Genus Thalerosphyrus Eaton, 1881 Figs 3 B–D6C–D

Remarks.

Thalerosphyrus occurs from China through Southeast Asia to India. This genus is originally described from tropical Southeast Asia. Thalerosphyrus sinuosus Navás, 1933seems to be widely distributed in Thailand and adjacent countries (Nguyen and Bae 2004b). Larvae of Thalerosphyrus are usually the dominant heptageniids in Thai streams as well as those of Afronurus .