Amphinemura viet, Stark & Sivec, 2010

Stark, Bill P. & Sivec, Ignac, 2010, Eight New Species Of Amphinemura (Plecoptera: Nemouridae) From Vietnam, Illiesia 6 (5), pp. 41-51 : 49-50

Amphinemura viet sp. n.

( Figs. 24-27 )

Material examined. Holotype ♂, 2♂ and 1♀ paratypes from Vietnam, Vinh Phu, Tam Dao Hill Station , lower waterfall of stream flowing through town, 11 May 1996, ROM 961030, B. Humble, D.C. Darling ( ROM). Additional Paratypes: Vietnam: Lao Cai, Sapa, Fan Si Pan Mountains , 25-30 March 1995, W. Mey, 3♂, 4♀ ( ZMB) . Vinh Phu, Tam Dao , 600-900 m, 17-31 May 1995, A.V. Gorohov, 1♂, 1♀ ( PMSL) . Vinh Phu, Tam Dao , 900 m, 50 km N Hanoi, 23 March 1995, W. Mey, 5♂, 9♀ ( ZMB) .

Adult habitus. General color pale brown. Head brown without distinctive pattern. Pronotum pale along median suture and with darker rugosities on central disk. Wings pale with pale amber veins. Legs pale brown.

Male. Forewing length 5.5 mm. Epiproct with three elongate, subequal, slender processes ( Fig. 24 ); lateral processes sinuate and slightly swollen subapically and pointed at the apex; median projection relatively straight and gradually tapered to apex. Epiproct inflated at midlength in lateral aspect, with tips of lateral processes bent ventrad ( Fig. 26 ). Mesal paraproct lobe slightly club-shaped in lateral aspect and armed with several apical spines ( Fig. 25 ); apex emarginate in caudal aspect. Posterior margin of tergum 9 with a prominent hump in lateral aspect; vesicle long and slender.

Female. Forewing length 6.5 mm. Sclerotized lobes of subgenital plate broadly separated by pale, lightly sclerotized areas on midline ( Fig. 27 ). Subgenital plate base covered by hind margin of sternum 7; mesal area of sternum 9 swollen but posterior margin straight.

Larva. Unknown.

Etymology. The species name honors the indigenous Viet people, and is used as a noun in apposition.

Diagnosis. The epiproct of this species appears generally similar to the deeply divided, trilobed structures of A. fleurdelia (Wu) , A. nanlingensis Yang, Li & Sivec and A. elongata Li, Yang & Sivec (Li et al. 2005; Li & Yang 2007; Yang et al. 2005) but this species differs from all these in having the lateral processes of the epiproct subapically swollen.

Figures

Figs. 24-29. Amphinemura viet (24-27) and Amphinemura spp. (28-29) 24. Male terminalia, dorsal. 25. Paraproct, caudal aspect 26. Male terminalia, lateral. 27. Female terminalia, ventral. 28. Amphinemura Vn-A, female terminalia, ventral. 29. Amphinemura Vn-B, female terminalia, ventral.