Metatheria (Translingual) comes from Ancient Greek θηρίον, from Ancient Greek θήρ, from Proto-Hellenic kʷʰḗr, from Proto-Indo-European ǵʰwer- — wild; wild animal.
Metatheria (Translingual): infraclass
Definitions
infraclass
Ancestry of “Metatheria”, step by step
Metatheria traces back through two separate lines of ancestry.