Nemoura apicalis, 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

Nemoura apicalis sp. n.

( Figs. 1-3 )

Material examined. Holotype ♂ from Sapa , Fan Si Pang Mountains, Lao Cai Province, Vietnam, 25-30 March 1995, W. Mey ( ZMB) . Paratype: Vietnam: Tam Dao , 800-1000 m, 19 May-13 June 1995, H. Malicky, 1♂ ( PMSL) .

Adult habitus. General color pale brown. First and second antennal segment darker than the rest of antennae. Head dark brown. Legs faintly banded.

Male. Forewing length 7 mm. Posterior margin of tergum 9 with a row of ca. 4-8 long slender setae ( Fig. 1 ); a few sensilla basiconica scattered on tergum 10. Epiproct short, broad basally in dorsal aspect and bearing a small apical notch ( Fig. 1 ); apex bearing a cluster of ca. 4-8 spines giving apex a biserrate appearance in dorsal aspect; ventral sclerite bearing a double row of ca. 5 widely spaced, short spines ( Fig. 2 ). Cercal apices curved outward at tip forming a truncate, foot shaped structure ( Figs. 1, 3 ). Paraproct inner lobes slender and essentially parallel to one another, outer lobes large and triangular in outline; vesicle about 3 times long as wide ( Fig. 3 ).

Female. Unknown.

Larva. Unknown.

Etymology. The name refers to the epiproct apex which in this species is notched and appears biserrate in dorsal aspect.

Diagnosis. The truncate cercal apices, biserrate epiproct apex and setal row on tergum 9 appear distinctive for this species which does not appear to be closely related to any known species.

Figures

Figs. 1-6. Nemoura male genitalia. N. apicalis (1-3), 1. Male terminalia, dorsal. 2. Epiproct, lateral. 3. Male terminalia, ventral. N. clavaloba (4-6), 4. Male terminalia, dorsal. 5. Epiproct, lateral. 6. Male terminalia, ventral.