Ptychodus (from Greek: πτυχή ptyche 'fold' and Greek: ὀδούς odoús 'tooth') [1] is a genus of extinct large durophagous (shell-crushing) lamniform sharks from the Cretaceous period, spanning from the Albian to the Campanian. [2] Fossils of Ptychodus teeth are found in many Late Cretaceous marine sediments worldwide. [3]

Apr 24, 2024 · Scientists didn't know much about Ptychodus, an ancient shark genus, because its remains were usually just fragments. Now, complete fossils reveal its body shape and hunting habits

May 1, 2024 · For paleontologists, the prehistoric shark genus Ptychodus has been dubbed a paleontological mystery — a puzzle missing crucial pieces to truly see the whole picture. But recent discoveries in ...

Ptychodus is a genus of durophagous (shell-crushing) sharks from the Late Cretaceous. Their teeth have been n collected on all continents, including Australia, but occur most often in the sediments deposited in the Western Interior Sea of North America.

The fossils finally confirm that Ptychodus are a type of shark belonging to the Lamniform family, which includes great white sharks. Ptychodus would have dwarfed modern great whites, reaching up to a whopping 9.7 meters (32 feet) in length.

Jun 9, 2015 · Ptychodus was one of the most specialist sharks of the late Cretaceous oceans,‭ ‬as the teeth are adapted for crushing shells rather than tearing through flesh.‭ ‬As such the teeth are rounded rather than being triangular and pointed,‭ ‬and have a series of ridges that run across the surface of the crown.‭ ‬These ridges would ...

Apr 24, 2024 · Six full-body fossils of Ptychodus sharks have been formally analysed for the first time, revealing that they were fast swimmers that preyed on shelled creatures

Dallas thesis on the Ptychodus of the Western Interior Seaway • This talk will use Shawn’s species names and terminology

Jan 21, 2014 · Ptychodus is a genus of durophagous (shell-crushing) sharks from the Late Cretaceous. Their teeth are often found as fossils around the world, but most often in the sediments deposited in the Western Interior Sea of North America.

A restoration of the giant, durophagous shark Ptychodus, courtesy paleo-artist Matt Celeskey. The study of prehistoric sharks is no easy task.