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suborder Heterostraci

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ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.suborder Heterostraci - extinct group of armored jawless fishes or fish-like vertebrate; taxonomy is not clear
animal order - the order of animals
order Ostracodermi, Ostracodermi - extinct group of armored jawless vertebrates; taxonomy is not clear
heterostracan - extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian


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