Review of the Japanese Species of Conchapelopia (Insecta: Diptera: Chironomidae), with Keys to the Known Males and Pupae

Abstract

The Japanese species of the chironomid midge genus Conchapelopia Fittkau, 1957 are reviewed based on a study of the type material and/or recently obtained specimens. The following eight species are recognized as valid: C. japonica (Tokunaga, 1937); C. amamiaurea Sasa, 1990; C. okisimilis Sasa, 1990; C. shikotuensis Sasa, 1990; C. unzenalba Sasa, 1991; C. togamaculosa Sasa and Okazawa, 1992; C. togapallida Sasa and Okazawa, 1992; and C. seiryusetea Sasa, Suzuki, and Sakai, 1998. The male and female imagines of Conchapelopia japonica and C. shikotuensis, and the male imagines of C. okisimilis, C. togamaculosa, and C. togapallida are redescribed, while the immature stages of these species and the female imagines of the latter three species are described for the first time. Reexamination of the holotypes of Conchapelopia amamiaurea, C. unzenalba, and C. seiryusetea has shown that the respective original descriptions contain errors in some diagnostic aspects, which are corrected in this study. Seven previously described taxa are found to be synonyms. Keys to male imagines and pupae of known Japanese species of Conchapelopia are included.