Monotremes Create Classic editor Talk0 Category page This page needs content. You can help by adding a sentence or a photo. Add to this page!orSearch for "Monotremes" Platypus Monotremes “ Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... List of monotremes and marsupials “ Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... Echidna Pages in category "Monotremes" The following 4 pages are in this category, out of 4 total. List of monotremes and marsupialsMonotremesE EchidnaP Platypus Retrieved from "http://psychology.wikia.com/wiki/Category:Monotremes"