Amphitheriida
Amphitheriida (nomen a Prothero anno 1981) est ordo mammalium animalium.

Systema taxinomicum animalis 
 Imperium: Eukaryota
 Regnum: Animalia 
 Subregnum: Bilateria
 Supraphylum: Deuterostomia 
 Infraphylum: Chordonia 
 Phylum: Chordata 
 Subphylum: Vertebrata 
 Infraphylum: Gnathostomata 
 Supraclassis: Tetrapoda
 Infraclassis: Amniota
 Ramus: Mammaliaformes
 Classis: Mammalia 
 Subclassis: Theriiformes 
 Supralegio: Trechnotheria 
 Legio: Cladotheria 
 Sublegio: † Dryolestoidea 
 Ordo: † Amphitheriida (Prothero, 1981)
 Familia: † Amphitheriidae

Notae
 McKenna, M.C. & Bell, S.K. 1997. Classification of Mammals Above the Species Level. Columbia University Press, New York.: i-xii, 1-631.
 Storer, T.I., Usinger, R.L., Stebbins, R.C. & Nybakken, J.W. 1979. General Zoology, Sixth Edition. McGraw-Hill Book Company, New York.: i-ix, 1-902.
 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.

Nexus externi
 Amphitheriida apud Systema Natura

Mammalia exstincta
Taxa Prothero
Taxa 1981