In Panderichthids (rhipidistian fish ancestors of amphibians), 2 sets of ossifications are present in the centra region. At posterior end, below the neural arch, are pleurocentra. This element gave ...
By examining megalodon 's vertebral column and comparing it to over 100 species of living and extinct sharks, they determined a more accurate proportion for the head, body, and tail.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback