gnathostome

• Nom désignant un vertébré doté de vraies mâchoires ; groupe important comprenant les poissons, amphibiens, reptiles, oiseaux et mammifères.

A noun referring to a vertebrate animal that possesses true jaws, a major group that includes fish, amphibians, reptiles, birds, and mammals.

1. Jawed vertebrateC2formalscientific

   A vertebrate animal that possesses true jaws, as opposed to jawless vertebrates like lampreys and hagfish.

   Gnathostome

   • Gnathostomes include fish, amphibians, reptiles, birds, and mammals.
   • The evolution of gnathostomes was a major step in vertebrate history.
   • Fossil records show early gnathostomes from the Silurian period.

   Antonymesagnathancyclostome