Ptilodontoidea

Belongs within: Cimolodonta. The Ptilodontoidea are a group of multituberculate mammals known from the Upper Cretaceous to the Eocene of Eurasia and North America, characterised by a very large, arcuate lower rear premolar protruding dorsally above the level of the molars (Kielan-Jaworowska & Hurum 2001). Characters (from Kielan-Jaworowska & Hurum 2001): Dental formula 2.0.4.2/1.0.2.2; enamel… Continue reading Ptilodontoidea

Cimolodonta

Belongs within: Multituberculata.Contains: Ptilodontoidea, Djadochtatherioidea. The Cimolodonta are a group of multituberculate mammals known from the Early Cretaceous to the Eocene, including all multituberculates to survive the end of the Cretaceous (Kielan-Jaworowska & Hurum 2001). Characters (from Kielan-Jaworowska & Hurum 2001): Enamel prismatic; dental formula 2.0.1–4.2/1.0.1–2.2; I1 absent, I2 single- or two-cusped, I3 small, single-cusped;… Continue reading Cimolodonta

Multituberculata

Belongs within: Mammalia.Contains: Paulchoffatiidae, Cimolodonta. The rise and fall of the multi-cusped Published 12 April 2011 The extinction event at the end of the Cretaceous is often seen as something of a changing of the guard: the old Mesozoic fauna was swept away, leaving the world open for the (eventual) rise of our modern Caenozoic… Continue reading Multituberculata