Nearly 4000 hybodontoid teeth assignable to the typically Mesozoic genera Acrodus and Polyacro were recovered by bulk-sampling techniques from the Early Permian Wichita-Albany Group in north-central ...

Sharks have been around longer than trees (that’s a fact you’re just going to have to accept, because things get much stranger from here). Alongside other cartilaginous fishes like rays and chimaera, ...

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