| Rank-based name | : | Monotremata (Division) Bonaparte, 1837 | |
Ref: M.J. Benton, 2015: 442. [inferred] |
| Rank-based name | : | Monotremata (Order) Bonaparte, 1837 | |
Ref: C.J. Burgin et al., 2020: table 2 (p. 26); 10 Apr 2025. [inferred] |
| Unestablished (clade) name | : | Monotremata (Clade) Bonaparte 1837 [Rowe 1988], nom. cl. inval. | |
Ref: T.B. Rowe et al., 2020: [875]; 10 Apr 2025. [inferred] |