Helicopsyche dorsocurvata Johanson & Holzenthal, 2010, new species
Creators: name: Johanson, Kjell Arne
name: Holzenthal, Ralph W.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Helicopsychidae
Helicopsyche
Helicopsyche dorsocurvata

description: Helicopsyche dorsocurvata, new species
Fig. 15–21, 22
Helicopsyche dorsocurvata is most similar to H. disjuncta Johanson & Holzenthal, 2004, from which it is separated by having tergum X with a deep, narrow apical notch instead of a very wide, rectangular notch.
Forewing length 4.3 mm; hind wing length 3.5 mm.
Male abdomen and genitalia (Fig. 15–21). Sternal process VI long, straight, thick, oriented posterad; nearly parallel-sided in lateral view (Fig. 15); narrowest at mid-length in ventral view (Fig. 16). Anterior lobe of segment IX (Fig. 17) widely ellipsoid in lateral view, oriented anterad from below midheight of segment IX; anterodorsal margin nearly straight; anteroventral margin shallowly concave; ventral margin short, straight (Fig. 17); in dorsal view, inner margin forming semi-circular cavity (Fig. 18); in ventral view, with wide, shallow central posterior process (Fig. 19); lateral apodeme horizontal, curving ventrad towards welldeveloped sub-marginal line (Fig. 17); tergal transverse apodemes short, weak; sternal transverse apodemes running along posterior margin of segment IX. Tergum X, in lateral view, curving dorsad (Fig. 17), apex pointed; tapering along its length (Fig. 17); in dorsal view (Fig. 18) basally narrow, widening at mid-length before narrowing towards apex; apex deeply notched; about 8 pairs of equally long megasetae present laterally in longitudinal group starting distally of mid-length of segment; most megasetae confined to apex. Superior appendages club-shaped (Fig. 17). Primary branch of gonopods, in lateral view (Fig. 17), widening distally; dorsal margin with undulating margin; apex long, narrowing posterally; anterodorsal margin irregular; posteroventral margin smooth, nearly straight, without marginal processes. Basomesal lobes short in lateral view (Fig. 17); in ventral view oriented posteromesad; each lobe with rounded apex covered by small megasetae; mesal margins strongly concave (Fig. 19). Basal plate, in lateral view (Fig. 17) curving ventrad, thick; anterior part narrower than posterior part; in ventral view, narrowly triangular (Fig. 19). Phallic apparatus, in lateral view, widest anteriorly (Fig. 20), narrowest at mid-length; distally slightly widening; slightly curving ventrad along its length; in ventral view, with basis narrow; (Fig. 21) slightly wider proximally, narrowest at mid-length, strongly wider distally; endotheca not produced, posteroventral part well sclerotized; anterior part of sperm channel slender, widening inside phallus at 1/3rd phallic length.
Male holotype. COSTA RICA: Cartago, Reserva Tapanti, Quebrada Palmitos and falls, 1400 m, 9.72°N, 83.78°W [Holzenthal, Blahnik & Muñoz] (UMSP000100631) (UMSP, alcohol). Distribution. Costa Rica (Cartago) (Fig. 22).
Etymology. Dorsocurvata, named after the dorsally curving tergum X.
description: Published as part of 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), pp. 37-47 in Zootaxa 2689 on pages 41-42, DOI: 10.5281/zenodo.199508