Nemoura stylocerca, Sivec & Stark, 2010

Sivec, Ignac & Stark, Bill P., 2010, Eight New Species Of The Genus Nemoura (Plecoptera: Nemouridae) From Thailand And Vietnam, Illiesia 6 (21), pp. 277-287 : 284-286

publication ID	https://doi.org/ 10.5281/zenodo.4760051
DOI	https://doi.org/10.5281/zenodo.4762960
persistent identifier	https://treatment.plazi.org/id/03F887B4-FFCE-FFBA-FC38-FA332830FC29
treatment provided by	Felipe
scientific name	Nemoura stylocerca
status	sp. nov.

Treatment

Nemoura stylocerca View in CoL sp. n.

( Figs. 21-23 View Figs )

Material examined. Holotype ♂ from ca. 12 km along road from Sapa GoogleMaps 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 View Figs ); 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 View Figs ); lateral aspect with a prominent raised knob near midlength ( Fig. 22 View Figs ). Cerci consisting of a large dorsobasal lobe with apical hook and a smaller, stylus-like ventral lobe ( Figs. 21-23 View Figs ). Inner lobe of paraprocts small, club shaped, outer lobe large and somewhat triangular in outline; vesicle typical.

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).