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Definition of Osteostracan
1. Noun. Extinct jawless fish of the Devonian with armored head.
Exact synonyms: Cephalaspid
Generic synonyms: Agnathan, Jawless Fish, Jawless Vertebrate
Group relationships: Cephalaspida, Osteostraci, Suborder Cephalaspida, Suborder Osteostraci
Generic synonyms: Agnathan, Jawless Fish, Jawless Vertebrate
Group relationships: Cephalaspida, Osteostraci, Suborder Cephalaspida, Suborder Osteostraci