Helicopsyche golfitoensis, Johanson, Kjell Arne & Holzenthal, Ralph W., 2010

Johanson, Kjell Arne & Holzenthal, Ralph W., 2010, The snail-case caddisfly subgenus Helicopsyche (Feropsyche) in Costa Rica, with the description of 3 new species (Trichoptera: Helicopsychidae), Zootaxa 2689, pp. 37-47 : 39-41

Helicopsyche golfitoensis , new species

Fig. 8–14 , 22

Helicopsyche golfitoensis is most similar to H. tachira Johanson & Holzenthal, 2004, particularly in the shape of the primary branch of the gonopods. Helicopsyche golfitoensis is easily distinguished from H. tachira by the presence of a long process on the posteroventral margin of the primary branch of the gonopods and by the wide anterior lobes of segment IX.

Forewing length 4.0 mm; hind wing length 2.9 mm.

Male abdomen and genitalia ( Fig. 8–14 ). Sternal process VI long, straight, oriented posteroventrad; parallel-sided in lateral view ( Fig. 8 ); narrowest at midlength in ventral view ( Fig. 9 ). Anterior lobe of segment IX ( Fig. 10 ) widely ellipsoid in lateral view, oriented anterad from midheight of segment IX; anterodorsal margin nearly straight; anteroventral margin shallowly concave; ventral margin short, straight ( Fig. 10 ); in dorsal view, inner margin forming ovoid cavity ( Fig. 11 ); in ventral view, with small central posterior process ( Fig. 12 ); lateral apodeme nearly horizontal ( Fig. 10 ); fading before anterior margin of segment, sub-marginal line absent; tergal and sternal transverse apodemes present. Tergum X, in lateral view, slightly curving posteroventrad ( Fig. 10 ), straight, apex pointed, oriented posterad; in lateral view, weakly tapering along its length ( Fig. 10 ); in dorsal view ( Fig. 11 ), parallel-sided basally, narrowing from mid-length; apex shallowly notched, with about 14 pairs of equally long megasetae laterally longitudinal group starting just proximally of mid-length of segment. Superior appendage club-shaped ( Fig. 10, 11 ). Primary branch of gonopods, in lateral view ( Fig. 10 ), generally rectangular; dorsal half with undulating margins; apex wide, produced posterad; anterodorsal margin irregular; posteroventral margin with long posteroventral process with apical seta. Basomesal lobes narrowly triangular in lateral view ( Fig. 10 ); in ventral view each with truncate apex covered by minute megasetae; mesal margins weakly concave ( Fig. 12 ). Basal plate, in lateral view ( Fig. 10 ), straight, wide distally; sharply narrowing anterad from mid-length; narrowly triangular in ventral view ( Fig. 12 ). Phallic apparatus, in lateral view, wider anteriorly ( Fig. 13 ), distally parallel-sided; slightly curving ventrad along its length; basis broad; in ventral view ( Fig. 14 ), slightly wider proximally, strongly wider distally; endotheca not produced, posteroventral part well sclerotized; sperm channel slender, not widening posteriorly.

Male holotype. COSTA RICA: [Puntarenas] 2.8 mi E of Golfito, 18–19.vii.1967 [O.S. Flint, Jr.] (NMNH, alcohol).

Distribution. Costa Rica (Puntarenas) ( Fig. 22).

Etymology. Golfitoensis , named for the town of Golfito, near the type locality.

Figures

FIGURES 8 – 14. Helicopsyche golfitoensis, new species, holotype. 8 — sternum VI, lateral; 9 — sternum VI process, ventral; 10 — genitalia, lateral; 11 — genitalia, dorsal; 12 — genitalia, ventral; 13 — phallic apparatus, lateral; 14 — phallic apparatus, ventral. Scale bar (0.1 mm) refers to all figures.