Neoperla tamdao

Stark, Bill P. & Sivec, Ignac, 2008, New Species And Records Of Neoperla (Plecoptera: Perlidae) From Vietnam, Illiesia 4 (3), pp. 19-54 : 39

Neoperla tamdao Cao & Bae

( Figs. 107‐108 )

Neoperla tamdao Cao & Bae, in Cao et al., 2007. Holotype ♂ (Seoul Women’s University Aquatic Insect Collection). Thac Bac , Tam Dao National Park, Vinh Phu Province, Vietnam

Material examined. Vietnam, Nghe An, ca. 25 km SW Con Cuong, Khe Moi River Forestry Camp, tributary Khe Moi River, 18 ° 56’ N, 104 ° 49’ E, 308 m, 6 June 1995, B. Hubley, ROM 956172, 2 ♂, 2 ♀ ( ROM). Same site, 4 June 1995, B. Hubley, J. Swann, ROM 956158, 11 ♂, 1 ♀ ( ROM). Same site, 3 June 1995, B. Hubley, J. Swann, ROM 956150, 6 ♂ ( ROM). Same site but 100 m upriver of Forestry Camp , 5 June 1995, B. Hubley, J. Swann, ROM 956161, 4 ♂, 1 ♀ ( BPS). Lao Cai, ca. 4 km W Sapa Village, tributary Golden River , 16‐23 May 1999, 1200 m, A. Lathrop, ROM 992020, 1 ♂ ( ROM). Gia Lai, Buoenloy , April 1995, A. Gorohov , 1 ♂ ( PMSL). Gia Lai, An Khe District, Tram Lap, Azun River , 2 km NW on trail from forestry building, 14 ° 27’ N, 108 ° 33’ E, 23 June 1996, D. Currie, J. Swann, ROM 961084, 3 ♂, 2 ♀ ( ROM). Same site but 17 June 1996, D. Currie, J. Swann, ROM 961056, 1 ♂, 1 ♀ ( IEBR). Gia Lai, An Khe District, NE Tram Lap, 6 m wide tributary Azun River , 20 June 1996, B. Hubley, D. Currie, ROM 961073, 1 ♂ ( ROM). Gia Lai, An Khe District, 10 km NW Buoenloy, Cha River, on road to Tram Lap , 27 June 1996, D. Currie, ROM 961098, 1 ♀ ( ROM) .

Remarks. The process of tergum 7 of this species is somewhat similar to that of N. furcata Zwick and related species from Borneo ( Zwick 1986), and the aedeagus is also of the general type seen in that species group. Neoperla tamdao differs from these in having the tergum 7 process more rounded and less deeply notched, and the aedeagal sac has fewer lobes which are also less spiny. Cao et al. (2007) suggest the egg chorion for this species is smooth but among our specimens the entire chorion is covered with fine punctations and on the lid, punctations are enclosed by obscure follicle cell impressions formed by rows of punctations ( Figs. 107‐108 ).

Figures

Figs. 106‐111. Egg micrographs. 106. N. mnong. 106. Egg, 107‐108. N. tamdao. 107. Egg, 108. Collar. 109‐111. N. nebulosa. 109. Egg, 110. Collar, 111. Lid.