Petalodus sp.
shark tooth

General abundance:  Rare

CLASS : CHONDRICHTHYES
SUBCLASS : ELASMOBRANCHII
ORDER : Petalodontiformes
FAMILY : Petalodontidae
GENUS : Petalodus sp.

Reference:
Fossils of Ohio - Bulletin 70
      pages 308-309 fig. 3
      pages 310-311 fig. 1-3

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Pennsylvanian Fossils of Missouri