Amphinemura divergens, Stark & Sivec, 2010

Stark, Bill P. & Sivec, Ignac, 2010, Eight New Species Of Amphinemura (Plecoptera: Nemouridae) From Vietnam, Illiesia 6 (5), pp. 41-51 : 44

Amphinemura divergens sp. n.

( Figs. 7-9 )

Material examined. Holotype ♂ and 1♂ paratype from Vietnam, Lao Cai, Sapa, Fan Si Pan Mountains , 25-30 March 1995, W. Mey ( ZMB).

Adult habitus. General color dark brown. Head and pronotum dark, antennae and legs uniformly dark brown.

Male. Forewing length 6-7.5 mm. Epiproct bearing a pair of apically serrate, lateral arms which diverge from the body axis and curve ventrolaterad near the tip ( Figs. 7, 9 ); ventral sclerite armed along much of length with serrae and tip divided into a pair of slender processes nested between longer lateral lobes. Paraprocts armed with 4-6 prominent apical spines on mesal lobe, other lobes unarmed ( Fig. 8 ). Tergum 10 bearing a pair of small patches of thick, midlateral, spine-like setae; tergum 9 strongly constricted mesally by a U-shaped posterior notch; margins of notch bearing patches of short, peg-like sensilla.

Female. Unknown.

Larva. Unknown.

Etymology. The species name refers to the divergent tips of the lateral lobes of the epiproct.

Diagnosis. The epiproct of this species is generally similar to that of A. caoae , A. hamiornata Li & Yang , A. leigong , A. nigritubulata Li & Yang , A. viet and related species in bearing strongly sclerotized lateral processes which diverge somewhat from the body axis ( Li & Yang 2008b, 2008e; Wang et al. 2006). In this species the projecting lobes which lie between the lateral arms are divided and unarmed and the lateral aspect of the epiproct reveals a series of small teeth along most of the length of the ventral sclerite.

Figures

Figs. 7-12. Amphinemura divergens (7-9) and A. giay (10-12). 7, Male terminalia, dorsal. 8. Paraproct, caudal aspect. 9. Male terminalia, lateral. 10. Male terminalia, dorsal. 11. Paraproct, caudal aspect.12. Epiproct, lateral.