Nemoura wangi Li & Yang

Li, Weihai & Yang, Ding, 2008, New species of Nemoura (Plecoptera: Nemouridae) from China, Zootaxa 1783, pp. 61-68 : 66-68

Nemoura wangi Li & Yang , sp. nov.

( Figs. 23–28 )

Diagnosis. This small species is characterized by an elongate epiproct that tapers to a blunt point apically. Additionally, the outer lobe of the two-lobed paraprocts forms a distinct hook apically that recurves dorsally.

Male. Forewing length 3.8–4.5 mm, hindwing length 3.3–3.8 mm. Head and appendages dark brown; compound eyes dark. Thorax brown; wings subhyaline; legs brownish yellow. Abdomen brown with pale hairs.

Terminalia ( Figs. 23–27 ): Tergum nine weakly sclerotized with anterior and posterior margins nearly parallel. Sternum nine with robust vesicle, narrow basally and swollen apically, much longer than half hypoproct length; hypoproct suboval, broad basally and gradually tapering posteromedially to a small tip. Tergum ten slightly sclerotized, except posteromedially where it is heavily sclerotized, a shallow median concavity present bearing several tiny, black spines anteriorly, posteriorly on either side of epiproct tip are two lateral humps topped by a thick, black spine and several tiny hairs. Cercus sclerotized, heavily so apicolaterally, with a large, apical, laterally directed spine. Epiproct elongate and tapering apically to a blunt point; dorsal sclerite with two darkly sclerotized loops medially; ventral sclerite sclerotized, ventrally broad at base and narrowing toward apex, with several black spines ventrally. Paraproct with outer lobe distinctly sclerotized to form a hook apically; inner lobe slightly sclerotized, nearly quadrangular, with a membranous area proximally with rows of hairs.

Female ( Fig. 28 ). Forewing length 5.0 mm, hindwing length 4.3 mm. Sternum 7 heavily sclerotized with Y-shaped pregenital plate, distal part overlapping anterior margin of subgenital plate of sternum 8. Subgenital plate sclerotized, with anterior portion produced anteriorly, posterior margin straight, covering a darkly sclerotized, triangular plate posteriorly. Cercus membranous.

Type Material. Holotype: male ( IZCAS), CHINA: Xinjiang, Hejing, 42o31'N, 86o35'E, 2,600 m, 1958. VII. 28, Ch. Li. Paratypes: 1 male ( IZCAS), Xinjiang, Wukugonglu, Tianshanbeipo?, 1965. VI. 19, 1,600 m, Sh. Wang; 4 males, ( IZCAS), Xinjiang, Wukugonglu, Tianshanbeipo?, 1960. VI. 14, 1,600 m, Sh. Wang; 2 males ( IZCAS), Xinjiang, Buerjin, 47o70'N, 86o92'E, 480 m, 1960. VIII. 25, Sh. Wang; 1 male ( IZCAS), Xinjiang, Hejing, 42o31'N, 86o35'E, 2,600 m, 1965. VI. 18, Sh. Wang.

Distribution. China (Xinjiang).

Etymology. The species is named after the collector, Shuyong Wang.

Remarks. The new species is related to N. jilinensis Zhu & Yang from Jilin by the dorsal sclerite of the epiproct forming a semicircular structure and by a similar cercus. It may be separated from N. jilinensis by the sclerotized apical hook of the paraproct. In N. jilinensis , the paraproct is slightly sclerotized with two protrusions apically ( Zhu and Yang 2003).

Figures

FIGURES 23 – 28. Nemoura wangi sp. nov. (male). 23. Terminalia, dorsal view. 24. Terminalia, ventral view. 25. Epiproct, dorsal view. 26. Epiproct, lateral view. 27. Right paraproct, caudal view. 28. Female terminalia.