Cheumatopsyche simayorum Oláh & Johanson, 2008

Oláh, J. & Johanson, K. A., 2008, Generic review of Hydropsychinae, with description of Schmidopsyche, new genus, 3 new genus clusters, 8 new species groups, 4 new species clades, 12 new species clusters and 62 new species from the Oriental and Afrotropical regions (Trichoptera: Hydropsychidae), Zootaxa 1802, pp. 1-248 : 182-184

Cheumatopsyche simayorum Oláh & Johanson , new species

Fig. 299–302

This pale fuscous animal resembles C. agnetae Oláh & Johanson from Hong Kong. It is distinguished from C. agnetae by the apicoventral setose lobe on segment X that is not elongated; the dorsally located superior appendages, not ventrally located as in C. agnetae ; and the broad, apicodorsad excising harpagones.

Male. Body dark brown, legs pale brown. Maxillary palp formula I-(III, IV)-II-V, segment V as long as sum segments I–IV. Dorsum of head darker fulvous, with 9 slightly lighter setal warts. Swollen setal wart absent on proepisternum, setal surface present on each precoxale. Protarsal claws asymmetrical, laterally flanked by setal bundle. Claws on mid- and hind-legs asymmetrical. Spur formula 244. Protibiae with posteroapical pale spur half as long and broad as anteroapical spur.

Wings. Forewing membrane evenly pale fuscous with slightly darker veins and few minute, white spots scattered unevenly. Apical one-third of subcostal cell and nearly half radial cell paler. Median linear window forming transparent hyaline line on longitudinal vein M, starting shortly before junction; exceeding junction of M1+2. Forewings crossvein m-cu located apically of cu by a distance equal to half crossvein length. Sc and R separate before costa. Cu2 and A1 separate before posterior wing margin. Hind wing Sc and R meeting apically of crossvein r by a distance equal to length of crossvein. Crossvein r tangential with crossvein s. Fork 1 absent, only atrophied base of R2+3 visible. Forewing length 6.3 mm.

Male genitalia. Abdominal segment IX fusing annularly; shortly abbreviated ( Fig. 299); sternum about 1.5 times longer than tergum; Anterior margins of segment IX regularly bow-shaped, drawn slightly less dorsally in lateral aspect ( Fig. 299). Apical lobe on posterolateral margins bluntly rectangular, shifted ventrad to less sclerotized articulation cavity of gonocoxites ( Fig. 299). Antecostae well developed, wide before margin, sharply narrowing dorsally and ventrally; with well developed external groove of antecostal sutures. Spine row on posterior margins of segment IX continuous and heterogeneous ( Fig. 299). Spines on dorsolateral spiny lobes double as long as spines on apical lobes. Dorsolateral spiny lobes forming pair of regularly rounded lobes separated at middle by wide, shallow, incision with minute triangle in middle. Intersegmental step between segments IX and X stepwise, almost right-angled. Segment X moderately long; slightly narrowing apically in lateral view ( Fig. 299); distal part formed by horizontal smooth mesocaudal lobe and dorsad curving apicoventral setose lobes. Segment X clearly rounded quadrangular in dorsal view ( Fig. 300). Dorsal interlobular gap small, filled by enlarged, bluntly triangular, smooth mesocaudal lobe. Sutures on both sides well developed; both transverse sutures crossing obliquely segment X; longitudinal sutures broad, forming continuation of apicoventral setose lobes, meeting transverse suture into Y. Smooth mesocaudal lobe large, ending in protruding triangular margin, forming rim in lateral view ( Fig. 299); apicoventral setose lobe long, strongly bending dorsad; blunt-cut apically; not tapering in lateral view; clearly curving mesally, apices bird head shape in dorsal view ( Fig. 300). Lateral setose areas (superior or preanal appendages) forming elevated warts dorsally near apex. Coxopodites strongly exceeding apex of segment X, forming straight rod, slightly dilating dorsad near apex ( Fig. 299); slightly curving mesad before apex in ventral view ( Fig. 301). Harpagones broad, with weakly pronounced apicodorsal excision in lateral view ( Fig. 299), straight, nearly parallel-sided in ventral view ( Fig. 301). Phallotheca with short broadening basal section curving ventrad ( Fig. 302), continuing into horizontal section with convex dorsum and concave ventrum forming sharp arch in lateral view ( Fig. 302). Phallotheca broadening ventrad into bulb subapically. Endophallus long, running through almost entire phallotheca, ending in narrow tube at gonopore; chitinized endothecal process strongly pigmented; nearly triangular. Phallotremal sclerites rounded in lateral view.

Holotype male: VIETNAM: Gia Lai Contum Province, Lo Xo Pass , 1100 m, 25.ii.2007 light [G. Simay] - ( OPC, alcohol)

Paratypes: VIETNAM: same data as holotype - 9 males ( OPC)

Distribution. Vietnam.

Etymology. simayorum , named in honour of Mr Simay and his son for collecting the species in light trap at this remote area in Vietnam.