Concise hierarchy

(Kingdom) Animalia - (Phylum) Chordata - (Class) Mammalia

Phylogeny

Node-based clade

Ref: M.A. O'Leary et al., 2013: table S4 (p. 102: "Node-based clade (not a crown clade)").

First representative

†Protictis haydenianus (Cope, 1882)

Ref: M.A. O'Leary et al., 2013: table S2 (p. 87).

Subsequent positions

Pegasoferae (Clade) Nishihara, Hasegawa & Okada 2006

Ref: H. Nishihara et al., 2006: 9933. [implicit]

Current position

Fereuungulata (Clade) Waddell, Cao, Hauf & Hasegawa 1999

Ref: R.J. Asher, 2018: table 7.1 (p. 306); Asher, 2018: fig. 7.1.

Alternative positions

Ostentoria (Clade) Springer, Murphy, Eizirik, Madsen, Scally, Douady, Teeling, Stanhope, de Jong & O'Brien 2007	Ref: M.A. O'Leary et al., 2013: table S4 (p. 102). [implicit]
Pegasoferae (Clade) Nishihara, Hasegawa & Okada 2006	Ref: H. Nishihara et al., 2006: 9933. [new position]

Historical positions

Ostentoria (Clade) Springer, Murphy, Eizirik, Madsen, Scally, Douady, Teeling, Stanhope, de Jong & O'Brien 2007	Ref: M.A. O'Leary et al., 2013: table S4 (p. 102). [implicit]
Pegasoferae (Clade) Nishihara, Hasegawa & Okada 2006	Ref: H. Nishihara et al., 2006: 9933. [new position]

Number of Subtaxa

1989-present	Systema Naturae 2000	[2o]
2006	H. Nishihara et al.: 9933	[2o]