Amphitheriidae Temporal range: Middle Jurassic, 174.7–161.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Clade:	Prototribosphenida
Order:	†Amphitheriida Prothero, 1981
Family:	†Amphitheriidae Owen, 1846
Genera
†Amphitherium †Palaeoxonodon

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.^[1] 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