Monotremata†Kryoryctes cadburyi
122 Mya
Monotremata | Kollikodontidae†Kollikodon ritchiei
99.6 Mya
Monotremata | Ornithorhynchidae†Teinolophus trusleri
122 Mya
Monotremata | Ornithorhynchidae†Steropodon galmani
99.6 Mya
Monotremata | Ornithorhynchidae†Monotrematum sudamericanum
66.0 Mya
Monotremata | Ornithorhynchidae†Obdurodon spp.
28.4-5.33 Mya
Monotremata | OrnithorhynchidaeOrnithorhynchus anatinus duck-billed platypus
NT
Monotremata | Tachyglossidae†Megalibgwilia spp.
5.33-2.59 Mya
Monotremata | Tachyglossidae†Murrayglossus hacketti Hackett's giant echidna
2.59 Mya
Monotremata | Tachyglossidae†Zaglossus robustus
5.33-2.59 Mya
Monotremata | TachyglossidaeZaglossus bruijnii western long-beaked echidna
CR
Monotremata | TachyglossidaeZaglossus attenboroughi Sir David's long-beaked echidna
CR
Monotremata | TachyglossidaeZaglossus bartoni eastern long-beaked echidna
VU
Monotremata | TachyglossidaeTachyglossus aculeatus short-beaked echidna
LC