English Cambrian chordate Cited by user Chhandama on 22 Sep 2022 The Cambrian chordates are an extinct group of animals belonging to the phylum Chordata that lived during the Cambrian, between 485 and 538 million years ago.
English Notochord Cited by user Citation bot on 30 Jan 2020 In anatomy, the notochord is a flexible rod formed of a material similar to cartilage.