Monotreme: Pagkakaiba sa mga binago

{{Taxobox

| ordo = '''Monotremata'''

| ordo_authority = [[Charles Lucien Bonaparte|C.L. Bonaparte]], 1837

| subdivision =

†[[Kollikodontidae]]<br/>

[[Ornithorhynchidae]]<br/>

}}

 

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They are conventionally treated as comprising a single order '''Monotremata''', though a recent classification proposes to divide them into the orders [[Platypoda]] (the [[Platypus]] along with its fossil relatives) and [[Tachyglossa]] (the [[echidna]]s). The entire grouping is also traditionally placed into a subclass Prototheria, which was extended to include several fossil orders but these are no longer seen as constituting a natural group allied to monotreme ancestry. A controversial hypothesis now relates the monotremes to a different assemblage of fossil mammals in a [[clade]] termed [[Australosphenida]].