Hydropsyche namea Oláh & Barnard, 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 : 148-149

Hydropsyche namea Oláh & Barnard , new species

Fig. 251–255

This species is close to H. brontes Malicky & Chantaramongkol from Malaysia. Hydropsyche brontes has forewing membrane patterns of light spots, and H. namea has uniformly coloured forewing membranes. The new species has both apical lobes on segment IX sharply quadrangular, not rounded as in H. brontes ; both coxopodites are sinuate, almost S-shaped, not straight; the harpagones are almost as long as the coxopodites and parallel sided in lateral view; the apicoventral setose lobes are well separated, not tangential as in H. brontes ; the dorsal interlobular gap is wide; the shape of the phallic apparatus is different: the phallothecal tube is as broad as the height of the bend, only half as broad in H. brontes ; the membranous endothecal processes are different, but their protrusions are highly dependent on the state of eversion and erection at the time of capture and fixation; however, the chitinized spine on the dorsolateral membranous endothecal process is re-curved and larger than in H. brontes .

Male. Body and wings yellow, with strongly sclerotized sclerites brown. Forewing membranes uniformly coloured, without pattern. Maxillary palp formula I-(III, IV)-II-V, segment V as long as sum of segments I–IV. Head dorsum light, almost yellow, with 10 setal warts of same light colour; forming 1 pair posterior, 2 pairs anterolateral and 4 anteromesal, interantennal warts. Swollen setal wart present on proepisternum. Pretarsal claws symmetrical, without laterally flanked setal bundle. 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 6.0 mm, hind wing length 4.9 mm.

Male genitalia. Abdominal segment IX fused annularly, short ( Fig. 251). Median keel medium sized ( Fig. 251); dorsal surface granulose; lateral surfaces flat, only slightly narrowing apicad; apex incised; anterior margin arciform; ventrum very short, dorsum long ( Fig. 251). Antecosta well developed, widening before margins. External groove of antecostal sutures present. Apical lobe on posterolateral margins straight cut, sharply quadrangular ( Fig. 251). Posterior spine row intermittent, present only dorsally on segment X and on apical lobes, absent between. Depression between segments IX and X almost filled; very shallow, obtusely angle present. Body of segment X broadly rounded, dorsally short ( Fig. 251). Lateral setose areas (preanal appendages) in ventral position, diffuse into compact, less pigmented, circular setose areas with scattered groups of setae posteriorly to light, setose window ( Fig. 251, 252). Apicoventral setose lobes located mid-apically, as long as body of segment X, broad, robust, with longitudinal fossula running dorsad, both ending in bulged and bilobed apex clearly visible in dorsal view ( Fig. 252). Dorsal interlobular gap long, wide surrounded by but not enclosed by apicoventral lobes. Apicodorsal setose lobes shifted to dorsal margin, forming fused pair of elongate, crested areas ( Fig. 251, 252). Smooth cavity on anterolateral area of segment X deep. Cavity rim surrounded by transverse suture on each side. Both longitudinal sutures located below lateral setose areas. Coxopodites short, robust, strongly sinuous, almost S-shaped ( Fig. 251); apices slightly curving mesad in ventral view ( Fig. 253). Harpagones elongate, nearly as long as coxopodites, with slightly dilated apex ( Fig. 253). Phallic apparatus double sinuate, forming long tube of same diameter along its length ( Fig. 254); phallotremal sclerites heavily pigmented, double rounded, exposed; at these sclerites, tube slightly narrowing in lateral view ( Fig. 254); not constricted in ventral view ( Fig. 255); followed by sclerotized, ventral phallothecal lobe of tube; apex hiding eversible membrane with cluster of spicules. Two pairs small, membranous processes arising from apical portion; very small pair originate from mid-length, large pair originate from proximal end, immediately below dorsally located phallotremal sclerites. Dorsolateral membranous lobe armed with large, re-curved, spine chitinized along its length; basis membranous, or with very short membrane visible intruded into phallotheca.

Holotype male: MALAYSIA: West-Malaysia , Belum Expedition, 12.i.1994, light trap 2 [M. Erle] ( NHML, in alcohol).

Paratype: same data as holotype, except ii.1994, light trap 1 ( NHML, in alcohol) .

Distribution. Malaysia.

Etymology. namea , from “name”, meaning curve in Sanskrit, referring to the large, re-curved spine on the dorsolateral membranous endothecal lobe.