Nemoura magniseta, Sivec & Stark, 2010

Sivec, Ignac & Stark, Bill P., 2010, Eight New Species Of The Genus Nemoura (Plecoptera: Nemouridae) From Thailand And Vietnam, Illiesia 6 (21), pp. 277-287 : 279-280

Nemoura magniseta sp. n.

( Figs. 7-8 )

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

Adult habitus. General color brown. Basal antennal segment pale, second antennal segment dark brown, rest of antennae uniformly brown. Head dark brown. Pronotum brown with some darker rugosities. Legs uniformly pale brown.

Male. Forewing length 6 mm. Terga 9-10 without conspicuous setation. Epiproct slightly longer than wide and bears two pairs of slender apical lobes ( Fig. 7 ); slender, straight inner lobes extend beyond outwardly directed, and more heavily sclerotized lateral lobes. Outer paraproct lobe large, unarmed, but with a small mesoapical projection; inner lobes small and unarmed ( Fig. 8 ). Cercal segments curved strongly inward; sclerotized outer margins bear a low knob in basolateral third; inner margins bear a single prominent seta at midlength. Vesicle of moderate length; greatest width near apex ( Fig. 8 ).

Female. Unknown.

Larva. Unknown.

Etymology. The species name refers to the enlarged inner marginal cercal seta.

Diagnosis. This species appears distinct from others in the genus by virtue of the enlarged, spine-like seta projecting from the inner cercal margin and by the small rounded knob on the outer cercal margin ( Fig. 7 ). The thick setal-like projection on the ventral cercal margin suggests this species is a member of the Cercispinosa Complex recognized by Baumann (1975).

Figures

Fig. 7-8. Nemoura magniseta. 7. Male terminalia dorsal. 8. Male terminalia, ventral.