Dimeroceratinae is one of three subfamilies of the Dimeroceratidae family, 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. References The Paleobiology Database accessed on 10/01/07 Dimeroceratidae Devonian first appearances Devonian extinctions