Cheumatopsyche songbua 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 : 139-141

Cheumatopsyche songbua Oláh & Johanson , new species

Fig. 334–338

Cheumatopsyche songbua is similar to C. kysonia , but the forewing membranes of C. songbua are more or less covered by indistinct pale spots, which in C. kysonia are restricted to the radial area. The forewing membranes of C. songda , new species also have spots, but these are restricted to the anal veins area. In genitalia, C. songbua have shorter, more rounded apical lobes of segment IX, not long and triangular as in C. kysonia ; and the harpagones are more slender and parallel-sided, not widely triangular; the apical setae on harpagones are absent in C. songbua while present in C. kysonia ; and the phallic endothecal process is slightly more produced ventrad.

Male. Body and wings brown with brown pubescence; forewings with pale spots over most of wing surfaces. 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 light coloured warts. Proepisternum without swol- len setal wart. Protarsal claws asymmetrical, laterally flanked by setal bundle. Forewing length 5.1 mm, hind wing length 4.0 mm. Hind wing fork I absent.

Male genitalia. Segment IX fused annularly; tergum slightly shorter than sternum ( Fig. 334), produced into well-developed, rounded ventrocaudal spiny lobe with 8–12 stout stiff spines ( Fig. 335); anterior margins of segment IX uniformly convex ( Fig. 334); apical lobe on posterolateral margins short, rounded, located at mid-height of segment IX ( Fig. 334), bordering very wide articulation cavity of coxopodites. Spine row on posterior margins of segment IX continuous; spines on dorsocaudal lobe longer and stiffer than spines on apical lobes. Intersegmental step between segment IX and segment X deep, occupied by dorsal part of segment X ( Fig. 334). Segment X short, nearly triangular, with sharply tapering apex ( Fig. 334). Setaless mesocaudal lobe forming rounded central lobe in dorsal view ( Fig. 336). Apicoventral setal lobes completely fused with segment X along ventral margin ( Fig. 334). Lateral setose areas forming pair of elevated, sphaerical warts, located centrally on segment X ( Fig. 334, 336); with apices slightly exceeding lateral margins of segment X in dorsal view ( Fig. 336). Dorsal and lateral interlobular gaps absent. Obliquely transverse sutures present ( Fig. 334, 336), dividing segment X into less sclerotised basal apart, and more strongly sclerotised distal part. Strongly sclerotised longitudinal sutures present, meeting transverse sutures proximally; forming continuation of apicoventral lobes ( Fig. 334). Coxopodites strongly exceeding apex of segment X, nearly straight, dilating distad along their lengths ( Fig. 334); slightly curving mesad in ventral view ( Fig. 337). Harpagones forming laterally flattened, broad, almost parallel-sided plate tapering slightly near apex in lateral view ( Fig. 334), clearly sagittally flattened in ventral view, armed with two setae at apex (not illustrated). Phallotheca ( Fig. 338) slender, narrowing towards mid-length before subsequently broadening before apex; sclerotised endothecal process short, rounded; phallotremal sclerites broad; vestigial ventral endothecal membranous lobe visible.

Holotype male: VIETNAM: Thanh Hoa Province: Cuc Phuong National Park , 400 m, 17.x.1986, light [J. Oláh] ( OPC, in alcohol).

Paratypes: VIETNAM: Ha Son Binh Province: Hoa Binh, 8 km to Dabac , 21.x.1986, light [J. Oláh] — 2 males ( OPC, in alcohol) ; VIETNAM: Ha Son Binh Province, Hoa Binh Hotel , 23.x.1988, light [J. Oláh] — 2 males ( OPC, in alcohol) ; VIETNAM: Bac Thai Province, Quang Chu , 24–25.v.1987, light [J. Oláh] — 5 males ( OPC, in alcohol) .

Distribution: Vietnam (Thanh Hoa, Ha Son Binh & Bac Thai Provinces).

Etymology: after the river “Song Bua” at the type locality.