Neoperla gordonae Stark, 1983

Stark, Bill P. & Sivec, Ignac, 2008, New Species And Records Of Neoperla (Plecoptera: Perlidae) From Vietnam, Illiesia 4 (3), pp. 19-54 : 22-23

Neoperla gordonae Stark

Neoperla gordonae Stark, 1983:109 .

Holotype ♂ ( National Reference Collection , Thailand). Wannaset Stream, Sahaerate Field Station, Thailand

Material examined. Vietnam: Cao Bang, Ba Be National Park near dorm annex, 14‐23 May 1995, D. Currie, B. Hubley, J. Swann, ROM 956049, 1 ♂ ( ROM). Dong Nai, Cat Tien National Park, stream near park headquarters, 11 ° 26’ N, 107 ° 25’ E, 23 August 1998, B. Hubley, D. Currie, ROM 982006, 1 ♂ ( ROM). Gia Lai, An Khe District, 10 km NW Buoenloy, Cha River, road to Tram Lap, 27 June 1996, D. Currie, ROM 961098, 1 ♂ ( ROM). Gia Lai, An Khe District, Dacklest River 5.2 km NE Tram Lap, 14 ° 24’ N, 108 ° 33’E, 15 June 1996, D. Currie, J. Swann, ROM 961047, 1 ♂ ( ROM). Gia Lai, An Khe District, Tram Lap, Azun River, 2 km NE forestry building, 23 June 1996, D. Currie, J. Swann, ROM 961084, 3 ♂ ( ROM, IEBR). Same but 17 June 1996, D. Currie, J. Swann, ROM 961056, 2 ♂ ( ROM). Gia Lai, Buoenloy, April 1995, A. Gorohov, 2 ♂ ( PMSL). Nghe An, ca. 25 km SW Con Cuong, Khe Moi Forestry Camp, tributary Khe Moi River, 18 ° 56’ N, 104 ° 49’ E, 4 June 1995, B. Hubley, J. Swann, ROM 956158, 1 ♂ ( ROM). Same except 100 m above Khe Moi Forestry Camp, 5 June 1995, B. Hubley, J. Swann, ROM 956161, 1 ♂ ( ROM). Nghe An, Con Cuong, Con River, 2 June 1995, B. Hubley, J. Swann, ROM 956148, 4 ♂ ( ROM, IEBR). Nghe An, ca. 25 km SW Con Cuong, Khe Moi Forestry Camp, 18 ° 56’ N, 104 ° 49’ E, 3 June 1995, ROM 956150, B. Hubley, J. Swann, 1 ♂ ( ROM). Tuyen Quang, Pac Ban, Gam River, 21 May 1996, D. Currie, D.C. Darling, J. Swann, ROM 963002, 1 ♂ ( ROM). Tuyen Quang, Pac Ban, 25 May 1996, D. Currie, D.C. Darling, J. Swann, ROM 963078, 2 ♂ pinned ( ROM).

Remarks. This species was previously known from Thailand ( Stark 1983; Uchida & Yamasaki 1989) and is closely related to N. leptacantha , described below. Some variation in distribution of aedeagal sac armature was obvious among these specimens with those from each site generally being fairly consistent. Most of the variation involves relative size and position of the dorsobasal spine patch. The most common form in these samples has a few fine spicules on the tube apex, a small dorsobasal patch of spinules on the everted sac, and short rows of small, curved hooks on both dorsal and ventral margins; these end well before midlength leaving the apical sac surface unarmed. Other specimens lack the apical tube spicules and have the dorsobasal sac patch more or less expressed and are more similar to the holotype in these respects. This entire complex will need to be analyzed when more female associations and egg studies are available.