Tetraceratops
Tetraceratops insignis ("four-horned face emblem") is an extinct synapsid from the Early Permian that was formerly considered the earliest known representative of Therapsida, a group that includes mammals and their close extinct relatives. It is known from a single 90-millimetre-long (3.5 in) skull, discovered in Texas in 1908. According to a 2020 study, it should be classified as a primitive non-therapsid sphenacodont rather than a genuine basal therapsid.
| Tetraceratops Temporal range: Early Permian, | |
|---|---|
| Holotype | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Synapsida |
| Clade: | Pantherapsida |
| Genus: | †Tetraceratops Matthew, 1908 |
| Type species | |
| †Tetraceratops insignis Matthew, 1908 | |
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