Reconstruction of Ergetiis ichchi （圖片感謝Carl Buel提供） 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 posterior por

Reconstruction of Secodontosaurus obtusidens （圖片來源：Nobu Tamura，採用  CC BY-SA 3.0  授權） 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 unusual

Cotylorhynchus romeri （圖片來源：Nobu Tamura，採用  CC BY-SA 4.0  授權） 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 siz