Trichomyia pantanensis, Araújo & Bravo & Carvalho, 2017

Araújo, Maíra Xavier, Bravo, Freddy & Carvalho, Claudio José Barros de, 2017, Two new species of Trichomyia Haliday 1839 (Diptera, Psychodidae, Trichomyiinae) from the Pantanal of Mato Grosso, Brazil, Revista Brasileira de Entomologia 61 (3), pp. 203-207 : 206

Trichomyia pantanensis sp. nov.

Diagnosis. Palpus four-segmented. Gonocoxite with pilose internal lobe. Gonostylus bifurcated and aedeagus bifid.

Description. Male. Head subcircular ( Fig. 11 ). Antenna with subcylindrical scape shorter than subspherical pedicel; flagellomeres pyriform and eccentric ( Fig. 17 ); 13th flagellomere subcylindrical with terminal apiculus separated by suture ( Fig. 13 ); ascoids 1.35 times flagellomere length. Palpus four-segmented, with first two segments partially fused; palpus formula 1.0:0.5:0.8:1.5, first and second segment with sensilla in depressed pits on the inner side ( Fig. 14 ). Wing. Apex of Sc sclerotized; R 4+5 complete at base; rm and m-cu absent ( Fig. 12 ). Male terminalia: Hypandrium fused with gonocoxites ( Fig. 19 ). Gonocoxite projects ventrally with a pilose internal lobe ( Figs. 15, 19 ). Gonostylus bifurcated apically, slightly sclerotized, articulated to the apex of the gonocoxite, bare, curved and with pointed apices. Aedeagus bifid. One pair of membranous parameres ( Fig. 19 ). Epandrium wider than long in dorsal view and bare ( Fig. 18 ). Cercus pilose, abruptly constricted before apex in lateral view ( Fig. 15 ). Hypoproct with apical micropilosity ( Fig. 18 ).

Material examined. Brazil, Mato Grosso, Poconé , 15–17.VII.2012, holotype male, A.M. Silva-Neto leg. ( MZFS); 7 paratypes male , same locality, date and collector as holotype ( MZSP); 21 paratype males , Mato Grosso, Barão de Melgaço , 7.IV.1998, without name of collector ( MZFS); 1 paratype male , Mato Grosso, Barão de Melgaço , Pantanal, 10.IV.1998, INPA R .Q., R.N./P.E. legs., without name of collector.

Etymology. The epithet pantanensis refers to the region (the Pantanal) in which the new species commonly occurs.

Distribution. Known from Poconé in the Brazilian state, Mato Grosso.

Remarks. Trichomyia pantanensis is placed in the subgenus Opistotrichomyia Bravo, 2001 because it has the palpus four-segmented with the first two partially fused, the gonocoxite projected ventrally with an internal lobe having elongated bristles and gonostylus articulate apically to the gonocoxite. However, its aedeagus is shorter than that of T. brevitarsa (Rapp, 1945) and longer than that of T. riodocensis Alexander, Freitas & Quate, 2001 . The gonostylus is bifurcated as in T. festiva Bravo, 2001 and T. riodocensis , but the gonostylus of T. festiva has truncate apex. T. fluminensis Bravo, 2001 and T. nocturna Bravo, 2001 have not gonostylus bifurcated and the internal lobe is shorter than that of T. pantanensis .

Figures

Figs. 11–19. Trichomyia pantanensis sp. nov. 11. Head; 12. Left wing; 13. Last flagellomeres, 14. Palpus; 15. Male terminalia, lateral; 16. Parameres and aedeagus; 17. Scape, pedicel and basalflagellomeres;18.Cerci,epandriumand hypropoct;19.Male terminalia,dorsal (abbreviations:aed =aedeagus,cer =cercus,gst = gonostylus,hyp =hypoproct, il= internal lobe, pm =paramere).