Helicopsyche (Feropsyche) linguata, 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 : 14-16

Helicopsyche (Feropsyche) linguata , new species

Fig. 34–43 , 61

Helicopsyche linguata , new species is unique in having a pair of very large bean­ and tongue­ shaped postantennal setal warts, elevated cephalic setal warts, a very short segment IX, a short and tapering tergum X, a sickle­shaped primary branch of the gonocoxite that is apically hooked medially, a long and almost straight inner margin of the basal part of the gonocoxite, a wide triangular basal plate, and a weakly curved phallus. With respect to the genitalia, especially the shape of the gonocoxite, H. linguata is very similar to H. hageni Banks , H. guadeloupensis Malicky , H. molesta , H. rentzi Denning & Blickle , and H. linabena Johanson & Holzenthal , but it is separated by other genitalic characters as described in the remarks below.

Male head ( Fig. 34–35 ). Cephalic warts elevated, slightly shorter than eye radius, anteriorly straight and posteriorly rounded. Postantennal warts large, bean­shaped, and slightly elevated. Antenna with scape slightly longer than eye diameter. Maxillary and labial palps broken.

Male wings. Venation as in Fig. 36 (damaged right forewing). Fore wing grey brownish, length 4.2 mm; hind wing length 3.1 mm; number of hamuli not counted.

Male abdomen and genitalia ( Fig. 37–43 ). Sternal process VI about half as long as its segment length; straight in lateral view ( Fig. 37 ), oriented posteroventrally and tuboid along its length, with apex rounded and divided into lamellae ( Fig. 38 ). Segment IX with anterior lobe shallowly ellipsoid in lateral view ( Fig. 39 ), oriented anterodorsad and situated slightly dorsally on segment; anterodorsal margin slightly concave and shorter than anteroventral margin; inner margin narrowly ellipsoid in dorsal view ( Fig. 40 ); central posterior process absent in ventral view ( Fig. 41 ). Lateral apodeme oriented slightly anterodorsally in lateral view ( Fig. 39 ), straight, equally wide along its length, meeting anterior margin; sub­marginal line absent; tergal transverse apodeme absent; sternal transverse apodemes weak. Tergum X oriented posteroventrad in lateral view ( Fig. 39 ), curving slightly downwards towards wide apex; narrowing along its length in dorsal view ( Fig. 40 ); apical notch small and shallow, with about 7 pairs of dorsal megasetae of differing length in central group. Superior appendage thick and weakly club­shaped in lateral view ( Fig. 39 ). Primary branch of gonocoxite generally sickle­shaped in lateral view ( Fig. 39 ), narrowest at base; dorsal margin weakly undulating, apex strongly hooked inward and pointing anteriorly, narrowest part of primary branch narrower than maximum height of tergum X and about as wide as tergum X width ( Fig. 39, 40 ); anterodorsal margin convex, nearly smooth; posteroventral margin concave along its length, without prominent undulations. Basimesal lobe small, protruding beyond edge of primary branch in lateral view and apically rounded in lateral and ventral view ( Fig. 39, 41 ); median margins basally parallel, with convergent apices with about 14 megasetae ( Fig. 41 ). Basal plate basally wide in lateral view ( Fig. 39 ), strongly narrowing at midlength, with anterior half slender and slightly upturned ( Fig. 39 ); wide, triangular with rounded apex in ventral view ( Fig. 41 ). Ventral margin of phallus gently curved along its length in lateral view ( Fig. 42 ); basal part slightly thicker than central region in lateral and ventral view ( Fig. 42, 43 ). Phallic basis absent. Endotheca not produced, posteroventral part weakly sclerotized. Sperm channel division not observed.

Holotype male: PANAMA: Chiriqui: Fortuna Dam Site, nr. Hornitos, 1050 m, 8°55’N, 82°16’W, 13–19.vii.1977, LT trap [H. Wolda] (NMNH, alcohol).

Distribution: Panama (Chiriqui) ( Fig. 61 ).

Etymology: linguata , derived from Latin lingua, tongue, referring to the bean­ and tongue­shaped postantennal setal warts.

Remarks: In genitalia, H. linguata , new species is separated from H. hageni by the significantly shorter segment IX, the tapering tergum X, the hooked apex of the primary gonocoxite branch, and more weakly curved phallus. It is distinguished from H. guadeloupensis and H. molesta by the shorter segment IX, tergum X, and basimesal lobes, as well as the presence of a hooked gonocoxite apex. Helicopsyche linguata also has longer sternal process VI than in molesta . Helicopsyche linabena is very similar to H.

linguata , but H. linguata can be distinguished by having a hooked apex of the primary branch of the gonocoxite, a tapering tergum X, and the longer and parallel median margins of the basal part of the gonocoxites. Similar setal warts are also found on the head of H. tuxtlensis and H. rentzi , but in H. linguata the setal warts are less produced than in H. tuxtlensis and more produced than in H. rentzi .

Figures

FIGURES 34 – 35. Helicopsyche linguata, new species, holotype. 34 — head, lateral; 35 — head, dorsal.

FIGURES 36 – 43. Helicopsyche linguata, new species, holotype. 36 — right wings; 37 — VIth sternal process, lateral; 38 — VIth sternal process, ventral; 39 — genitalia, lateral; 40 — genitalia, dorsal; 41 — genitalia, ventral; 42 — phallus, lateral; 43 — 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).