単たん弓きゅう類るい

noun

synapsids; theropsids

Modern paleontological term for the group that includes mammals and their extinct relatives. Used in scientific contexts.

• 単たん弓きゅう類るいは哺ほ乳にゅう類るいの祖そ先せんを含ふくむグループです。

  Synapsids are a group that includes the ancestors of mammals.

noun

mammal-like reptiles

Obsolete term formerly used for non-mammalian synapsids. Replaced by '単弓類' in modern taxonomy.

See also: 哺乳類型爬虫類

• かつて「哺ほ乳にゅう類るい型がた爬は虫ちゅう類るい」と呼よばれたグループは、現げん在ざいでは単たん弓きゅう類るいに分ぶん類るいされます。

  The group once called 'mammal-like reptiles' is now classified as synapsids.