Helicopsyche (Feropsyche) sucrensis, Johanson, Kjell Arne & Holzenthal, Ralph W., 2004

Johanson, Kjell Arne & Holzenthal, Ralph W., 2004, Thirteen new species and new distribution records of Helicopsyche (Feropsyche) Johanson from Venezuela (Trichoptera: Helicopsychidae), Zootaxa 711, pp. 1-40 : 3-5

Helicopsyche (Feropsyche) sucrensis , new species

Fig. 1–7 , 90

In the male genitalia of the new species, the pointed process at the posterodorsal corner of the gonocoxite is longer and more prominent than in the group of similar American Helicopsyche species that includes H. apicauda Flint , H. flinti Johanson , H. grenadensis Flint & Sykora , H. incisa Ross , H. kalaom Botosanuanu , H. lambda Flint , H. limnella Ross , H. merida Botosaneanu & Flint , H. molesta Botosaneanu , H. monda Flint , H. paucispina Botosaneanu & Flint , and H. valligera Flint. Helicopsyche sucrensis can also be separated from these species by the anterior and posterior margins of the gonocoxite that run nearly parallel. It can be further distinguished from H. apicauda , H. flinti , H. grenadensis , H. lambda , and H. valligera by the absence of small lobes along the posterior margin of the gonocoxite. Finally, H. sucrensis can be separated from H. limnella , H. merida , H. molesta , H. monda , and H. paucispina by the slightly wider anterior lobe of segment IX in lateral view.

Male. Head: Antennal scape slightly shorter than eye diameter. Maxillary palp distal segment slightly shorter than proximal segment and scape. Cephalic warts slightly oval, about 1/2 as long as eye diameter, with pale grey and dark brown setae. Forewing golden brownish, length 3.3 mm. Sternum VI process ( Fig. 1, 2 ) nearly 2/3 its segment length, apparently without microtrichiae; nearly straight in lateral view ( Fig. 1 ), oriented posteroventrally, tubular along its length, except slightly wider at apex; apex lamellate ( Fig. 2 ). Male genitalia ( Fig. 3–7 ). Segment IX, in lateral view ( Fig. 3 ), with anterior lobe ellipsoid, oriented anteriad, present midlaterally; anterodorsal margin slightly concave; anteroventral margin concave; in dorsal view ( Fig. 4 ), with inner margin uniformly ellipsoid; in ventral view ( Fig. 5 ), with posterior process midventrally; lateral apodeme present as horizontal, nearly straight line ( Fig. 3 ), tapering anteriorly, diminishing before meeting anterior margin; sub­marginal line present; tergal transverse apodeme apparently absent; sternal transverse apodeme absent. Segment X, in lateral view ( Fig. 3 ), oriented posteroventrad, nearly straight; dorsally slightly produced; apex truncate; in dorsal view ( Fig. 4 ), parallel along its length, apical part weakly notched; with about 9 pairs of megasetae in lateral group starting midway on segment, the lateral megasetae somewhat shorter than the others. Superior appendage ( Fig. 3 ) strongly club­shaped, oriented posterolaterad. Primary branch of gonocoxite, in lateral view ( Fig. 3 ), generally parallel­sided at midlength, with strongly undulate dorsal margin due to slightly erect setal bases; apex strongly produced posteriorly and curving medially; central part of primary branch slightly wider than height of central part of tergum X ( Fig. 3 ); anterodorsal margin nearly straight, smooth; posteroventral margin without undulations; basimesal lobe visible in lateral view ( Fig. 3 ), wide, rounded in ventral view ( Fig. 5 ), with weakly undulating median margins, smooth; with about 7 megasetae on dorsal surface; basal plate, in lateral view ( Fig. 3 ), nearly straight, wide along its length; in ventral view ( Fig. 5 ), triangular, apex rounded. Phallus, in lateral view ( Fig. 6 ), with anterior half nearly straight, sharply bent ventrad at midlength, dorsal margin weakly undulating; ventral margin strongly angled; anterior 1/4 twice as broad as its central part ( Fig. 6 ); in ventral view ( Fig. 7 ), phallobase present as narrow lobe; endotheca weakly produced; sperm channel divided into thick posterior and slender anterior parts; posteroventral part strongly sclerotized.

Holotype male: VENEZUELA: Sucre: Peninsula de Paria, Puerto Viejo, "Rio el Pozo", 10°43.073'N, 62°28.569'W, 20 m, 3.iv.1995, Holzenthal, Flint & Cressa ( UMSP 000022229) ( UMSP, pinned).

Distribution. Venezuela (Sucre).

Etymology. The name is derived from the type locality, the Venezuelan state of Sucre. The name is to be treated as a noun in apposition.

Figures

FIGURE 90. Map of Venezuela showing distributions of H. merida (circle), H. laneblina (rectangle), H. sucrensis (cross), H. breviterga (diamond), and H. circulata (triangle).

FIGURES 1 – 7. Helicopsyche sucrensis, new species, holotype. 1 — sternum VI process, lateral; 2 — sternum VI process, ventral; 3 — male genitalia, lateral; 4 — male genitalia, dorsal; 5 — male genitalia, ventral; 6 — phallus, lateral; 7 — phallus, ventral.