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a large non-amniote reptiliomorph (Diadectidae) that lived at the same time
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Dingess Petroglyph Site Excavated
An element of the median oral plates (that would correspond to the lower lip or chin in gnathostomes) extends out in a long rod-shaped appendage
Isotelus iowensis, trilobite (Replica) Pteranodon a large non-amniote reptiliomorph (Diadectidae)This is an enlarged replica of Isotelus iowensis based of a specimen from the Ordovician Trenton Group, Trenton Falls, New York. Trilobites are very well known, and possibly the second most famous fossil group after the dinosaurs with some 15,000 known species. Trilobites are extinct arthropods that form the class Trilobita. They appeared at the start of the Cambrian period and flourished throughout the lower Paleozoic era before beginning a drawn out