Trichomyia lamasi, 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 : 203-205

Trichomyia lamasi sp. nov.

Diagnosis. Apex of gonocoxites rounded and with bristles. One pair of parameres fused basally and involved by a membranous parameral sheath. Hypoproct pyriform with setulae.

Description. Male. Head ellipsoidal ( Fig. 1 ). Antenna incomplete in the studied specimens; scape the same length as subspherical pedicel; flagellomeres pyriform and eccentric ( Fig. 6 ); ascoids 1.75 times flagellomere length. Palpus formula 1.0:0.5:0.7; 1st segment with sensilla in depressed pit on inner side ( Fig. 3 ). Wing. R 4+5 complete at base; r-m present and m-cu absent ( Fig. 2 ).

Male terminalia: Hypandrium fused with gonocoxites, with medial posterior expansion, bifurcate ( Fig. 9 ), each pair of arm of gonocoxite with rounded apex and elongated bristles along the internal margin ( Figs. 4, 5, 9 ). Gonostylus elongated and straight in dorsal view. One pair of parameres present, with apical setae, enclosed in a membranous parameral sheath ( Figs. 7, 8 ). Aedeagus bifid. Ejaculatory apodeme 0.75 times the length of parameres ( Fig. 9 ). Epandrium trapezoidal and pilose, with some alveoli concentrated at the apicolateral margins. Cercus rounded and pilose. Hypoproct pyriform with setulae and apical micropilosity ( Fig. 10 ).

Material examined. Brazil, Mato Grosso, Poconé, 15-17.VII.2012, holotype male, A.M. Silva-Neto leg. (MZFS); 2 paratypes: 1 male, Mato Grosso, Chapada dos Guimarães, 5.X.1997, without name of collector. ( MZSP) ; 1 male, Mato Grosso, Chapada dos Guimarães, 17.XI.1998, without name of collector ( MZSP) .

Etymology. The species is named in honor of Dr. Carlos José Einicker Lamas, curator of Diptera in the Museu de Zoologia da Universidade de São Paulo, and general coordinator of the SISBIOTA Diptera project under which specimens were collected.

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

Remarks. Trichomyia lamasi sp. nov. does not have any diagnostic characteristics of the currently named subgenus of Trichomyia . The species does resemble those identified in the “truncata group” described in Araújo and Bravo (2016). The shape of the arm of gonocoxite of T. lamasi is similar to those in T. truncata Araújo & Bravo, 2016 , T. manacapurensis Araújo & Bravo, 2016 and T. cinthiae Araújo & Bravo, 2016 . However, the gonostylus is more elongate and thinner in T. lamasi . On the other hand, the shape of paramere is similar as T. nortensis Araújo & Bravo, 2016 (=projections of aedeagal complex, according Araújo and Bravo, 2016), a species not included in the “truncata group”. The setulae of the hypoproct, which is one of the diagnostic characters of T. lamasi , is also found in T. manacapurensis , T. truncata and T. nortensis .

Figures

Figs. 1–10. Trichomyia lamasi sp. nov.1. Head; 2. Left wing; 3. Palpus; 4.Arm of gonocoxite; 5. Male terminalia, lateral; 6. Scape, pedicel and basal flagellomeres; 7.Aedeagus and parameres, dorsal; 8. Parameres, ventral view; 9. Male terminalia, dorsal; 10. Cerci, epandrium and hypropoct (abbreviations: aed= aedeagus, ag =arm of gonocoxite, bri =gonocoxal bridge, cer= cercus, gst= gonostylus, hyp =hypoproct, pm= paramere, she =parameral sheath).