Trichomyia uncata 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 : 440

Trichomyia uncata Rossito, Andrade & Pinho sp. nov.

( Fig. 5A–F ; 6G–H )

Type material. Holotype: ♂. BRAZIL. Santa Catarina State. São Francisco do Sul. CEPA Vila da Glória. 26°13’40”S, 48°40’50”W. 13–17.II.2020 #146. Shannon trap. L.C Pinho et al. ( DZUP) . Paratype: 1 ♂ BRAZIL. Santa Catarina State. Santo Amaro da Imperatriz. Hotel Caldas da Imperatriz. 27°43’49”S, 48°48’38”W. 8–10.VIII.2017. CDC light trap. L.C. Pinho et al. ( CE-MHS)

Etymology. The name is derived from the latin adjective uncatus (hooked), due to the hooked setae on the arm of the gonocoxite.

Diagnosis. The species can be separated from all other Neotropical Trichomyia by the following combination of characters: Hypandrium “plate-like”, without expansions; gonocoxite with two arms, and both arms bearing setae; shorter arm of the gonocoxite with strong “hook-shaped” setae; cercus oval and without differentiated setae

Description. Male holotype: Head ( Fig. 5A ) wider than long (432–293), with a row of five supraocular setae. Two pairs of supra-cervical setae. 15–16 occipital setae. Clypeus wider than long (46–64). Antenna incomplete. Flagellomeres ( Fig. 5A, B ) piriform and united eccentrically. Simple setae absent in all flagellomeres. FI the same length as FII. Ascoids inserted at the base of flagellomeres, both at the same level; ascoid simple, curved and long, reaching the ascoid insertion in the next flagellomere. Palps ( Fig. 5C ) with three segments. Length: PI (58), PII (43) and PIII (46).

Wing ( Fig. 5D ) longer than wide (1350–684). 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 not reaching the wing margin at the middle point of R 2.

Thorax ( Fig. 6G ). Mesonotum light brown, coxa and paratergite pale, not contrasting, Posterior half of the scutellum with setae. Anepisternal setae present. Distal margin of the anterior coxa with a group of long setae. Distal margin of the posterior coxa with an anterior projection, with truncate apex and an apical row of setae. Legs length as in Table 4.

Genitalia ( Figs. 5E–H ; 6H ). Hypandrium ( Fig. 5E ) not clearly fused with gonocoxite, plate-like, without expansions. Gonocoxite ( Fig. 5 – F ) with two arms and a lobe in the internal margin, near the base of the arm, covered by setae, with hirsute aspect. Internal arm shorter than the external and with 2–3 strong hook-like setae at the apex. External arm curved, convergent, with four long setae, the apical two shorter than the basal ones and semi-foliaceus, apex three strong setae. Gonostylus ( Fig. 5E ) ventrally articulated with the gonocoxite, lightly sclerotized, without setae, narrow and slightly sinuous with dilated apex. Parameres ( Fig. 5G ) heavily sclerotized, branched and with divergent apexes; medial branch directed towards the center, with dilated apex and secondarily branching medially; Aedeagus ( Fig. 5G ) with a narrow and long base, similar in size to the ejaculatory apodeme, expanded apex connected to the parameres, interconnected by a membranous structure. Ejaculatory apodeme straight and narrowing towards the base (98). Sperm sac not discernible. Epandrium ( Fig. 5H ) sub rectangular (116–89) Cerci ( Fig. 5H ) round and shorter than the external arm of the gonocoxite, without differentiated setae. Hypoproct was not discernible.

Female. Unknown.

Distribution. Brazil, state of Santa Catarina.

Figures

FIGURES 5A–G. Trichomyia uncata sp. nov. A. Head. B. First and second flagellomeres. C. Palpus. D. Wing. E. Gonostyle and Hypandrium, dorsal view, one of the arms of the gonocoxite dashed. F. Gonocoxite in dorsal view. G. Aedeagus and Parameres. H. Cerci and Epandrium. (abbreviations: Gs = Gonostyle, Hp = Hypandrium, Sfs = semi-foliaceus setae). (Bar: 100 µm; except for D, 500 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.