Amphinemura ancistroidea Li & Yang, 2007

Li, Weihai & Yang, Ding, 2007, Review of the genus Amphinemura (Plecoptera: Nemouridae) from Guangdong, China, Zootaxa 1511 (1), pp. 55-64 : 56

Amphinemura ancistroidea Li & Yang , sp. nov.

( Figs. 1–5 )

Diagnosis. The epiproct is composed of a pair of lateral sclerites that form a slender inner spine and a robust outer strap that slightly curves outward apically and a single longer median spine. The median lobe of the paraproct is recurved anteriorly, and has three heavy, black spines apically.

Male: Body length 3.9–4.2 mm; forewing length 5.3–5.6 mm, hindwing length 4.2–4.6 mm.

Head and its appendages dark brown. Protonum brownish yellow, trapezoidal, with obtuse angle. Thorax darkish; wings subhyaline; legs brownish yellow. Abdomen dark brown; hypoproct and cerci brownish; hairs on abdomen mostly pale.

Terminalia ( Figs. 1–5 ): Tergum 9 weakly sclerotized except posterior margin distinctly sclerotized, anteromedial constriction forms large, shallow triangular incision, with many black tiny spines at middle and a row of long hairs along posterior margin. Sternum 9 with slender vesicle 5X its width; hypoproct wide basally, then distinctly tapering toward tip. Tergum 10 weakly sclerotized except anteriorly where it is distinctly sclerotized, with a large and shallow median concavity bearing several tiny black spines located along posterolateral margin. Cercus slightly sclerotized, longer than wide, nearly cylindrical. Epiproct with pair of lateral sclerites consisting of a slender inner spine and a robust outer spine that slightly curves outward apically; a single longer median apical spine extends anteriorly from ventral sclerite. Paraproct divided into three lobes: outer lobe distinctly sclerotized, much shorter than median lobe, finger-like and distinctly curved inward apically as a hook; median lobe sclerotized, strongly recurved dorsally, bearing tiny spines medially with three black spines at cylindrical tip; inner lobe weakly sclerotized, slightly longer than outer lobe, more or less straight, with acute tip.

Female: Unknown.

Type material. Holotype male, CHINA: Guangdong Province, Yingde County, Shimentai , 2003. III. 28, D. Yang . Paratype 1 male, same data as holotype .

Distribution. China (Guangdong).

Etymology. The Greek prefix ‘ancistro plus a suffix ‘oidea’, refers to the hook-shaped outer lobe of the paraproct.

Remarks. The new species is somewhat similar to A. sinensis (Wu) in the shape of the epiproct and paraproct, but may be separated from the latter by the epiproct lateral spine being rounded at tip, the median process with the apex pointed in dorsal view, and by the paraproct with its median lobe wide and apically cylindrical. In sinensis , the lateral spine of the epiproct is narrowed toward the tip, the median process has a truncate apex in dorsal view, and the paraproct has its median lobe tapering and apically acute ( Wu 1938).

Figures

FIGURES 1–5. Amphinemura ancistroidea sp. nov. (male). 1. Terminalia, dorsal view. 2. Terminalia, ventral view. 3. Epiproct, dorsal view. 4. Epiproct, lateral view. 5. Right paraproct, caudal view.