Haikouichthys

Extinct genus of jawless fishes

Haikouichthys is an extinct genus of primitive jawless fish that lived during the Cambrian period, 518 million years ago, in what is now the Yunnan Province of China. Alongside Myllokunmingia and Zhongjianichthys, it is considered to be the earliest known vertebrate animal in the fossil record. The type species, Haikouichthys ercaicunensis, was first described in 1999 in addition to its confamilial, Myllokunmingia, and more than 500 specimens were referred to this taxon as of 2003.

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