noun
Allotheria
A subclass of extinct Mesozoic mammals; a technical term used in paleontology.
異獣亜綱は中生代に生息していた哺乳類の一群である。
Allotheria is a group of mammals that lived during the Mesozoic era.
A modern scientific coinage from 異 (different), 獣 (beast), 亜 (sub-), and 綱 (class), following standard taxonomic naming conventions.