Amphinemura guizhouensis Li & Yang

Li, Weihai & Yang, Ding, 2006, Three new species of Amphinemura (Plecoptera: Nemouridae) with a key to the species from Guizhou Province, China, Zootaxa 1154, pp. 41-48 : 44-45

Amphinemura guizhouensis Li & Yang , sp. nov.

( Figs. 6–11 )

Diagnosis

Epiproct enlarged anterolaterally with bifurcate apex, dorsal sclerite with pair of darkly sclerotized, sinuous, lateral bands convergent apically. Outer lobe of paraproct with basal portion fused with median lobe and then curved outward posteromedially forming an acute angle, fringed with many dark spines; median lobe with a kidney­like distal part strongly curved upward, bearing rows of black spines.

Adult. Forewing length 6.2–6.6 mm, hindwing length 5.2–5.6 mm.

Head and compound eyes dark; antennae and legs brown. Thorax and mouthparts dark brown. Wings hyaline. Abdomen brown; hairs on abdomen mostly pale.

MALE terminalia. ( Figs. 6–10 ): Tergum nine weakly sclerotized, but anterior margin darkly sclerotized, with broad mid­anterior and posterior incisions, a group of tiny spines and several long hairs sub­medially at posterior margin. Sternum nine with spatulate vesicle; hypoproct basally wide, distinctly tapering posteromedially and slightly constricted sub­apically. Tergum ten weakly sclerotized, heavier sclerotization at posterior margin, with large median concavity bearing a bundle of tiny spines at anterolateral margin. Cerci longer than wide, slightly sclerotized. Epiproct sclerotized and enlarged anterolaterally, with bifurcate apex; dorsal sclerite with pair of darkly sclerotized, sinuous, lateral bands convergent apically; ventral sclerite narrow at base, extending to a greatly enlarged, keel­shaped tip, bearing a row of short spines ventrally. Paraprocts divided into three lobes: outer lobe distinctly sclerotized, with basal portion fused with median lobe and then curved outward posteromedially, forming a right angle, fringed with many dark spines; median lobe slightly sclerotized and elongate into a kidney­like distal part strongly curved upward with rows of black spines, slightly longer than outer lobe; inner lobe slightly sclerotized, with pointed tip curved inward, shorter than median lobe.

FEMALE terminalia. ( Fig. 11 ): Sternum seven with posterior margin produced, extending over the middle of sternum eight, with a saddle­shaped sclerotized band medially. Subgenital plate basally trapeziform with distal part expanded postero­laterad into two transverse and semicircular lobes and a trapeziform median indentation at posterior margin. Cerci cylindrical.

Type material

Holotype male, CHINA: Guizhou, Leigong Mountain, Linchang, 1,551 m, 2005. VI. 6, J. Zhang. Paratypes 1 male and 8 females, same data as holotype.

Distribution

China (Guizhou).

Etymology

The specific name refers to its type locality.

Remarks

The new species is similar to A. yangi from Tibet, but may be easily distinguished from the latter by the tip of the epiproct which is enlarged and bifurcate, the lateral bands of the epiprocts are sinuous in shape and the ventral sclerite is gently angled ventrally in lateral view. In A. yangi , the epiproct distinctly tapers apically and has two lateral bands almost straight in shape, and the ventral sclerite of the epiproct forms a sharp triangular keel ventrally in lateral view ( Zhu & Yang, 2003).

Figures

FIGURES 6 – 11. Amphinemura guizhouensis sp. nov. 6. Male genitalia, dorsal view. 7. Male genitalia, ventral view. 8. Epiproct, posterior view. 9. Epiproct, lateral view. 10. Right paraproct, caudal view. 11. Female genitalia, ventral view.