See list Diptychus is a genus of freshwater ray-finned fish belonging to the family Cyprinidae, the family which includes the carps, barbs and related fishes.

This genus is classified within the subfamily Schizothoracinae,[2] the snow barbels.

[3] The two species in this genus are found in Himalaya and the Tibetan Plateau of China, India, Nepal and Pakistan, ranging west to the Tien Shan Mountains and Central Asia.

[4][5] The type species is the scaly osman, Diptychus maculatus.

Diptychus is up to 70 cm (2.3 ft) in total length.