Eutriconodonta

Eutriconodonta is an extinct clade of mammals, mostly from the Mesozoic, whose molars typically bear three cusps aligned in a row.

Mammalia: Mammalia is the clade of vertebrates that includes living mammals and their extinct ancestors. Eutriconodonts are extinct members of the broader mammalian lineage.
Triconodont molar: A triconodont molar has three principal cusps arranged in a longitudinal row. This tooth form gives Eutriconodonta its defining anatomical pattern.
Repenomamus: Repenomamus is a Cretaceous eutriconodont genus from northeastern China, including species among the largest known Mesozoic mammals. Its fossils demonstrate that some eutriconodonts reached substantial body sizes.
Multituberculata: Multituberculata is an extinct mammalian group with distinctive molars bearing multiple rows of cusps. Its molars contrast with the single aligned cusp row typical of eutriconodonts.
Molar (tooth): A molar is a posterior tooth used chiefly for crushing and grinding food. The aligned cusps that characterize eutriconodonts occur on their molars.
Tooth occlusion: Tooth occlusion is the contact between upper and lower teeth during jaw closure. Opposing tooth contacts shaped how eutriconodont molars cut or punctured food.
Gobiconodon: Gobiconodon is a genus of large Mesozoic eutriconodont mammals known from Asia and North America. Its widespread fossils document the group beyond a single region.
Docodonta: Docodonta is an extinct group of Mesozoic mammals with complex molars and a distinctive basin-like structure. Docodont tooth complexity offers a different dental pattern among contemporaneous mammals.
Cusp (tooth): A cusp is a raised point on the chewing surface of a tooth. The number and arrangement of cusps help identify eutriconodont molars.
Mammalian tooth replacement: Mammalian tooth replacement is the developmental process by which teeth erupt and, in most mammals, are replaced once. Replacement patterns help reconstruct eutriconodont growth and distinguish their dental anatomy.

Linked from 1 page