Definitions

1. noun

A fossil or fossilized remains of an extinct fish with a mouth and jaws formed from the lower jaw of a more primitive fish, especially a placoderm or a chondrichthyan.

“The fossil discovered in the excavation was an early example of stomatomy, dating back to the Devonian period.”

2. noun

In some classifications, the name used for a type of extinct jawed fish, particularly the class Chondrichthyes.

“The classification system used by the paleontologist included stomatomy as a distinct group of ancient fish.”