Trichomyia trukensis Quate, 1959

Araújo, Maíra Xavier & Bravo, Freddy, 2024, A contribution to the knowledge of Trichomyia Haliday in Curtis, 1839 (Diptera, Psychodidae): supplementary characters of five Quate’s species, Papéis Avulsos de Zoologia 64, pp. 1-8 : 6

Trichomyia trukensis Quate, 1959

( Figs. 4 A-H)

Trichomyia trukensis Quate, 1959: 441-442 , figs. 3a-g.

Material examined: holotype ♂ ( USNM) Federated States of Micronesia, Truk, Moen I, Mt. Teroken, 80 m, 28.XII.1952, J.L. Gressitt leg. 213.

Diagnosis: Palpus with three segments. Male terminalia with a strongly sclerotized arm of gonocoxite, cylindrical gonostylus, and a bifurcated aedeagus with long ejaculatory apodeme. Cercus piriform with three setae at the apex, and hypoproct with a truncated apex with micropilosity and a cluster of setulae at the base.

Supplementary description: Male: Head oval, wid- er than long in frontal view, rounded eyes. Supraocular bristles in a single row. Antennal socket subtriangular, with a short distance between them, less than ⅓ the length of the antennal socket ( Fig. 4A ). Occipital bristles in a row restricted to the posterior margin of the eye. Antenna with 13 flagellomeres, scape subcylindrical and subspherical pedicel, flagellomeres piriform and asymmetrical, first flagellomere the same length as the second flagellomere. Ascoids digitiform, with 1.1 times the length of flagellomere ( Fig. 4B ). Flagellomeres 12 and 13 globose, the last with an apiculus subcircular with two setae in the apex ( Fig. 4C ). Palpus with three segments, first segment with sensilla grouped in a pit, palpus formula 1.0:1.5:1.4 ( Fig. 4D ). Male terminalia: hypandrium fused with gonocoxites. Arm of gonocoxite with filiform hook shape, without bristles, projected diagonally, at an angle of 60° and strongly sclerotized. Gonostylus cylindrical, little sclerotized, without bristles and with a truncated apex, articulated with the ventral region of the gonocoxite. Aedeagus bifurcated, a pair of parameres bifurcated apically, long ejaculatory apodeme, 2.6 times the length of parameres ( Figs. 4E, 4F ). Cercus piriform in ventral view with three setae in the apex and bristles randomly distributed throughout its length ( Fig. 4G ). Hypoproct with truncated apex, apical micropilosity and a cluster of setulae concentrated in the basal region. Epandrium quadrangular with the bifurcated base and alveoli concentrated in the apex of the two lateral. ( Fig. 4H ).

Figures

Figures 4. Trichomyia trukensis Quate, 1959. (A) Head, ventral view; (B) Scape, pedicel and first flagellomeres; (C) Last flagellomeres and apiculus; (D) Palpus; (E) Male genitalia,dorsal view;(F) Male genitalia,dorsal view;(G) Cercus;(H) Cercus,epandrium and hypoproct.