Semionotidae
plural noun
Sem·i·o·noti·dae
| \ -ˈnät-\
Definition of Semionotidae
: a family of extinct Triassic ganoid fishes from America, Europe, and Africa that have a deep body, small mouth with teeth adapted chiefly to grinding or crushing, and rhomboid scales and that are often considered ancestral to the present-day freshwater gars
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