Trichomyia gustavoi, Araújo & Dos Santos & Bravo & de Carvalho, 2017

Araújo, Maíra Xavier, Dos Santos, Claudiney Biral, Bravo, Freddy & de Carvalho, Claudio J. B., 2017, Four new species of the genus Trichomyia - subgenus Septemtrichomyia Bravo (Diptera: Psychodidae: Trichomyiinae) from Brazil, Journal of Natural History 51 (29 - 30), pp. 1713-1725 : 1719-1721

Trichomyia gustavoi sp. nov.

( Figure 4 (a–i))

Diagnosis

Elongate bristles on tergum VII with curved apices. Gonocoxite posterior arm with apex acute, apically pilose with row of 12 small, rod-like setae. One pair of triangular parameres present. Ejaculatory apodeme 0.8 times gonostylus length.

Description

Adult male. Head subcircular ( Figure 4 (a)). Antenna incomplete in studied specimens; scape longer than pedicel; scape subcylindrical and pedicel subespherical; basal flagellomeres pyriform and eccentric; ascoid 1.5 times the length of flagellomere ( Figure 4 (g)). Palpus three-segmented; first segment with sensilla in depressed pit on inner side; palpus formula 1.0:0.8:0.8 ( Figure 4 (c)). Wing ( Figure 4 (b)): Sc complete, with micropilosity; R4 + 5 complete at base; r-m and m-cu absent. Elongate bristles of tergum VII with curved apices ( Figure 4 (d)). Male terminalia: hypandrium fused with gonocoxite. Gonocoxite with posterior arm curved to the midline, apex acute, apically pilose with row of 12 small, rod-like setae. Gonostylus digitiform with apex curved upwards ( Figure 4 (e,h)). One pair of triangular and sclerotised parameres present, aedeagus bifid and convergent. Medial and basal expansion of gonocoxite lanciform. Ejaculatory apodeme short, 0.8 times the length of gonostylus. ( Figure 4 (h)). Epandrium pilose longer than wide, trapezoidal ( Figure 4 (i)). Cercus pilose, pyriform in ventral view, wide in lateral view, taller than epandrium and with hairs in dorsal view ( Figure 4 (f)). Hypoproct with rounded apex and apical micropilosity ( Figure 4 (i)).

Material examined

Holotype ♂, BRAZIL, Espírito Santo, Brejetuba ( Córrego do Café ), 26 September 2010, G. R. Leite leg. ( MZFS); 17 paratypes: 8 ♂, same locality, date and collector as holotype ( MZFS); 9 ♂, Espírito Santo, Aracruz (Reserva Biológica Aricanga), 9–11 January 2008, G. R. Leite leg. ( DZUP).

Distribution

Brazil (Espírito Santo).

Etymology

Named in honour of Prof. Dr Gustavo Rocha Leite who collected the material used in this study.

Remarks

Trichomyia gustavoi is similar to T. pedrabranquensis Bravo, 2001 and T. atlantica . Trichomyia gustavoi differs from T. atlantica in the size of the aedeagal apodeme, and the shapes of the gonocoxite arm and cercus. Trichomyia pedrabranquensis has a medial and basal expansion of the gonocoxite (as does T. gustavoi ), but in T. pedrabranquensis the bifurcation is lanciform and more tapered.

Figures

Figure 4. (a–i) Trichomyia gustavoi sp. nov. (a) Head; (b) right wing; (c) palpus; (d) tergum VII; (e) male terminalia, lateral; (f) cercus, in dorsal view; (g) scape, pedicel and basal flagellomeres; (h) male terminalia, dorsal; (i) cerci, epandrium, hypoproct. Abbreviations: agx = arm of gonocoxite, cer = cercus, ep = epandrium, gst = gonostylus, pm = paramere.