Cheumatopsyche acuminata 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 : 15-17

Cheumatopsyche acuminata Oláh & Johanson , new species

Fig. 39–42

This species is close to C. camerunica , new species and is separated by the dorsomesal lobe that is recurving dorsad and anterad in lateral view, forming a shallow, wide dorsal interlobular gap on segment X. Thus, in dorsal view the mesal lobe is invisible, and the segment appears bilobed. In lateral view, the harpagones form broad–based and gradually tapering rods that are sharp and needle-like in ventral view. There are no small apicolateral warts on the apices of the apicoventral lobes.

Male. Body and wings pale brown with lighter pubescence. Maxillary palps each with segment I shortest, segment II longer, segments III and IV equally long, segment V as long as sum of segments I–IV. Head dorsum pale brown, with 7 visible, slightly paler warts. Proepisternum without swollen setal warts. Protarsal claws asymmetrical, laterally flanked by setal bundle. Each foreleg protibiae with 2 apical spurs. Forewing length 5.5 mm, hind wing length 4.0 mm. Distance between crossveins m-cu and cu equal to length of crossvein m-cu (in holotype) or almost tangential (in paratype). Hind wing fork I absent.

Male genitalia. Segment IX fused annularly and broadly; tergum short, sternum twice as long as tergum ( Fig. 39); anterolateral margins of segment IX regularly semicircularin lateral view; apical lobe on posterolateral margins broadly triangular, located above base of coxopodites ( Fig. 39); spine row along posterior margins of segment IX heterogenous, interrupted below dorsocaudal spiny lobes; spines on dorsocaudal lobes at least twice as long as others. Intersegmental step between segment IX and segment X right-angled, shallow ( Fig. 39). Segment X long, slender in lateral view; broad, widening distally and bilobed in dorsal view ( Fig. 40). Transverse sutures present ( Fig. 39). Longitudinal sutures forming continuation of apicoventral setal lobes ( Fig. 39). Setaless dorsomesal plate recurved dorsad and anterad in lateral view ( Fig. 39). Dorsal interlobular gap shallow, wide ( Fig. 40). Apicoventral setal lobes orienting posterad with narrowing apices ( Fig. 39, 40). Lateral setose area forming elevated, circular small warts located well beyond transverse and above longitudinal sutures, centrally on dostal half, immediately below base of the apicoventral lobes. Coxopodite nearly twice as long as segment X ( Fig. 39); in lateral view straight, with weakly dilating apex; in ventral view ( Fig. 41) narrowest at mid-length. Harpagones basally broad in lateral view ( Fig. 39) before sharply tapering apically; needle-like in ventral view ( Fig. 41). Phallothecal ( Fig. 42) dorsum constricted at mid-length; sclerotised endothecal process elongated, about twice as long as wide in lateral view, almost as broad as apex of phallotheca; phallotremal sclerites large, rounded in lateral view.

Holotype male: CONGO: Kindamba. Meya, Loudo River , 12.xi.1963, light [S. Endrdy] ( HNHM in alcohol).

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

Distribution: Congo.

Etymology: from acutus, sharp in Latin, referring to the sharp, needle-like harpago.