Hydropsyche keoda Oláh & Johanson, 2008

Oláh, J. & Johanson, K. A., 2008, Generic review of Hydropsychinae, with description of Schmidopsyche, new genus, 3 new genus clusters, 8 new species groups, 4 new species clades, 12 new species clusters and 62 new species from the Oriental and Afrotropical regions (Trichoptera: Hydropsychidae), Zootaxa 1802, pp. 1-248 : 146-148

Hydropsyche keoda Oláh & Johanson , new species

Fig. 246–250

This species is similar to Hydropsyche homunculus Schmid. The new species is easily separated from that species by the much longer harpagones; the lateral profile of the phallotheca with different sinuosity; and the endothecal processes of the 2 species are different.

Male. Body and wings ochraceous with light pubescence. Maxillary palp formula I-(III, IV)-II-V, segment V as long as sum of segments I–IV. Head dorsum light, almost yellow, with 9 warts of same light colour. Swollen setal wart present on proepisternum. Pretarsal claws asymmetrical, not laterally flanked by setal bundle, some setal bundle present only on foreleg. Spur formula 244. Protibiae with posteroapical spur smaller than anteroapical spur.

Wings. Venation typical for the genus. Forewing crossveins m-cu and cu separate. Sc and R, and Cu2 and A separate before costa. Hind wing Sc and R meeting before costa about at crossvein r. Stem of M and Cu1 running closely. Median cell closed. Fork 1 present. Forewing length 7.4 mm, hind wing length 5.8 mm.

Male genitalia. Abdominal segment IX fused annularly, short ( Fig. 246). Median keel long, narrow ( Fig. 247); dorsal surface granulose; lateral surfaces flat; anterior margin arciform, ventrum short, dorsum about 2 times longer than ventrum ( Fig. 246). Antecosta well developed, widens before margin. External groove of antecostal suture present. Apical lobe on posterolateral margins robust, broad, nearly triangular, comprising bulk of segment ( Fig. 246). Posterior spine row intermittent, present at segment X and on apical lobes, absent between. Depression between segments IX and X filled, only very small step visible in lateral view ( Fig. 246). Body of segment X broadly rounded, short ( Fig. 246, 247). Lateral setose areas (preanal appendages) located ventrally on segment X, diffusing into compact, less pigmented circular setose area with scattered groups of setae posteriorly to light, setose window. Apicoventral setose lobes located dorsally, shorter than body of segment, broad, robust, each with longitudinal fossula (small fossae) running dorsad, ending in bulged and bilobed apex clearly visible in lateral and dorsal view ( Fig. 246, 247). Dorsal interlobular gap long, narrow, surrounded by apicoventral lobes, enclosed by mesal corners of bilobed apex. Apicodorsal setose lobes present at mid-length of dorsal margin in lateral view ( Fig. 246), forming fused pair of circular setose areas. Smooth cavity in anterolateral area of segment very deep. Rim of cavity surrounded by transverse sutures. Short longitudinal suture located on both sides under lateral setose areas. Coxopodites short, robust, slightly sinuous in lateral view ( Fig. 246); nearly straight in ventral view ( Fig. 248). Harpagones elongate, almost as long as coxopodites, apex slightly dilate ( Fig. 248). Phallic apparatus double sinuate, forming long tube of same diameter along its length ( Fig. 249), phallotremal sclerites heavily pigmented, double rounded, exposed; tube narrowing at these sclerites ( Fig. 249); strongly constricting in ventral view ( Fig. 250), followed by sclerotized ventral phallothecal lobe of tube hiding eversible membrane with cluster of spicules. Ventral lobe of tube widening strongly after constriction, ending in 5 small lobes in ventral view ( Fig. 250); with pair of small, slim dorsolateral membranous, anterad directing lobes at base of phallotremal sclerites, each with small, apical spine.

Holotype male: VIETNAM: Lamdong , Dalat, Monastery Balcony, 17.x.1988, light [J. Oláh] ( OPC, alcohol).

Paratype: same data as holotype — 1 male ( OPC, alcohol) .

Distribution. Vietnam.

Etymology. keoda , from “keo daira”, meaning elongate in Vietnamese, referring to the unusually elongated harpago.