Nemoura basispina Li & Yang

Li, Weihai & Yang, Ding, 2006, New species of Nemoura (Plecoptera: Nemouridae) from China, Zootaxa 1137, pp. 53-61 : 54-55

Nemoura basispina Li & Yang , sp. nov.

( Figs. 1–5 )

Diagnosis. Cercus mostly sclerotized, slightly enlarged at middle and terminating into a hook at its apex, a sharp spine present at its base. Dorsal sclerite of epiproct with pair of dark, baso­lateral bands and a transverse sclerotized strip medially; ventral sclerite with basal portion distinctly sclerotized, narrowing toward tip to form two D­shaped bands.

Male: Forewing length 6.5–6.7 mm, hindwing length 5.3–5.5 mm. Head and antennae dark brown; compound eyes dark; mouthparts brown. Thorax brown; wings brownish; legs yellow. Abdomen brownish yellow with hairs mostly pale.

Terminalia ( Figs. 1–5 ): Tergum nine weakly sclerotized except anterior margin distinctly sclerotized, with a broad triangular mid­anterior incision. Sternum nine with tubiform vesicle; hypoproct mostly wide with tip distinctly tapering. Tergum ten weakly sclerotized except anterior and posterolateral margins distinctly sclerotized, a shallow median concavity bearing two groups of several tiny, black spines located along anteromedial margin. Cercus mostly sclerotized, slightly enlarged at middle and terminating into a blunt hook at apex, a sharp spine present at base. Epiproct, in dorsal view, short and claviform with circular apex, enlarged medially in lateral view. Dorsal sclerite with pair of dark baso­lateral bands and a transverse sclerotized strip medially; ventral sclerite with basal portion distinctly sclerotized, narrowing toward tip to form two D­shaped bands. Paraproct slightly sclerotized, broad at base, then tapering toward round tip.

Female: Unknown.

Type Material. Holotype: male, CHINA: Guangdong, Ruyuan, Nanling National Nature Reserve, 2003. III. 24, L. Zhang. Paratype: male, same data as holotype.

Distribution. China (Guangdong).

Etymology. The specific name refers to the presence of the basal spine of the cercus.

Remarks: The new species is similar to N. fulva (Šámal) from Japan in the shape of the epiproct, but may be separated from the latter by the cercus with the basal spine. In N. fulva , the cercus has two large terminal hooks ( Zhiltzova, 2003).

Figures

FIGURES 1 – 5. Nemoura basispina sp. nov. (male). 1. Genitalia, dorsal view. 2. Genitalia, ventral view. 3. Epiproct, dorsal view. 4. Epiproct, lateral view. 5. Right paraproct, caudal view.