Diptychus

{{Short description|Genus of fishes}}

{{Automatic taxobox

| image = Diptychus maculatus Achilles 124.jpg

| image_caption = Diptychus maculatus

| taxon = Diptychus

| authority = Steindachner, 1866{{Cof family|family=Schizothoracinae|access-date=2 January 2024}}

| subdivision_ranks = Species

| subdivision =

See list

| type_species = Diptychus maculatus

| type_species_authority = Steindachner, 1866

}}

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,{{Cof genus|genus-Diptychus|access-date=2 January 2024}} the snow barbels.{{cite web |url=https://www.calacademy.org/scientists/catalog-of-fishes-classification/|title=Eschmeyer's Catalog of Fishes Classification|access-date=2 January 2024|work=Eschmeyer's Catalog of Fishes|publisher=California Academy of Sciences}} 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.{{FishBase genus | genus = Diptychus | month = May| year = 2018}}Li, G.; Y. Tang; R. Zhang; and K. Zhao (2016). Phylogeography of Diptychus maculatus (Cyprinidae) endemic to the northern margin of the QTP and Tien Shan region. BMC Evolutionary Biology 16(1). {{doi|10.1186/s12862-016-0756-3|doi-access=free}} The type species is the scaly osman, Diptychus maculatus. The name is derived from the Greek word di, meaning "two", and the Greek word {{Transliteration|grc|ptyx}}, meaning "fold". Diptychus is up to {{cvt|70|cm|ft}} in total length.