Dimetrodon


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Related to Dimetrodon: edaphosaurus

Dimetrodon

 

an extinct genus of predatory mammal-like reptiles of the order Pelycosauria. The Dimetrodon, which grew up to 2.7 m, had dorsal vertebrae with very long spiny appendages, projecting from the dorsal surface and serving, perhaps, to stretch the membrane (dorsal sail), the purpose of which is unclear. There were some ten species. Remains of the Dimetrodon are known from the Permian deposits of North America.

REFERENCE

Osnovy paleontologii: Zemnevodnye, presmykaiushchiesia i ptitsy. Moscow, 1964.
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Bakker's team has dug up 39 Dimetrodon specimens, but only one each of Edaphosaurus and Diadectes--large herbivores thought to be prime Dimetrodon cuisine.
The researchers found loads of Dimetrodon teeth buried amid the chewed-up bones.
Caption: The ancient amphibian Diplocaulus probably served as a prime food source for Dimetrodon, which chomped bites out of the aquatic animals' snouts, as shown in this Diplocaulus fossil.
According to the study, ziphodont teeth, with their serrated edges, produced a more-efficient bite and would have allowed Dimetrodon to eat prey much larger than itself.
While most meat-eating dinosaurs possessed ziphodont teeth, fossil evidence suggested serrated teeth first evolved in Dimetrodon some 40 million years earlier than theropod dinosaurs.
The course of the nasolacrimal duct within the nasal cavity is indicated in Dimetrodon by a shallow groove that continues from the anterior end of the lacrimal bone to the septomaxillary bone.
A top predator in the basin's food chain was likely Dimetrodon, a carnivorous reptile whose fossils were found in Europe for the first time at this quarry, Berman notes.
I was too busy watching that Liopleurodon batterin' thae Dimetrodons.