Reconstruction of Ergetiis ichchi （Courtesy of Carl Buel ） Age Cretaceous（Aptian） 125-113 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Synapsida Order: Docodonta Family: Tegotheriidae Genus: Ergetiis Species: Ergetiis ichchi Morphological description The known fossil material of Ergetiis ichchi consists of two right dentary fragments (holotype: PIN 5614/11; referred specimen: PIN 5614/7), preserving the dentition including premolars and molars, as well as the poster

Reconstruction of Secodontosaurus obtusidens （Image source：Nobu Tamura， CC BY-SA 3.0 ） Age Permian（Artinskian-Kungurian） 285-272.3 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Synapsida Order: Sphenacodontia Family: Sphenacodontidae Genus: Secodontosaurus Species: Secodontosaurus obtusidens Morphological description Secodontosaurus obtusidens is an early synapsid characterized by an exceptionally specialized cranial morphology. Its most striking feature is the unu

Cotylorhynchus romeri （Image source：Nobu Tamura， CC BY-SA 4.0 ） Age Permian（Kungurian） 283-272 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Synapsida Family: Caseidae Genus: Cotylorhynchus Species: Cotylorhynchus romeri Morphological description Cotylorhynchus romeri is a caseid synapsid exhibiting an extremely specialized body plan. Its most striking feature is the combination of a massive body with an exceptionally small skull. The skull is remarkably reduced in