CLADOENDESIS OF EPHEMEROPTERA
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plesiomorphon Siphlonurus/fg4

palaearcticus Tshernova 1930 [Oniscigaster]

RUSSIA, Khabarovskiy Kray, Evreyskaya Avtonomnaya Oblast' (Joy Autonomous Province), river Kuldur 1 km above mouth of river Sutara, 2 km below Dvurech'e, 19.VIII.2003. Photo and determination by T. Tiunova.

male imago