Concise hierarchy

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

Phylogeny

Paraphyletic/Ancestral (para)

Ref: A.O. Averianov & A.V. Lopatin, 2011: 34.

Current position

Boreosphenida (Clade) Luo, Cifelli & Kielan-Jaworowska 2001

Ref: K.D. Rose, 2006: table 1.2 (p. [9]); Martinelli et al., 2021: fig. 7; Ni et al., 2016: fig. 4. [implicit]

Alternative positions

Boreosphenida (Subclass) Luo, Cifelli & Kielan-Jaworowska, 2001	Ref: K.D. Rose, 2006: table 1.2 (p. [9]); Martinelli et al., 2021: fig. 7; Ni et al., 2016: fig. 4.
†Tribotheria (Legion) Butler, 1978	Ref: A.O. Averianov & A.V. Lopatin, 2011: 34.

Historical positions

†Tribotheria (Legion) Butler, 1978	Ref: A.O. Averianov & A.V. Lopatin, 2011: 34.
Boreosphenida (Subclass) Luo, Cifelli & Kielan-Jaworowska, 2001	Ref: K.D. Rose, 2006: tables 1.2 (p. [9]), 4.1.
Boreosphenida (Subclass) Luo, Cifelli & Kielan-Jaworowska, 2001	Ref: Z. Kielan-Jaworowska et al., 2004 (alt.): table 1.1 (p. 14).
Boreosphenida (Subclass) Luo, Cifelli & Kielan-Jaworowska, 2001	Ref: Z. Kielan-Jaworowska et al., 2004: tables 1.2 (p. [17]), 11.1 (p. 411). [new position]

Number of Subtaxa

2025	Available in Systema Naturae 2000	†1f;3g;3s
1989-present	Systema Naturae 2000: 25 Mar 2022	[; †1f;3g;3s]
2004	Z. Kielan-Jaworowska et al.: table 11.1 (p. 411)	[; †1f;3g;3s]