scinewscom:Permian-Period Shark Had Petal-Shaped Teethwww.sci-news.com/paleontology/petalodus
scinewscom:Permian-Period Shark Had Petal-Shaped Teethhttp://www.sci-news.com/paleontology/petalodus-ohioenesis-10032.html -- source link
#reblog#paleontology#petalodus#petalodontidae#petalodontiformes#holocephali#chondrichthyes#cartilaginous fish