Concise hierarchy
(Kingdom) Animalia - (Phylum) Chordata - (Class) Mammalia - (Order) Monotremata
First representative of
Current position
Historical positions
| Prototheria (Clade) Gill 1872 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] |
Ref:
M.A. O'Leary et al., 2013: table S2 (p. 85).
[rough position] |
| †Steropodon (Genus) Archer, Flannery, Ritchie & Molnar, 1985 |
Ref:
Z. Kielan-Jaworowska et al., 2004: table 6.1 (p. 206).
|
| †Steropodon (Genus) Archer, Flannery, Ritchie & Molnar, 1985 |
Ref:
R.M. Nowak, 1991: 9.
|