Trichomyia brisolai Rossito, Andrade & Pinho, 2024

Rossito, Lucas, Andrade, Andrey J. & Pinho, Luiz Carlos, 2024, Trichomyia Haliday in Curtis (Diptera: Psychodidae) from southern Brazil: four new species and seven new records, Zootaxa 5536 (3), pp. 432-446 : 433-434

Trichomyia brisolai Rossito, Andrade & Pinho sp. nov.

( Figs. 1A–D ; 2A–D ; 6A–B )

Type material. Holotype ♂. BRAZIL. Santa Catarina State. Florianópolis. Pantanal neighborhood. 27°36’33”S, 48°30’44”W. V.2018. CDC light trap. R. Silva, L. Rossito & L.C. Pinho leg. ( DZUP).

Etymology. The name honors Prof. Dr. Carlos Brisola Marcondes, who introduced the fascinating world of dipterology to LR and LCP, for his important contributions to the knowledge on diversity of Psychodidae .

Diagnosis. The species can be separated from all other Neotropical Trichomyia by the following combination of characters: simple setae present at least in flagellomeres I, V and VI; mesonotum and coxa dark, contrasting with pale paratergite; arm of the gonocoxite subtriangular, sclerotized and inclined 45 degrees, with a “comb-like” projection on the ventral surface and strong setae present on the dorsal surface.

Description. Male: Head ( Fig. 1A ) wider than long (446–316), with a row of five to six supra-ocular setae. Two pairs of supra-cervical setae. 15–16 occipital setae. Clypeus wider than long (92–55), anterior margin curved. Mouth parts short, not reaching the apex of the first flagellomere (FI), teeth of hypopharynx clearly delimited. Scape sub-rectangular and pedicel sub-spherical. Antenna incomplete. Flagellomeres ( Fig. 1A–B ) pyriform, united eccentrically. Simple setae present in FI, FV and FVI. FI the same length as FII. Pair of ascoids inserted at the base of flagellomeres, both at the same level; ascoids simple, curved and long, reaching the ascoid insertion in the next flagellomere. Palpus ( Fig. 1C ) with three segments. Length: PI (63), PII (43) and PIII (43). First segment with a pit on the internal margin, with hyaline sensilla inserted.

Wing ( Fig. 1D ) longer than wide (1600–777). r-m and m-cu absent. Rs branching near the level of the apex of Sc. Base of R 4+5 not sclerotized. Apex of CuA 2 reaching the wing margin at the same level as the M-fork. Apex of CuA 1 reaching the wing margin at the same level as the R-fork. Apex of R 1 reaching the wing margin at the middle point of R 2.

Thorax ( Fig. 2A ; 6A ) Mesonotum and coxa dark, not contrasting, paratergite pale. Scutellum with medial band of setae. Anepisternal setae present. Distal margin of the metacoxa ( Fig. 2A , arrowed) with an anterior projection, with truncate apex and an apical row of setae. Length of leg segments given in Table 1 .

Genitalia ( Figs. 2B, C, D ; 6B ). Hypandrium ( Fig. 2B ) fused with gonocoxite, with a pair of membranous, sub-triangular expansions with rounded apex. Gonocoxite ( Fig. 2B ) with one distal arm; arm of the gonocoxite sclerotized, sub-triangular, inclined 45 degrees; dorsal surface with internal setae and a row of strong setae in the external margin; ventral surface with a projection; internal margin of projection appearing comb-like. Gonostylus ( Fig. 2B ) ventrally articulated with the gonocoxite, lightly sclerotized, without setae and with curved apex. Parameres ( Fig. 2C ) present as a pair of narrow, sub-triangular and sclerotized structures, base wider than apex and a protuberance in the basolateral margin, slightly sinuous and with divergent apices. Aedeagus ( Fig. 2C ) with sub-triangular base, expanded externally, straight, ending at the same level as the apexes of parameres. Ejaculatory apodeme straight and narrowing towards the base (136). Sperm sac oval. Epandrium ( Fig. 2D ) wider than long (159–69), trapezoidal. Cerci ( Fig. 2D ) sub-triangular, internal margin curved and with elongated setae around the edge. Apical expansion with semi-foliaceous setae. Hypoproct ( Fig. 2D ) triangular, with apical micropilosity and ending in an acute apex.

Female. Unknown.

Distribution. Brazil, state of Santa Catarina. Known only from type locality.

Figures

FIGURES 1A–D. Trichomyia brisolai sp. nov. A. Head. B. First and second flagellomeres. C. Palpus. D. Wing. (abbreviations: Ss = simple setae). (Bar: 100 µm; except for D, 500 µm).

FIGURES 2A–D. Trichomyia brisolai sp. nov. A. Thorax, arrow indicating the projection in the metacoxa. B. Gonocoxite, Gonostyle and Hypandrium, dorsal and ventral view represented. C. Aedeagus and Parameres. D. Cerci, Epandrium and Hypoproct. (abbreviations: Clp = comb-like projection, Gs = gonostyle, He = Hypandrial expansions, Pm = parameres). (Bar: 100 µm).

FIGURES 6A–H. Trichomyia brisolai sp. nov. A. Thorax. B. Genitalia in dorsal view. Trichomyia aculeta sp. nov. C. Thorax. D. Genitalia in dorsal view. Trichomyia marumbi sp. nov. E. Thorax. F. Genitalia in dorsal view. Trichomyia uncata sp. nov. G. Thorax. H. Genitalia in dorsal view.