Cheumatopsyche zao 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 : 145

Cheumatopsyche zao Oláh & Johanson , new species

Fig. 349–352

With short, nearly quadrangular segment X, this small species resembles C. kirimaduwa (Schmid) from Sri Lanka and C. dhanikari Malicky from South Andaman. It is easily separated from the 2 species by the presence of a small ventrocaudal spiny lobe on segment IX which has only 2 small, stiff spines; by the more weakly dilated coxopodite apices; and in dorsal view the sharply triangular apex of segment X.

Male. Body and wings brown with brown pubescence. 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 lighter coloured warts. Proepisternum without swollen setal wart. Protarsal claws asymmetrical, laterally flanked by setal bundle. Forewing length 5.4 mm, hind wing length 4.1 mm. Hind wing fork I absent.

Male genitalia. Segment IX fused annularly; sternum about 4 times longer than tergum ( Fig. 349); anterior margins of segment IX convex, shallowly acute at ventral marginin lateral view ( Fig. 349). Apical lobes not produced posterad, instead separated by deep incision dorsally of articulation of coxopodites. Spine row on posterior margins of segment IX complete; tergal spines longer and stiffer than spines on apical lobes. Segment X occupying intersegmental step between segment IX and segment X ( Fig. 349). Segment X short, nearly quadrangular, with sharply posterad tapering apex of setaless mesocaudal lobe ( Fig. 349, 350). Apicoventral setal lobes completely fused with ventrodistal margin of segment X, delineated by setae. Lateral setose areas forming pair of elevated warts located centrally on segment X ( Fig. 349); both apices exceeding lateral margin of segment X in dorsal view ( Fig. 350). Dorsal and lateral interlobular gaps on fused segment X absent. Transverse sutures located obliquely on segment X ( Fig. 349, 350); dividing segment into less sclerotised basal part and more strongly sclerotised distal part ( Fig. 349). Strongly sclerotised longitudinal suture present above ventral margin of segment X; meeting transverse suture at posterior margin of segment IX; forming continuation of apicoventral lobes ( Fig. 349). Coxopodites exceeding apex of segment X; straight in lateral view ( Fig. 349), curving mesad in ventral view ( Fig. 351); slightly dilating basad and distad in lateral and ventral view. Harpagones sharply triangular; slightly curving dorsad in lateral view ( Fig. 349) and mesad in ventral view ( Fig. 351), clearly flattened. Phallotheca ( Fig. 352) strongly narrowing towards mid-length before widening apically; sclerotised endothecal process long, oval; phallotremal sclerites broad; vestigial membranous ventral endothecal membrane visible.

Holotype male: VIETNAM: Lam Dong Province: Baoloc, Baco stream, 25.x.1988, singled [J. Oláh] ( OPC, in alcohol).

Paratype: VIETNAM: Lam Dong Province, Dalat, Prenn waterfall, 19.x.1988, light [J. Oláh] — 1 male ( OPC, in alcohol) .

Distribution: Vietnam (Lam Dong Province).

Etymology: after the “zao” ethnic minority living near the type locality.