This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
The Quarterly journal of the Geological Society of London . IN THE ORDER SAUROPTERYGIA ' but contribute as in Plesiosaurus the mesial border of those vacuities and articulate underlapping it with the hinder end of the episternum The proportional characters of this element are given in figs In thus determining the homologies