Translingual

Ornithorhynchus anatinus

Proper noun

Australosphenida

1. A taxonomic clade within the class Mammalia – the monotremes and certain extinct species.

Usage notes

This clade was left unranked by the proposers, who do not apply Linnaean hierarchy. It was arguably defined only in order to contain Monotremata and Ausktribosphenida.

Hyponyms

• (clade): Ausktribosphenida (only extinct species), Monotremata (orders)