Concept
Version 8
Created by Boundless
The Evolution of Craniata and Vertebrata
Clade Craniata
Craniata, including this fish (Dunkleosteus), are characterized by the presence of a cranium, mandible, and other facial bones.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Chordates. October 17, 2013."
http://cnx.org/content/m44685/latest/Figure_29_01_05.jpg
OpenStax CNX
CC BY 3.0.