Amphinemura leigong, Wang & Du & Sivec & Li, 2006

Wang, Zhi-Jie, Du, Yu-Zhou, Sivec, Ignac & Li, Zi-Zhong, 2006, Records And Descriptions Of Some Nemouride Species (Order: Plecoptera) From Leigong Mountain, Guizhou Province, China, Illiesia 2 (7), pp. 50-56 : 52

Amphinemura leigong sp. n. Wang & Du

( Figs. 1‐7 )

Material examined. Holotype ♂, China: Guizhou Province, Leigong Mountain, Lianhuaping , 1450‐ 1620 m, 17‐18 September 2005, Wang Zhi‐ Jie . Paratypes: 5 ♂, same data as holotype .

Adult habitus. Head and antennae dark brown, head slightly wider than pronotum. Wings hyaline and brown, veins dark brown. Legs brown.

Male. Forewing length 6.5‐7.0 mm; hindwing length 5.2‐6.0 mm. Tergum 9 weakly sclerotized, slightly raised in front, deeply constricted medially behind, with narrow indentation at middle of hind margin and bearing two clusters of tiny black spines at each side of indentation ( Figs. 1, 3 ). Tergum 10 with large median unsclerotized concavity bearing several tiny black spines along lateral margins, and several stronger spines distally. Hypoproct trapezoidal, tapering to a narrow apex which extends over inner lobes of paraprocts; vesicle long and slender, reaching over half of hypoproct ( Fig. 2 ). Paraprocts divided into 3 lobes; inner lobe triangular, slightly sclerotized; median lobe broad at base, tapering in distal 2/3 and ending with a black, strongly sclerotized, inwardly directed and acute tip; outer lobe small, slender, distinctly sclerotized, reaching about midlength of median lobe ( Fig. 4 ). Epiproct dorsal sclerite mainly membranous with slightly sclerotized lateral arms; ventral sclerite sclerotized with wide base forming a long and narrow sclerotized median process bearing a row of tiny black ventral spines ( Figs. 5‐7 ). Median process ends in a tubular structure slightly raised upward. Upper part of ventral sclerite strongly sclerotized, triangular at base with two narrow, black lateral prongs. Prongs oriented parallel, slightly curved inward with several small distal denticles. In mating specimens and those treated with KOH, the prongs are divergent as shown in Figs. 5‐6 .

Female. Unknown.

Distribution. Guizhou Province (Leigong Mountain), China.

Remarks. Amphinemura leigong belongs to a group of species which share a trifurcate epiproct. This group includes A. cestroidea Li & Yang , from Sichuan, A. chui (Wu) and A. elongata Li, Yang & Sivec , from Zhejiang, A. fleurdelia (Wu) from Fujian, and A. guangdongensis Yang, Li & Zhu and A. nanlingensis Yang, Li & Sivec , from Guangdong. The apparent sister species, A. nanlingensis , differs in shape, armature and orientation of the lateral prongs of the epiproct. Specifically, the prongs of A. nanlingensis lack denticles at their distal end, whereas other species differ in shape of paraprocts. Detailed studies in the future should reveal the relationship of A. leigong to the species from Guangdong.

Etymology. The name, a noun in apposition, refers to Leigong Mountain, the type locality.

Figures

Figs. 1‐7. Amphinemura leigong sp. n. 1. Male terminalia, dorsal; 2. Male terminalia, ventral; 3. Male terminalia, lateral; 4. Male paraproct; 5. Male epiproct, dorsal (treated in KOH); 6. Male epiproct, ventral (treated in KOH); 7. Male epiproct, lateral.