Dianchi Carp (Cyprinus micristius)
The Dianchi Carp was described in 1906; it is, or rather was, endemic to lake Dianchi in Yunnan, China.
The species was last seen in the 1960s and is now very likely extinct; it is said, however, that the tributaries of Lake Dianchi are maybe inhabited by one or more subspecies that might be still existing.
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syn. Mesocyprinus micristius (Regan)
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edited: 18.05.2022