出典:Wikipedia
出典:『Wikipedia』 (2009/10/15 05:47 UTC 版)
Armatites is a genus belonging to the Aulatornoceratinae subfamily, a member of the Goniatitida order. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids.