Pleuracanthodii

Pleuracanthodii

[plu̇‚rak·ən′thō·dē‚ī]
(paleontology)
An order of Paleozoic sharklike fishes distinguished by two-pronged teeth, a long spine projecting from the posterior braincase, and direct backward extension of the tail.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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