Chinoperla unidentata Sivec & Zwick, 1989

Sivec, Ignac & Stark, Bill P., 2010, Five New Species Of Chinoperla Zwick (Plecoptera: Perlidae) From Vietnam And Thailand, Illiesia 6 (8), pp. 62-74 : 69-70

Chinoperla unidentata Sivec & Zwick

( Figs. 35-36 )

Chinoperla unidentata Sivec & Zwick, 1989:11 . Holotype ♂ (PMSL), 9 km W Chiang Dao , Thailand

Material examined. Thailand: Chiang Mai Province, Doi Suthep-Pui National Park, Huai Phalat above road, 1200 m, 98° 54’ N, 18° 48’ E, 10 November 2001, 1♂ ( PMSL). Khao Yai National Park, Khao Kheo, 11- 25 November 2000, Korrakot Damrak , 1♂ ( PMSL). Khao Yai National Park, Pa Tabak, 25 November- 9 December 2000, Korrakot Damrak , 1♀ ( PMSL).

This species was previously reported from Thailand ( Sivec & Zwick 1989) from a single male specimen. The aedeagus (as discussed above) is quite similar to those of C. gorohovi and C. sila . The previously unknown female is described below.

Female. Forewing length 10.5 mm. Subgenital plate not produced but hind margin of sternum 8 slightly emarginate mesally ( Fig. 35 ). Bristles on posterior margin of sternum 8 long.

Egg. Tear drop shaped with moderately long collar and stalked anchor. Chorion punctate throughout but punctations finer and more densely packed in subequatorial ring ( Fig. 36 ).

Comments. The female of this species is similar to that of C. sila but in that species the mesal emargination of the subgenital plate is much more conspicuous ( Fig. 25 ) and the egg of that species has the collar about half as long as in C. unidentata ; in addition the collar rim is not flanged and the chorion is uniformly punctate in the egg of C. sila (compare Figs. 19-21 and 36 ).

Figures

Figs. 35-36. Chinoperla unidentata. 35. Female terminalia. 36. Egg.

Figs. 22-25. Chinoperla sila. 22. Male terminalia. 23. Aedeagus lateral. 24. Aedeagus dorsal. 25. Female terminalia.

Figs. 16-21. Chinoperla eggs. C. rhododendrona (16-18) 16. Egg. 17. Egg collar. 18. Micropyle and equatorial chorionic detail. Chinoperla sila (19-21). 19. Egg. 20. Egg collar and anchor. 21. Micropyles and polar chorionic detail.