獣じゅう亜あ綱こう

noun

Theria (mammalian subclass)

Taxonomic term used in zoology and paleontology. Refers to the subclass of mammals that give birth to live young without a shelled egg, including marsupials and placentals.

• 獣じゅう亜あ綱こうは有ゆう袋たい類るいと有ゆう胎たい盤ばん類るいを含ふくむ。

  Theria includes marsupials and placental mammals.