Checklist for PROTOTHERIA
Kingdom ANIMALIA
Animals
Phylum CHORDATA
Chordates
Subphylum VERTEBRATA
Higher Taxon GNATHOSTOMATA
Class MAMMALIA
Mammals
Subclass PROTOTHERIA
Echidna, Platypus
Order MONOTREMATA
Subclass MARSUPIALIA
Marsupials
Subclass EUTHERIA
Placental Mammals
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