The Whiteside Museum

of Natural History

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One of the important changes we see in the terrestrial ecosystem transition is the change in soil color. The Clyde is composed of classic Wichita Group gray clays. Our site is gray clay that represents the last of the classic Wichita Group fauna. In the next terrestrial ecosystem, the Arroyo formation of the Clearfork group, the clays are now oxidized and stained blood red. This is a huge ecosystem change. Big fauna change. Effected everybody, and especially Dimetrodons.


From the evidence dating back to the early 1900’s from lots of great Arroyo skeletons and lots of early to mid Waggoner/Clyde skeletons, Dimetrodons evolved pretty quick. In a nutshell, we see...


Texas Highways!

Mary the Dimetrodon!

Whiteside Snippits

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The August edition of Texas Highways magazine is out and guess which little North Texas museum is featured - It's US! We are so proud to be featured this way! Talk about creating some buzz... I would tell you all about it, but then you'd miss the experience of reading it yourself.


Check out the entire article here:

Riches of the Red Beds: Seymour's Whiteside Museum of Natural History