Just out, by Romain Vullo @GeosciencesR @OSURennes and collaborators. 🦈🐚Exceptionally preserved shark fossils from Mexico elucidate the long-standing enigma of the Cretaceous elasmobranch Ptychodus - @royalsociety #fossilshark #Mexico #tooth royalsocietypublishing.org/doi/10.1098/rs…
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