Diamesa tokunagai Makarchenko et Yamamoto

Diamesa tokunagai Makarchenko et Yamamoto, 1995: 298; Ashe & O’Connor 2009: 286.

Remarks. The species has been described and known so far only by one male from Japan, is close related to D. alpina and requires additional revision, possibly supported by DNA barcoding.

Distribution. Known only from Honshu Island of Japan (Ashe & O’Connor 2009).