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What kinds of teeth did palaeonisciform fishes usually have?

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Russian sturgeon (Acipenser gueldenstaedtii) — chondrostean Russian sturgeon (*Acipenser gueldenstaedtii*) swimming along the seafloor of the Black Sea.

Palaeonisciform fishes typically possessed small, needlelike teeth. While this was the general condition for the group, some deep-bodied palaeonisciforms evolved specialized teeth for grinding or cutting.1