Whatcheeriidae

Rarity: Common

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At a glance

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What Wikipedia says

Whatcheeriidae is an extinct family of stem-tetrapods which lived in the Mississippian sub-period, a subdivision of the Carboniferous period. It contains the genera Pederpes, Whatcheeria, and possibly Ossinodus. Fossils of a possible whatcheeriid have been found from the Red Hill locality of Pennsylvania.

Excerpt from the Wikipedia article “Whatcheeriidae”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: ДиБгд, CC BY-SA 4.0, via Wikimedia Commons.