Cryptoperla formosana ( Okamoto, 1912 )

Stark, Bill P. & Sivec, Ignac, 2007, Taiwanese Species Of Cryptoperla (Plecoptera: Peltoperlidae), Illiesia 3 (14), pp. 150-156 : 150-151

Cryptoperla formosana ( Okamoto, 1912)

( Figs. 1-4 )

Nogiperla formosana Okamoto, 1912:136 .

Holotype ♂, Matsumura , Formosa.

Cryptoperla formosana: Uchida & Isobe, 1988:23 . Redescription.

Material examined. Material. Taiwan: Hsin Chu Co., S. Chingchuan , 830 m, 16 October 1996, I. Sivec, 1 ♀ ( PMSL) . Hua Lien Co., Hongyehshi , 6 July 1988, Wong, 11 ♂, 7 ♀ ( PMSL) . Ilan Co., Chilan , 25 October 1995, Hsu, 2 ♂, 1 ♀ ( PMSL) . Ilan, Fushan , 22 March 1995, Chun-Lin Li, 2 ♀ ( PMSL) . Ilan Co., Rian Jer Spring , 570 m, 12 October 1996, I. Sivec, 4 ♂, 3 ♀ ( PMSL) . Nanton Co., Shihtzuton , 760 m, 25 October 1996, I. Sivec, 3 ♀ ( PMSL) . Nanton Co., W. Tatung, 880 m, 25 October 1996, I. Sivec, 1 ♂ ( PMSL) . Taipei Co., Yangminshan , 500 m, 13 October 1996, I. Sivec, 2 ♀ ( PMSL) . Taipei Co., Fushan , 23 October 1995, Hsu, 9 ♂, 6 ♀ ( PMSL) . Same site, 430 m, 15 October 1996, I. Sivec, 2 ♂, 1 ♀ ( PMSL) . Same site, 23-25 August 1990, Jeng, 2 ♂ ( PMSL) .

Remarks. Uchida & Isobe (1988) redescribed this small brown species in all life stages. Males have an acute, straight or slightly curved, usually pigmented spur on the basal cercal segment and the inner margin of this segment bears a fringe of setae along the apical half of the segment. The female forewing length is generally less than 11 mm and the egg has a distinctive “pine cone” appearance ( Figs. 1-4 ).

Figures

Figs. 1-4. Cryptoperla formosana eggs. 1. Lateral aspect, 2. Oblique aspect anchor pole, 3. Anterior pole, 4. Chorionic plate detail.