Helicopsyche (Feropsyche) inflata, 2019

Neto, Jaime De Liege Gama, Ribeiro, José Moacir Ferreira & Passos, Mahedy Araujo Bastos, 2019, Two new species of Helicopsyche Siebold 1856 (Insecta: Trichoptera: Helicopsychidae) from Pará State, northern Brazil, Zootaxa 4565 (3), pp. 420-426 : 425

Helicopsyche (Feropsyche) inflata sp. nov.

Figs. 3 A–3G.

Diagnosis. The male of H. inflata n. sp. is similar to those of H. apicauda Flint 1968 , H. monda Flint 1983 , and H. paucispina Botosaneanu & Flint 1991 , resembling those species mainly in the primary branch of each gonocoxite having a pointed apex. The new species can be easily distinguished by the phallus, in lateral view, evenly curved ventrad at midlength in the new species (only slightly curving ventrad along its length in H. apicauda and H. paucispina ); by the endotheca with lateral lobes in the new species (without those lobes in H. apicauda and H. paucispina ); and by the triangular basimesal lobe of each gonocoxite in the new species and absence of this lobe in H. monda .

Description. Adult male. Head with cephalic warts oval and flat. Postantennal setal warts bean-shaped, almost as wide as scape. Antennal scape as long as eye diameter. Forewings brownish, each 4.0 mm long (holotype). Hind wings each 3.0 mm long (holotype), with 22 hamuli on basal half of Costa; anal border with fringe of long setae, as long as hind wing width ( Fig. 3A ). Abdominal sternum VI process about half as long as its segment, straight in lateral view, tubular, oriented posteroventrad, and apically rounded ( Fig. 3B ).

Male genitalia. Segment IX, in lateral view, with anterior lobe narrowly ellipsoid, oriented anteromesad, anterodorsal margin slightly convex; lateral apodeme curved dorsad posteriorly, tergal transverse apodeme absent, sternal transverse apodeme absent ( Fig. 3C ); in ventral view, rectangular, anterior margin recessed, nearly straight, without posterior process ( Fig. 3D ); in dorsal view with anterior margin deeply concave ( Fig. 3E ). Segment X directed posterad, in lateral view, dorsal margin nearly straight, tapering to narrowly rounded apex, ventral margin straight ( Fig. 3C ); in dorsal view, slightly narrowing apically, apex distinctly and shallowly notched, with about 11 pairs of subequal megasetae in longitudinal rows ( Fig. 3E ). Superior appendages apically broad, short, each with membranous base, oriented lateroposterad ( Figs. 3C, 3E ). Gonocoxites each with primary branch, in lateral view, generally widely quadrangular, with emarginate posterodorsal margin, apex slender and strongly produced posterad ( Fig. 3C ); in ventral view without incision between primary branch and basomesal lobe ( Fig. 3D ); in dorsal view elongate and strongly tapering apically, inner margin with subapical setal chalazae and another group of setal chalazae about midlength, external margin smooth ( Fig. 3E ); basomesal lobe, in lateral view, nearly completely hidden by primary branch ( Fig. 3C ); in ventral view, triangular, with 8 short apical megasetae ( Fig. 3D ); basal plate, in ventral view, tapered with apex narrowly rounded ( Fig. 3D ). Phallus, in lateral view, evenly curved ventrad at midlength, with small phallic shield at base ( Fig. 3F ); endotheca produced with dorsal lobe very expanded in lateral view ( Fig. 3F ); in ventral view with lateral lobes prominent ( Fig. 3G ); phallotremal sclerite conspicuous, bean-shaped ( Figs. 3F, 3G ).

Female, pupa, larva, and egg: Unknown.

Holotype male. BRAZIL: Pará: Parauapebas municipality, Serra dos Carajás, small order stream, 6°2’24.828”S; 50°17’38.184”W, 7–9.viii.2018. Pennsylvania light trap, leg. J.L. Gama Neto & J.M.F. Ribeiro. (alcohol; MPEG).

Distribution. Brazil (Pará). Type locality only.

Etymology. The term “inflata” refers to the endotheca with its dorsal lobe extremely inflated in lateral view.

Figures

FIGURE 3. Helicopsyche (Feropsyche) inflata sp. nov. 3A, male forewing (upper) and hind wing (lower). 3B, VI sternal process, left lateral. 3C–3G, male genitalia: 3C, left lateral; 3D, ventral; 3E, dorsal; 3F, phallus, left lateral; 3G, phallus, ventral.