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Ganoidei 1

Definition: One of the subclasses of fishes. They have an arterial cone and bulb, spiral intestinal valve, and the optic nerves united by a chiasma. Many of the species are covered with bony plates, or with ganoid scales; others have cycloid scales.

Ganoidei 2

Definition: a group of mostly extinct primitive bony fishes characterized by armor-like bony scales

 

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