Cheumatopsyche tanana Oláh & Johanson, 2008

Oláh, János, Johanson, Kjell Arne & Barnard, Peter C., 2008, Revision of the Oriental and Afrotropical species of Cheumatopsyche Wallengren (Hydropsychidae, Trichoptera), Zootaxa 1738, pp. 1-171 : 127-130

Cheumatopsyche tanana Oláh & Johanson , new species

Fig. 309–312

This species is similar to C. bolosa from which it is easily separated in lateral view by the more rectangular shape of segment IX, the longer dorsal margin of segment X, and the more strongly delated coxopodites. In addition, the harpagones are sigmoid in ventral view and the apicoventral setal lobes have more oval apices.

Male. Body and wings brown with brown pubescence; wings with no spots or pattern. Maxillary palp segment I shortest, segment II longer, segments III and IV equally long, segment V as long as sum of segments I– IV. Head dorsum light brown with 12 similarly coloured warts. Antennae about 1.2 times longer than forewings. Proepisternum without swollen setal wart. Protarsal claws asymmetrical, laterally flanked by setal bundle. Each protibiae with 2 spurs. Forewing length 8.0 mm, hind wing length 6.0 mm. Distance betwee forewing crossveins m-cu and cu equal to length of crossvein m-cu. Hind wing fork I present.

Male genitalia. Segment IX fused annularly, short, nearly rectangular in lateral view ( Fig. 309); sternum IX about 3 times longer than tergum IX ( Fig.309); anterior margin of segment IX nearly straight, with short ventral and long dorsal oblique sections; apical lobe on posterolateral margins short, widely rounded, covering dorsal part of articulation cavity of coxopodites; spine row on posterior margins of segment IX briefly interrupted near mid-height of segment X ( Fig. 309); spines on dorsocaudal spiny lobe irregularly bent and 2 times longer than straight spines on apical lobes. Intersegmental step between segment IX and segment X occupied by pair of setose protuberances ( Fig. 309, 310). Segment X long, with nearly straight dorsal margin ( Fig. 309); apex curving dorsad; tongue-shaped in dorsal view ( Fig. 310); ventral margin convex in lateral view ( Fig. 309). Apicoventral setal lobes fused with segment X, except at apices. Setaless mesocaudal lobe reduced. Dorsal interlobular gap shallow, wide ( Fig. 210). Pair of setose areas forming small protuberances in middle between posterior margin of segment IX and lateral setose areas ( Fig. 310). Short transverse sutures visible near posterior margins of segment IX ( Fig. 309), meeting longitudinal sutures anteriorly of lateral setose areas ( Fig. 309). Longitudinal sutures running along ventral margin of segment X. Setose areas forming pair of elevated, circular warts, located centrally on segment X in lateral view ( Fig. 309). Coxopodites slighly exceeding segment X apex; basis thick in lateral and ventral view ( Fig. 309, 311); narrowing immediately after bases before widening along their length in lateral view ( Fig. 309); distal halfs nearly parallel-sided in ventral view ( Fig. 311). Harpagones with broad bases, gradually tapering into digitate apices ( Fig. 309, 311); sigmoid in ventral view ( Fig. 311); curving dorsad in lateral view ( Fig. 309). Phallothecal phallobase small

( Fig. 312); straight horizontal shaft gradually narrowing along its length; sclerotised endothecal process circular, as wide as shaft; phallotremal sclerites broadly oval in lateral view.

Holotype male: MADAGASCAR: 35 km S. de Tananarive, ii.1952 [R. Paulian] ( MNHN, in alcohol).

Paratypes: MADAGASCAR: Ampangalambolosy , Nord ouest R.N.III. Chasse a la vue, 10.ix.1957 [P. Soga] — 12 males, 1 female ( MNHN, in alcohol), 2 males ( OPC, in alcohol) .

Distribution: Madagascar.

Etymology: from the name of the type locality.