Cladoselachii

Cladoselachii

[‚klad·ō·sə′lāk·ē‚ī]
(paleontology)
An order of extinct elasmobranch fishes including the oldest and most primitive of sharks.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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