Eight New Species Of The Genus Nemoura (Plecoptera: Nemouridae) From Thailand And Vietnam Author Sivec, Ignac Slovenian Museum of Natural History, Prešernova 20, P. O. Box 290, SLO- 1001 Ljubljana, Slovenia E-mail: isivec @ pms-lj. si isivec@pms-lj.si Author Stark, Bill P. Box 4045, Department of Biology, Mississippi College, Clinton, Mississippi, U. S. A. 39058 E-mail: stark @ mc. edu stark@mc.edu text Illiesia 2010 6 21 277 287 journal article http://doi.org/10.5281/zenodo.4760051 225571d6-a475-4d3e-9f2a-a2e93c50a984 1854-0392 4760051 Nemoura stylocerca sp. n. ( Figs. 21-23 ) Material examined. Holotype ♂ from ca. 12 km along road from Sapa to Lai Chau , Lao Cai Province , Vietnam , 1950 m , 22° 20.583’ N , 103° 46.157’ E , 1-12 May 1999 , B. Hubley , ROM 992002 ( ROM ). Adult habitus. General color dark brown. Head, pronotum and antennae uniformly dark brown. Femora brown, but darker near knee. Wings dark brown but with a small transparent spot near cord. Male. Forewing length 8 mm . Abdominal terga 1-7 poorly sclerotized, incomplete mesally; terga 8-10 with a complete sclerotized ring. Terga without obvious sensilla basiconica. Epiproct with a dorsal constriction near midlength ( Fig. 21 ); apex notched and bearing a pair of small finger-like processes in the notch and a pair of small, curved horns adjacent to notch and appressed to anterior margin of epiproct ( Figs. 21-22 ); lateral aspect with a prominent raised knob near midlength ( Fig. 22 ). Cerci consisting of a large dorsobasal lobe with apical hook and a smaller, stylus-like ventral lobe ( Figs. 21-23 ). Inner lobe of paraprocts small, club shaped, outer lobe large and somewhat triangular in outline; vesicle typical. Figs. 21-26. Nemoura male genitalia. N. stylocerca (21-23), 21. Male terminalia, dorsal. 22. Male terminalia, lateral. 23. Male terminalia, ventral. N. tenuiloba (24-26), 24. Male terminalia, dorsal. 25. Male terminalia, lateral. 26. Male paraprocts and cerci, ventral. Female. Unknown. Larva. Unknown. Etymology. The species name refers to the stylus-like ventral lobe of the cerci. Diagnosis. This species is similar to N. spinacerca in cercal and epiproct structure, but the dorsolateral arms on the epiproct are larger in that species and tergum 9 of that species bears a conspicuous patch of sensilla basiconica. This species is a member of the Cercispinosa Complex recognized by Baumann (1975) .