Trichomyia aculeata 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 : 436

Trichomyia aculeata Rossito, Andrade & Pinho sp. nov.

( Fig. 3A–F ; 6C–D )

Type material. Holotype ♂. BRAZIL. Santa Catarina State. Grão Pará. Serra Furada State Park. 28°09’07”S, 49°23’18”W. 16.XI.2012 – 08.I.2013. Malaise #28. L.C. Pinho, M.C. Novaes & M.F. Haddad leg. ( DZUP) . Paratypes: 3 ♂ same data as Holotype ( DZUP; CE-MHS) .

Etymology. The name is derived from the latin adjective aculeatus (spiny), due to the spine-like strong setae on the arm of the gonocoxite.

Diagnosis. The species can be separated from all other Neotropical Trichomyia by the following combination of characters: arm of the gonocoxite short in dorsal view and with strong setae resembling a spine; Parameres with sub-triangular base, with a lobe in the external margin and rounded apexes; aedeagus long, ending beyond the apexes of the parameres.

Description. Male holotype: Head ( Fig. 3A ) wider than long (413–292), with a row of five supra-ocular setae. Two pairs of supra-cervical setae. 18–19 occipital setae. Clypeus wider than long (69–46). Antenna complete with thirteen flagellomeres and an apiculus ( Fig. 3C ). Flagellomeres ( Fig. 3A–B ) pyriform and united eccentrically. Simple setae absent in all flagellomeres. FI the same length as FII.Ascoids lost in holotype, described as in paratypes: 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. 3D ) with three segments. Length: PI (46), PII (31) and PIII (37).

Wing ( Fig. 3E ) too clear in holotype, described as in paratypes: longer than wide (1480–647). r-m and m-cu not visible. 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 not reaching the wing margin at the middle point of R 2 .

Thorax ( Fig. 6C ). Mesonotum light brown, coxa and paratergite pale, not contrasting; posterior half of the scutellum with setae; anepisternal setae present; distal margin of the metacoxa with an anterior projection, with truncate apex and an apical row of setae. Length of leg segments given in Table 2 .

Genitalia ( Figs. 3F–H ; 6D ). Hypandrium ( Fig. 3F ) fused with gonocoxite, with a pair of membranous, sub-triangular expansions with an acute apex. Gonocoxite ( Fig. 3F ) with an arm and a lobe in the internal margin, with three elongated and fine setae. Arm of the gonocoxite short in dorsal view, less than 0.3 the length of the ejaculatory apodeme, apex with long setae and an apical expansion, from where arise long and sclerotized setae, with the appearance of a spine. Gonostylus ( Fig. 3F ) ventrally articulated with the gonocoxite, lightly sclerotized, without setae, sub-triangular and with rounded apex. Parameres ( Fig. 3F ) with sub-triangular base and a lobe in the external margin, apices round and ending beyond the arm of the gonocoxite. Aedeagus ( Fig. 3G ) long, ending beyond the apices of the projections of the parameres. Ejaculatory apodeme straight and narrowing towards the base (104). Sperm sac oval. Epandrium ( Fig. 3H ) wider than long (127–104), sub-rectangular. Cerci ( Fig. 3H ) sub-triangular and curved dorsally cerci with apical expansion, where thick rod-like setae are inserted. Hypoproct ( Fig. 3H ) with apical micropilosity and rounded apex.

Female. Unknown.

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

Figures

FIGURES 3A–G. Trichomyia aculeata sp. nov. A. Head. B. First and second flagellomeres, drew from paratype. C. XIII flagellomere and apiculus. D. Palpus. E. Wing. F. Gonocoxite, Gonostyle, Hypandrium, Parameres and Aedeagus, dorsal view. G. Aedeagus. H. Cerci, Epandrium and Hypoproct. (abbreviations: He = hypandrial expansions, Pm = paramere). (Bar: 100 µm; except for D, 500 µm and C, 50 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.