Amphinemura lingulata Du & Wang

Ji, Xiao-Yu, Du, Yu-Zhou & Wang, Zhi-Jie, 2014, Two new species of the stonefly genus Amphinemura (Insecta, Plecoptera, Nemouridae) from China, ZooKeys 404, pp. 23-30 : 25-26

Amphinemura lingulata Du & Wang sp. n. Figs 7-12

Material examined.

Holotype ♂ China, Shaanxi Province, Houzhenzi, Upriver of Hougou, 26 May 1995, leg. Du Yu-Zhou. Paratypes 6♂♂, Sichuan Province, Laohegou Natural Reserve, 1700m, 25 May 2012, leg. Ji Xiao-Yu, Tang Xiao-Tian; 2♂♂, Shaanxi Province, Qinling Mountain Range, Railway Station of Qinling, 15 May 1995, leg. Wang Min.

Adult habitus.

Head brown, antennae light brown, pronotum brown, with light rugosities. Legs brown. Wings subhyaline, light brown, veins brown.

Male.

Forewing length 6.5-6.8 mm, hind wing 5.4-5.8 mm. Tergum 9 weakly sclerotized, bearing a row of long hairs at distal margin. Tergum 10 weakly sclerotized, with a large flat area below the epiproct, with few spines each side of the epiproct (Fig. 7). Hypoproct broad basally and tapering toward blunt rounded tip, vesicle slightly constricted basally, three times longer than wide (Fig. 8). Paraproct divided into 3 lobes; inner lobe weakly sclerotized, slender, with a short darkly sclerotized line medially; median lobe weakly sclerotized basally, bearing several long strong spines on the large membranous and strongly curved tip; outer lobe darkly sclerotized, slender, with 4 or 5 strong spines at the triangular tip (Fig. 10). Epiproct slender in the dorsal aspect; dorsal sclerite side mostly membranous, with a pair of sclerotized small triangular tongue-shaped projections encasing each side of the bifurcated tip (Fig. 11); lateral arms slender, darkly sclerotized, a pair of sclerotized lateral bands convergent apically (Fig. 9); ventral sclerite forming a median keel-shaped ridge, bearing many black spines ventrally (Fig. 12).

Female.

Unknown.

Etymology.

The Latin “lingulata” refers to the pair of small triangular tongue-shaped projections encasing each side of the tip of epiproct.

Diagnosis.

This new species is related to Amphinemura didyma Zhu & Yang (2002) in having the similar median and outer paraproct lobe. However, their epiprocts are markedly different. Amphinemura lingulata sp. n. is also similar to Amphinemura zhoui Li & Yang (2008b), Amphinemura helanshana Li, Murányi & Yang (2013) and Amphinemura tibetensis Zhu & Yang (2003) in the epiproct with a pair of sclerotized small projections encasing each side of the tip, but their paraproct lobes are different obviously.