下か綱こう

noun

infraclass

A taxonomic rank in biology below subclass and above order; used in scientific classification.

• 哺ほ乳にゅう類るいの下か綱こうの一ひとつに有ゆう袋たい類るいが含ふくまれる。

  Marsupials are included in one of the mammalian infraclasses.