Amphitheriidae is a family of Mesozoic mammals restricted to the Middle Jurassic of Britain, with indeterminate members also possibly known from the equivalently aged Itat Formation in Siberia and the Anoual Formation of Morocco. They were members of Cladotheria, more derived than members of Dryolestida, and forming a close relationship with Peramuridae. Amphitheriidae is the only family of the order Amphitheriida.
Classification
Mammalia
Yinotheria (monotremes and relatives) Theriimorpha †Eutriconodonta Theriiformes †Allotheria †Gondwanatheria †Multituberculata Trechnotheria †Spalacotheriidae †Zhangheotheriidae Cladotheria †Meridiolestida Prototribosphenida †Amphitheriidae (here) Zatheria †Peramuridae Tribosphenida various extinct genera Theria Eutheria (placentals and relatives) Metatheria (marsupials and relatives
References
Further reading
Zofia Kielan-Jaworowska, Richard L. Cifelli, and Zhe-Xi Luo, Mammals from the Age of Dinosaurs: Origins, Evolution, and Structure (New York: Columbia University Press, 2004), 14,395. Close RA., Davis BM., Walsh S., Wolniewicz AS., Friedman M. and Benson RB. 2016. A lower jaw of Palaeoxonodon from the Middle Jurassic of the Isle of Skye, Scotland, sheds new light on the diversity of British stem therians. Palaeontology, 59, 155-169