Cheumatopsyche yangmorseorum 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 : 197-198

Cheumatopsyche yangmorseorum Oláh & Johanson , new species

Fig. 329–332

This species is similar to C. longiclasper Li from China (Fujian). Cheumatopsyche yangmorseorum is easily distinguished from C. longiclasper in having bow-like and more dorsad drawn anterior margins of segment IX, while it is almost straight in C. longiclasper . Furthermore, the laterodistal spiny lobes on segment IX are situated far from each other; the smooth mesocaudal lobe is not turning dorsal and not knob-like in lateral view; the apicoventral setose lobes taper in ventral view, aviform with laterad directed beak in dorsal view. The phallothecal dorsum is straight, with weak convexity, not deeply concave as in C. longiclasper , and not significantly constricted in middle as seen in lateral view.

Male. Body and wings pale brown with brown pubescence. Legs and antennae ochraceous. Maxillary palp formula I-(III, IV)-II-V, segment V as long as sum of segments I–IV. Head dorsum dark brown, with 7 slightly lighter setal warts due to paler alveoli, 2 anterolateral warts being fused. Swollen setal wart absent on each proepisternum. Setal wart present on precoxale. Pretarsal claws asymmetrical, laterally flanked by setal bundle. Spur formula 244. Protibiae with small posteroapical spur.

Wings. Forewing slightly light speckled, with darker veins. Forewing crossveins m-cu and cu almost tangential. Cu1 and A1 separate at posterior margin. Sc and R meeting at crossvein r. Crossvein s located anteriorly of crossvein r. Hind wing fork 1 absent. Forewing length 4.3 mm.

Male genitalia. Abdominal segment IX fused annularly; tergum short; sternum 3 times longer than tergum ( Fig. 329). Anterior margins of segment IX smoothly bow-shaped, sinuous dorsally in lateral aspect ( Fig. 329). Apical lobe on posterolateral margins blunt angled, located above less sclerotized, cleft articulation cavity of gonocoxites ( Fig. 329). Spine row on posterior margin of segment IX continuous, heterogeneous. Spines on dorsolateral spiny lobes more than 3 times longer than spines on apical lobes. Intersegmental step between segments IX and X shallowly obtuse-angled, almost filled by segment X. Segment X short, nearly triangular in lateral view ( Fig. 329), nearly regularly quadrangular in dorsal aspect ( Fig. 330), with broadening and rounded apical half; bi-lobed in dorsal view. Dorsal interlobular gap wide, deep. Sutures well developed on each sides, transverse, crossing segment X obliquely ( Fig. 329); longitudinal sutures running below pre-anal appendages, above continuation of apicoventral setose lobes; meeting transverse suture into well-discernible X ( Fig. 329). Smooth dorsomesal plate concave in dorsal view; straight in ventral view. Apicoventral setose lobes overlapping apically, each with tapering apex visible in lateral view ( Fig. 329); apex aviform in dorsal aspect ( Fig. 330); apex setose, with small spine before apex on dorsum. Lateral setose areas (superior or preanal appendages) forming small, rounded, elevated setal warts, basally encircled by longitudinal suture on each side. Coxopodites exceeding apex of segment X, forming straight rod with dilating base and apex in lateral view ( Fig. 329); uniformly curving mesad in ventral view ( Fig. 331). Harpagones basally broad, tapering distad; curving dorsolaterad ( Fig. 329, 331). Phallotheca with straight dorsum ( Fig. 332). Endophallus long, tube-like, filling almost entire phallotheca. Chitinized endothecal process long, circular, curving ventrad. Phallotremal sclerites broad, vertical in lateral view. Vestigial, membranous, ventral endothecal lobes slightly visible.

Holotype male: CHINA: Hubei Province, Machengxian, 27 km N Macheng, Tongjianchonghe , 150 m, 12.vii.1990 [Morse & Yang] - ( NMNH).

Distribution. China (Hubei).

Etymology. yangmorseorum , from L. F. Yang and J. C. Morse who collected the species and have contributed strongly to the understanding of the Chinese Trichoptera fauna.