osteostraci

English Thesaurus

1. extinct group of armored fish-like vertebrates; taxonomy is not clear (noun.animal)

hypernym	:	animal order,
definition	:	the order of animals (noun.animal)

member holonym	:	cephalaspid, osteostracan,
definition	:	extinct jawless fish of the Devonian with armored head (noun.animal)

member meronym	:	order ostracodermi, ostracodermi,
definition	:	extinct group of armored jawless vertebrates; taxonomy is not clear (noun.animal)