Unlike other mammals the Monotreme (order Montremata) lay eggs and have no teats. Milk is provided for their young via secretion by the many pores on the female’s belly.

Today, there are 5 living species of Monotremes:

  • Duck-billed Platypus
  • Short-beaked Echidna
  • Sir David’s Long-beaked Echidna
  • Eastern Long-beaked Echidna
  • Western Long-beaked Echidna

  • Scientific classification
  • Kingdom: Animalia
  • Phylum: Chordata
  • Class: Mammalia
  • Infraclass: Australosphenida
  • Order: Monotremata
  • Subgroups:
    • Ornithorhynchidae
    • Tachyglossidae

The listed subgroups does not include the extinct groups.

Footnote & References

  1. Monotreme, Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Monotreme (last visited July 16, 2021).