Explore Map Collection

Check out our basemaps

Print a Map Plus

Generate a high-quality PDF

Discover local flora, fauna, geology, and more

Local Flora & Fauna

Learn the ecology of your area

Learn the geologic formation at your feet

Get Started or Sign In

Start Free Trial to View Full Ptychodus Map

Rock Formations

Measure

Copyright © Natural Atlas | Roads, Buildings © OSM Contributors | Data Sources

Topo

Ecoregions

Public Lands

...

BASEMAPS

Default Weather

Temperature

Smoke

...

WEATHER

View All Photos

Ptychodus

genus

Sensitive Classification

Fossils are sensitive in nature and should not be collected unless it is done legally and responsibly. Vertebrate fossils are illegal to collect on public lands.

On the Web

On Wikipedia

Ptychodus is a genus of extinct sharks. As well as a genus of durophagous (shell-crushing) sharks from the Late Cretaceous. Fossils of Ptychodus teeth are found in many Late Cretaceous marine sediments. There are many species among the Ptychodus that have been uncovered on all the continents around the globe. Such species are Ptychodus mortoni, P. decurrens, P. marginalis, P. mammillaris, P. rugosus and P. latissimus to name a few. They died out approximately 85 million years ago in the Western Interior Sea, where a majority of them were found. A recent publication found that Ptychodus are likely neoselachians, rather than hybodonts or batoids as previously thought. Their life history coincides with the typical life of many other large sharks: they live long lives, they produce large…

Read More on Wikipedia

Your Checklist

You have noted 0 Ptychodus

Learn How to Take A Field Note

Range Map

Range Maps show field notes recorded by Natural Atlas contributors and other datasets via GBIF.org

Formations Found In

Purgatoire Formation

Eolian deposits (COQe;0)

Dakota Sandstone and Purgatoire Fm (COKdp;0)

Dakota Sandstone

Chinle Formation

Join Natural Atlas to keep track of the what you see on your outings.

Join Natural Atlas

Already have an account?

Top Observers

Tip

There aren’t any top observers right now. Be the first by noting a Ptychodus out in the field.

Ptychodus

Ptychodus

Ptychodus