Allocotoceras is an endocerid from the Lower Ordovician (upper Canadian) of Australia (Tasmania), included in the Endoceratidae, based on small, straight or gently curved siphuncles.
Intejocerida is the name given to a group of generally straight shelled nautiloid cephalopods originally found in Lower and Middle Ordovician sediments in the Angara River basin in Russia; defined in the Treatise as an order, and combined there with the Endocerida in the Endoceratoidea.