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Ostracoderm

Ostracodermi (lit. 'shell-skins') or ostracoderms is an informal group of vertebrate animals that include all armored jawless fish of the Paleozoic Era. The term does not often appear in classifications today because it is paraphyletic (excluding jawed fishes and possibly the cyclostomes if anaspids are closer to them) and thus does not correspond to one…

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Ostracoderm

Nodes26
Edges25
Triples3
Avg. degree1.92
Density0.076923
Components1

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ostracoderms fish armored used groups respiration heterostracans cephalaspids ostracodermi informal group jawless term jawed fishes one use feeding gill along

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SubjectPredicateObjectConfidenceSrc
catfishinstance ofHe compared them at first with extant armored fish0.80text
sturgeoninstance ofHe compared them at first with extant armored fish0.80text
but later realized that they lacked movable jawsinstance ofHe compared them at first with extant armored fish0.80text

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