Helicopsyche (Feropsyche) linabena, 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 : 23-25

Helicopsyche (Feropsyche) linabena , new species

Fig. 67–71 , 87

In lateral view, the shape of the gonocoxite and tergum X makes this species very similar to H. hageni . The two species can be discriminated by the absence of a distinct basimesal lobe and thicker phallus in H. linabena , new species.

Male. Head: Antennal scape about as long as eye diameter. Maxillary palp segments equally long, each segment as long as eye diameter. Cephalic warts not visible. Forewing dark golden­brown, with three small silver­colored spots, length 2.9 mm. Sternum VI process absent.

Male genitalia ( Fig. 67–71 ). Segment IX, in lateral view ( Fig. 67 ), with anterior lobe widely triangular, oriented anteriad, located dorsolaterally on segment; anterodorsal margin nearly straight, anteroventral margin shallowly concave; in dorsal view ( Fig. 68 ), with inner margin hyperboloid; in ventral view ( Fig. 69 ), with minute posterior process; lateral apodeme short, extending slightly anteriorly of midlateral, transverse sternal process present, transverse tergal apodeme absent. Segment X, in lateral view ( Fig. 67 ), curving posteroventrad; slightly tapering along its length toward rounded apex; in dorsal view ( Fig. 68 ), proximally parallel­sided, distally rounded toward apex; apex with V­shaped notch ( Fig.68 ); with about 9 pairs of about equally long megasetae in longitudinal group starting at proximal half on segment ( Fig. 67 ). Superior appendage ( Fig. 67 ) irregularly club­shaped in lateral and dorsal views ( Fig. 67, 68 ); nearly straight. Primary branch of gonocoxite, in lateral view ( Fig. 67 ), generally curving posteriorly, slightly widening distally along its length; apex rounded in lateral view, hooked in dorsal view ( Fig. 67, 68 ); central part of primary branch about 2x as wide as height of central part of tergum X ( Fig. 67 ); anterodorsal margin nearly straight, smooth; posteroventral margin shallowly concave, smooth; basimesal lobe minute, slightly proceeding primary branch in lateral view, forming rounded plate in ventral view ( Fig. 69 ) and armed with about 8 dorsal megasetae ( Fig. 67, 69 ); with smooth, slightly diverging median margins; basal plate, in lateral view ( Fig. 67 ), nearly straight, apex narrowly rounded; in ventral view ( Fig. 69 ), triangular, apically rounded. Phallus, in lateral view ( Fig. 70 ), proximally nearly straight; ventral margin strongly bent ventrad at distal 1/3; anterior 1/5 more than 1.5x broader than its central part ( Fig. 70 ); in ventral view ( Fig. 71 ), tapering toward proximal 1/3; phallobase forms small lateral triangular ( Fig. 71 ); endotheca slightly produced into dorsodistal lobe ( Fig. 70 ); sperm channel divided into thick posterior and slender anterior parts; sclerotized posteroventral part wide ( Fig. 70 ).

Holotype male: VENEZUELA: T.F.A. [Territorio Federal Amazonas = Estado Amazonas]: Camp IV, Cerro de la Neblina, 0°58'N, 65°57'W, 760 m, 15–18.iii.1984, O.S. Flint, Jr. ( NMNH, pinned).

Paratypes: same data as holotype — 1 male, 5 females ( NMNH).

Distribution. Venezuela (Amazonas).

Etymology. The name linabena is an anagram of the name of the type locality, Cerro de la Neblina. The name is to be treated as a noun in apposition.

Figures

FIGURE 87. Map of Venezuela showing distributions of H. angulata (circle), H. monda (rectangle), H. tachira (triangle down), H. disjuncta (diamond), H. linabena (cross), H. camuriensis (triangle up), and H. selanderi (star).

FIGURES 67 – 71. Helicopsyche linabena, new species, holotype. 67 — male genitalia, lateral; 68 — male genitalia, dorsal; 69 — male genitalia, ventral; 70 — phallus, lateral; 71 — phallus, ventral.