| Clade-based name | : | Monotremata (Clade) Fischer 1823 [Rowe, Bhullar & Wallace 2020] | |
Ref: M.J. Benton, 2015: 442. [inferred] |
| Current rank | : | Monotremata (Order) Bonaparte, 1837 | |
Ref: C.J. Burgin et al., 2020: table 2 (p. 26); 10 Oct 2011. [inferred] |
| Former rank | : | Monotremata (Order) Bonaparte, 1837 | |
Ref: M.J. Benton, 2015: 442. [inferred] |