Prototheria facts for kids
Temporal range: Upper Triassic – Recent
The Prototheria is a former subclass of mammals, now no longer in use. The name comes from Greek prōtos means 'first', and thēr, 'beast'. The only surviving animals in this subclass are the Monotremes.
Evidence is accumulating that the Prototheria is not a natural group, but alternative suggestions are not yet agreed.
Prototheria Facts for Kids. Kiddle Encyclopedia.