Monotreme

Monotremes (frae the Greek μονός monos "single" + τρῆμα trema "hole", referrin tae the cloaca) are mammals that lay eggs (Prototheria) insteid o givin birth tae live young lik marsupials (Metatheria) an placental mammals (Eutheria).

Monotremes[1] Temporal range: Late Triassic[2] – Holocene, 210–0 Ma PreЄ Є O S D C P T J K Pg N
A short-beaked echidna, a platypus, a Steropodon reconstruction, an a wastren lang-beaked echidna
Scientific classification
Kinrick:	Animalia
Phylum:	Chordata
Cless:	Mammalia
Subcless:	Prototheria
Order:	Monotremata C.L. Bonaparte, 1837[3]
Subgroups
†Kryoryctes? †Steropodontidae Platypoda Ornithorhynchidae Tachyglossa Tachyglossidae