Claassenia radiata (Klapálek)

Stark, Bill P. & Sivec, Ignac, 2010, Systematic Notes On The Genus Claassenia Wu (Plecoptera: Perlidae), With Description Of A New Species, Illiesia 6 (24), pp. 303-314 : 306

Claassenia radiata (Klapálek)

( Figs. 12-13 )

Adelungia radiata Klap{lek, 1916:78 . Holotype ♂ ( NMNH), Manchuria

Claassenia radiata: Wu, 1938:144 .

Acroneuria manchuriana Banks, 1920:315 . Lectotype ♂ ( USNM), Yalu River , Manchuria / Korea. New synonymy

Material examined. China: Manchuria , 1♂ ( radiata holotype, NMNH) . Manchuria and Korea: Yalu River , 150-200 miles from mouth, May 1914, A. DeC. Sowerby, 1♂ ( manchuriana lectotype, USNM) . Same data, 1♂ ( USNM) .

Adult habitus. Color pattern obscured by specimen condition. The following details are extracted from Banks (1920) description of C. manchuriana . Head mostly dull yellowish but ocellar area connected by a black V-mark. Abdomen dark above and yellow brown ventrally. Wings and veins brown.

Male. Macropterous, forewing length 22-25 mm. Hemitergal lobes slender, finger-like and more or less cylindrical for most of length in both dorsal ( Fig. 12 ) and lateral ( Fig. 13 ) aspect; dorsal margin bearing a few sensilla basiconica. Tergum 9 armed with a field of small sensilla basiconica scattered over mesal hump; a smaller patch of sensilla basiconica occurs on tergum 8. Aedeagus a slender, membranous cylinder armed mid-ventrally with a patch of microtrichia and armed dorsolaterally with a sparse field of fine setal spines beyond midlength.

Female. The following data are extracted from Banks (1920). Forewing length about 28 mm (wing expanse 60 mm). Subgenital plate slightly concave and projecting little beyond posterior margin of sternum 8.

Larva. Unknown.

Comments. The type series of C. radiata and C. manchuriana are from the same region and our study of the male types of both species indicate they are morphologically indistinguishable. Consequently, we place C. manchuriana as a junior synonym of C. radiata . The type series for C. manchuriana includes, according to Banks (1920) “ six specimens ” all from the same site, and at least one of these is a female. In 1974, one of us (BPS) studied a specimen bearing a type label which has been regarded as the holotype of C. manchuriana . Although apparently no other USNM specimen from this series bears such a label, we designate the male specimen from the USNM series bearing the “type” label as lectotype in order to provide stability for this name. We have seen only the lectotype and one additional male from the USNM; the female specimen may have been lost.

Figures

Figs. 12-13. Claassenia radiata holotype structures. 12. Male genitalia, dorsal. 13. Male hemitergum, lateral.