Helicopsyche (Feropsyche) curvipalpia, Johanson, Kjell Arne & Malm, Tobias, 2006

Johanson, Kjell Arne & Malm, Tobias, 2006, Seven new Helicopsyche (Feropsyche) Johanson, 2002 from the Neotropical region and Nearctic Mexico (Insecta: Trichoptera: Helicopsychidae), Zootaxa 1208, pp. 1-24 : 3-4

Helicopsyche (Feropsyche) curvipalpia , new species

Fig. 1 , 3–8 , 60

Helicopsyche curvipalpia is very similar to H. borealis but is distinguished by having a curved basal maxillary palp segment ( Fig. 1, 2 ), no sternal process of the sternite VI, and more slender gonocoxites.

Male head. Cephalic warts oval, postantennal warts erect and club­shaped. Antennal scape as long as eye diameter, with 39 flagellomeres, each flagellomere with distal ring of setae. Distal segment of maxillary palp slightly shorter than proximal joint and scape, basal segment curved inward as in Fig. 1 (arrow) and separate from that in H. borealis ( Fig. 2 ).

Male wings. Venation as in Fig. 3 . Forewing golden brownish, length 7.4 mm; hind wing length 5.5 mm, with 30 hamuli.

Male abdomen and genitalia ( Fig. 4–8 ). Sternal process absent on segment VI. Anterior lobe of segment IX ( Fig. 4 ) ellipsoid in lateral view and oriented anteriad in middle; anterodorsal margin nearly straight, anteroventral margin concave; in dorsal view, inner margin uniformly ellipsoid ( Fig. 5 ); in ventral view, with small central posterior process ( Fig. 6 ); lateral apodeme forms nearly horizontal, straight line at dorsal half ( Fig. 4 ), tapering anteriorly and fading before meeting anterior margin; sub­marginal line absent; tergal transverse and sternal transverse apodemes absent. Tergum X oriented posteroventrad in lateral view ( Fig. 4 ), slightly curved upward at apex, apex pointed; lateral margins parallel in dorsal view ( Fig. 5 ), apical part weakly notched, with about 23 pairs of megasetae in group starting at midlength on segment, the lateral and dorsal megasetae about equally long. Superior appendage club­shaped ( Fig. 4 ). Primary branch of gonocoxite, lateral view ( Fig. 4 ), generally club­shaped, narrowest immediately before midlength, with sharply undulate dorsal margin due to erect setal bases, apex produced posteriorly and weakly curved medially, narrowest part of primary branch about as wide as maximum height and width of tergum X ( Figs. 4, 5 ); anterodorsal margin sigmoid, smooth, posteroventral margin with single small erect setal basis bases at midlength. Basimesal lobe hidden behind primary branch in lateral view ( Fig. 4 ); in ventral view, lobe wide and pointed dorsally, edged and smooth ( Fig. 6 ), with about 21 megasetae on dorsal surface. Basal plate in lateral view ( Fig. 4 ) nearly straight, wide along its length; sharply triangular in ventral view ( Fig. 6 ). Phallus proximally wide in lateral view ( Fig. 7 ), bent posteroventrally at 1/5 of its length and nearly straight at median half, apex about as broad as base; in ventral view ( Fig. 8 ) phallic basis absent; endotheca weakly produced, posteroventral part well sclerotized; sperm channel divided and angled at 1/5 of its length into narrow posterior and anterior parts.

Holotype male: MEXICO: Chih. Hwy 127, 27.7 mi SW La Junta, 0.5 mi N Sierra Alta Tarahumara, 6900 ft, UV light, 7.vii.1986 [S. McCleve & P. Jump] (INHS, alcohol).

Paratypes: same data as holotype— 17 females (INHS, alcohol), 1 male, 5 females (NRM, alcohol).

Distribution. Mexico (Chihuahua) ( Fig. 60 ).

Etymology. curvipalpia , from Latin, curvus meaning curved and palpus meaning palp, derived from the shape of the basal segment of the maxillary palps.

Figures

FIGURES 1 – 2. Head of 1 — Helicopsyche curvipalpia, new species, holotype; 2 — Helicopsyche borealis (Hagen), non­type. Arrow in Fig. 1 points at first segment of right maxillary palp. Scale bar 0.5 mm refers to both figures.

FIGURES 3 – 8. Helicopsyche curvipalpia, new species, holotype. 3 — right wings; 4 — genitalia, lateral; 5 — genitalia, dorsal; 6 — genitalia, ventral; 7 — phallus, lateral; 8 — phallus, ventral.

FIGURES 60 – 62. Distribution maps showing the localities of the new species and the new records. 60 — Mexico, showing the distributions of H. curvipalpia (filled square) and H. sinuata (filled circle); 61 — Panama, showing the distributions of H. incisa (filled square), H. chiriquensis, H. linguata, H. woldai and H. incisa (filled circle), H. blantoni and H. woldai (open square), and H. sanblasensis (cross); 62 — Brazil, showing the distributions of H. paprockii and H. cipoensis (filled square).