order Ostracodermi
Also found in: Thesaurus.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Switch to new thesaurus
| Noun | 1. | order Ostracodermi - extinct group of armored jawless vertebrates; taxonomy is not clear animal order - the order of animals Agnatha, superclass Agnatha - superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms ostracoderm - extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic Heterostraci, suborder Heterostraci - extinct group of armored jawless fishes or fish-like vertebrate; taxonomy is not clear Cephalaspida, Osteostraci, suborder Cephalaspida, suborder Osteostraci - extinct group of armored fish-like vertebrates; taxonomy is not clear |