Monotremata

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Natural sienties → Biologia → Eukaryota → Animalia → Chordata → Mammalia → Monotremata

?Monotremes
Range de fosilus: Frui Kretasi - Resente

Kurti-nasal Ekidne

Siential klasifikatione

Regia:	Animalia
Filum:	Chordata
Klase:	Mammalia
(nonklasifikat)	Australosphenida
Ordine:	Monotremata C.L. Bonaparte, 1837

Families

†Kollikodontidae
Ornithorhynchidae
Tachyglossidae
†Steropodontidae

Monotremes (fro li greki vorde monos 'singli' + trema 'true', referant al kloaka) es mamiferes kel partura oves insted naskiso vivanti yunes kom marsupiales (Metatheria) e plasental mamiferes (Eutheria).