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Temporal range: Upper TriassicOligocene
Ptilodus skull BW.jpg
Skull of Ptilodus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Subclass: Theriiformes
Infraclass: Allotheria

The Allotheria are an extinct infraclass or superorder of mammals. They are related to the prototheria and theria.

The allotheres was a branch of successful Mesozoic mammals. The most important characteristic was the presence of lower molariform teeth with two longitudinal rows of cusps.

Allotheres also had a narrow pelvis, indicating that they gave birth to tiny, helpless young as marsupials do.

The Haramiyida from the Triassic period were the earliest group, and the Multituberculates survived until the Oligocene, 35 million years ago.[1]

References[change | change source]

  1. Butler P.M. 2000. Review of the early allotherian mammals. Acta Palaeontologica Polonica 45(4) 317-342. [1]