Cheumatopsyche bidikala 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 : 120-121

Cheumatopsyche bidikala Oláh & Johanson , new species

Fig. 289–292

This species is similar to C. bolosa , but the dorsal interlobular gap is shallower, and the phallotheca is strongly constricted at mid-length in lateral view. The long, slender harpagones have short, broad bases, and are straight in ventral view. In addition, the species has only 7 setose warts on the head. It is much smaller than C. bolosa .

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 brown with 7 similarly coloured warts. Antennae 1.2 times longer than forewings. Proepisternum without swollen setal wart. Protarsal claws asymmetrical, with laterally flanked setal bundle. Each protibiae with 2 spurs. Forewing length 6.5 mm, hind wing length 4.8 mm. Forewing crossveins m-cu and cu forming continuous line.

Male genitalia. Segment IX fused annularly, short; tergum about half as long as sternum; anterior margin of segment IX nearly straight, with posterad curving dorsum ( Fig. 289); apical lobe on posterolateral margins long, rounded, located above articulation cavity of coxopodite; spine row on posterior margins of segment IX interrupted at segment X ( Fig. 289); curving spines on dorsocaudal lobe of dorsum about 2 times longer than straight spines on apical lobes. Intersegmental step between segment IX and segment X occupied by pair of setose protuberances. Segment X long, apically curving dorsad ( Fig. 289); apices oval in lateral view ( Fig. 289); irregular in dorsal view ( Fig. 290); ventral margin slightly convex. Apicoventral lobes curving dorsad; all, except apices, fused with segment X; dominating distal part of segment X. Setaless mesocaudal lobe reduced. Dorsal interlobular gap narrow, shallow; recurved apices of fused apicoventral setal lobes separated by dorsal interlobular gap. Pair of setose areas present on dorsobasal part of segment X, forming small protuberances or dorsocaudal lobes, visible in both lateral and dorsal view ( Fig. 289, 290). Transverse sutures not visible. Longitudinal sutures running parallel with ventral margin of segment X ( Fig. 289). Lateral setose areas forming pair of elevated, rounded warts located slightly apically of mid-length of segment X. Coxopodites slightly exceeding apex of segment X ( Fig. 289); bases broad, followed by short, thin sections; gradually broadening distally; almost straight in lateral view ( Fig. 289); bases spherical in ventral view ( Fig. 291); slightly curving mesad along their length ( Fig. 291). Harpagones ( Fig. 289) without broad base in lateral view; forming long, dorsad curving, thin, digitate process in lateral view; in ventral view ( Fig. 291) short, broad at bases before strongly narrowing into thin, straight distal parts. Phallotheca ( Fig. 292) with small phallobase, horizontal shaft straight, constricted ventrally at half-length, ending in ventral subapical broadening in lateral view; sclerotised endothecal process circular, narrowing ventrally; phallotremal sclerites broadly rounded in lateral view.

Holotype male: MADAGASCAR: Ambidikala , Pres Riviere , Ranomara, Del Brickville, ix.1954 [R. Paulian] ( MNHN, in alcohol).

Distribution: Madagascar.

Etymology: from the name of the type locality.