Nemoura spinacerca, 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 : 284

Nemoura spinacerca sp. n.

( Figs. 17-20 )

Material examined. Holotype ♂ and 15♂ paratypes from Phu Hin Rongkla National Park , Huai Man Daeng Noi trail, near km 2, 101° 03’ N, 16° 47’ E, 1600 m, Loei Province, Thailand, 27 March 2002, Chiang Mai University Team, Malaise Trap ( PMSL). Additional Paratypes: Thailand: Type locality, 22 April 2002, 33♂ ( PMSL) . Type locality 22 May 2002, 50♂, 42♀ ( PMSL) . Type locality, 20 May-21 June 2002, 60♂ ( PMSL) . Type locality, 20 July-23 August 2002, 12♂, 14♀ ( BPS) . Type locality, 22-23 August 2002, 4♂ ( PMSL) . Type locality, 27 August-27 September, 7♂, 58♀ ( PMSL) . Type locality, 21 September-21 October 2002, 9♂, 31♀ ( PMSL) . Type locality, 21 October-16 November 2002, 5♂ ( PMSL) . Type locality, 14 November-14 December 2002, 3♂ ( PMSL) . Type locality, 17 December 2002 - 17 January 2003, 4♂ ( PMSL) . Type locality, 10 January-10 February 2003, 4♂ ( PMSL) . Type locality, 10 February-17 March 2003, 5♂ ( PMSL) . Type locality, 17 March- 10 April 2003, 16♂, 8♀ ( BPS) . Type locality, 5 April-5 May 2003, 33♂ ( BPS) . Type locality, 5 May-5 June 2003, 31♂ ( PMSL) .

Adult habitus. General color brown. Antennae uniformly brown. Legs uniformly pale brown.

Male. Forewing length 7 mm. Tergum 9 with a pair of sparse patches of sensilla basiconica and tergum 10 with a few sensilla basiconica along anterior margin ( Fig. 17 ). Epiproct short, wide, constricted apically and bearing an apical pair of large, sclerotized hooks that curve outward and a pair of short parallel median lobes that are closely appressed. Cerci wide, with a mesoventral spine and an apical finger-like process ( Figs. 17-19 ). Vesicle about twice as long as wide ( Fig. 18 ).

Female. Forewing length 9 mm. Sternum 7 produced into wide strongly sclerotized lobe reaching nearly the half of sternite 8 ( Fig. 20 ); apex truncate.

Larva. Unknown.

Etymology. The species name refers to the prominent ventral cercal spine.

Diagnosis. See N. stylocerca below. This species is a member of the Cercispinosa Complex recognized by Baumann (1975).

Figures

Figs. 17-20. Nemoura spinacerca. 17. Male terminalia, dorsal. 18. Male terminalia, lateral. 19. Male terminalia, ventral. 20. Female terminalia, ventral.