Corresponding author. E-mail: fbravo@uefs.br

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