Nemoura atristrigata Li & Yang, 2007

Li, Weihai & Yang, Ding, 2007, Two new species of Nemoura (Plecoptera: Nemouridae) from Henan, China, Zootaxa 1511 (1), pp. 65-68 : 65-66

Nemoura atristrigata Li & Yang , sp. nov.

( Figs. 1–6 )

Diagnosis. The cercus is mostly sclerotized and gradually constricted subapically with papillate apex. A large, swordshaped spine is located subapically on the cercus. The dorsal sclerite of epiproct has a pair of sclerotized, triangular straps medially, extending to apex along the lateral margin, and a single sclerotized longitudinal band through the middle. The outer lobe of the paraproct is sub-quadrangular and sclerotized along the outer margin, forming semicircular emargination apically.

Male: Forewing length 7.4–8.5 mm, hindwing length 6.0–7.0 mm. Head, and appendages dark. Legs yellow. Abdomen brownish yellow with hairs mostly pale.

Terminalia ( Figs. 1–6 ): Tergum nine weakly sclerotized except anterior margin distinctly sclerotized, with a broad, shallow anteromedian incision and several black spines at along posteriomedially. Sternum nine with tubiform vesicle; hypoproct basally wide, distinctly tapering toward tip. Tergum ten weakly sclerotized except anterior margin distinctly sclerotized, a shallow median concavity bearing two groups of several tiny, black spines located along humped anteromedial margin. Cercus mostly sclerotized, gradually constricted subapically to a papillate apex; a large, sword-shaped spine located subapically. Epiproct quadrangular basally, with a sharp triangular tip both in dorsal and lateral view. Dorsal sclerite with pair of sclerotized, triangular straps medially, extending laterally to apex, a single sclerotized, longitudinal band traverses middle; ventral sclerite distinctly sclerotized, with 10–12 tiny spines medially. Paraproct divided into two lobes: outer lobe subquadrangular, sclerotized along outer margin, forming a semicircular emargination apically; inner lobe rectangular, slightly sclerotized at proximal margin, with triangular tip.

Female: Forewing length 10.2–11.0 mm, hindwing length 7.5–8.3 mm. Subgenital plate on sternum 8 truncate, with two quadrangular, sclerotized, lateral lobes joining a lightly sclerotized, triangular, median area. Cercus membranous.

Type Material. Holotype: male, CHINA: Henan, Nanyang, Neixiang, Baotianman National Nature Reserve , 2006. V. 18, W. Li . Paratypes: 1 female, same data as holotype ; 2 males and 3 females, Baotianman National Nature Reserve , 2006. V. 16, W. Li ; 4 females, Baotianman National Nature Reserve , 2006. V. 17, W. Li ; 1 male, Baotianman National Nature Reserve , 2006. V. 19, Y. Cui ; 2 females, Baotianman National Nature Reserve , 2006. V. 20, W. Li ; 1 male, Baotianman National Nature Reserve , 2006. V. 28, W. Li ; 1 male, Baotianman National Nature Reserve , 2006. V. 29, Y. Cui .

Distribution. China (Henan).

Etymology. The specific epithet refers to the darkly sclerotized distal spine of the cercus. The Latin prefix “atri” means dark, while the Latin “striga ” means bristle.

Remarks. The new species belongs to the N. ovocercia complex sensu Baumann (1975) by virtue of having the cercus with rounded tip. It is related to N. geei Wu from Beijing in having a similar epiproct and paraproct, but may be separated from the latter by the darkly sclerotized distal spine on the cercus. In geei , the cercus has no distal spine, and the epiproct has a trifurcate apex ( Zhiltzova 2003).

Ecology. The species is collected from the mountainous area of Baotianman National Nature Reserve (33° 02' N; 111° 50' E) with the altitude about 1,200 m above sea level. It occurs in small streams with low water temperature, usually found in shrubs or grass and on stones near the watercourses.

Figures

FIGURES 1–6. Nemoura atristrigata sp. nov. (male). 1. Terminalia, dorsal view. 2. Terminalia, ventral view. 3. Epiproct, dorsal view. 4. Epiproct, lateral view. 5. Right paraproct, caudal view. 6. Female terminalia, ventral view.