むかしごかい
- archiannelids of the genus Saccocirrus (esp. Saccocirrus major)word usually written using kana alone
noun (common) (futsuumeishi)
Generated: This term refers to a specific group of segmented worms that belong to the family Archiannelida, known for their small size and unique body structure. They primarily inhabit marine environments and are significant in studies related to ecology and evolution.