Order - Monotremata
Class: Mammalia
Subclass: Prototheria
Order: Monotremata
Name derivation: “single perforation”
Number of known Species: 5
- Family: Ornithorhynchidae (1 species - platypus)
- Family: Tachyglossidae (4 species - echidnas)
Notes: Based on Catalogue of Life as of July 2024