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Order Monotremata


Domain Eukarya
Kingdom Animalia
Sub-kingdom Eumetazoa
Sub-sub-kingdom Bilateria
Metaphylum Enterocoelous Coelomates
Phylum Chordata
Subphylum Vertebrata
Class Mammalia
Subclass Prototheria

Order Monotremata

This group contains the egg-laying mammals, the extant species being the platypus and echidnas. Greek: monos, single + trema, hole. (Dorit et al, 1991)