Full reference: T. H. Huxley. 1880. On the application of the laws of evolution to the arrangement of the Vertebrata, and more particularly of the Mammalia. Proceedings of the Zoological Society, London 43:649-662
Parent taxon: Theria according to A. O. Averianov and A. V. Lopatin 2011
See also Asher and Helgen 2010, Asher et al. 2002, Averianov and Archibald 2005, Borths and Stevens 2019, Carroll 1988, Cifelli 1993, Cope 1889, Flower and Lydekker 1891, Gadow 1898, Gardiner 1982, Gregory 1910, Hay 1902, Hooker 1986, Hunt 2011, Huxley 1880, Ji et al. 2002, Kramarz et al. 2010, Lillegraven and McKenna 1986, Luo et al. 2003, Luo et al. 2011, McKenna 1975, Novacek et al. 1997, Parker and Haswell 1897, Prothero and Schoch 1989, Scott 2010, Sloan and Van Valen 1965, Sweetman et al. 2017, Velazco et al. 2022, Vianey-Liaud et al. 2014, Wible 1991 and Wible et al. 2007
Sister taxa: Metatheria, Pantotheria, Paratheria, Patagomaia, Tribotheria
Subtaxa: Acristatherium Adapisoriculidae Ambolestes Asioryctidae Asioryctitheria Bibymalagasia Cimolesta Didymoconida Durlstodon Durlstotherium Endotherium Eomaia Heptaconodon Heptaconodon dubium Holoclemensiidae Horolodectidae Hovurlestes Indoclemensia Juramaia Kennalestoidea Leptictida Meridiungulata Mingotheriidae Montanalestes Mutica Nanocuridae Notopterna Palaeorycteropus Paranyctoides Paraxonia Placentalia Proteutheria Prozalambdalestes Quadripedes Sahnitherium Sazlestes Sinodelphys Taeniodonta Tamirtheria Therictoidea Trogontia Zalambdalestoidea Zhelestidae