Here I go using some more big words...
Actinocerids are characterized by usually having cyrtochoanitic septal necks, convex/bulbous connecting rings, annulosiphonate endosiphuncular deposits with canals running radially from a central hollow, and cameral deposits that can show up on all sides of the chamber.
alot of times the only thing preserved is the siphuncle which would basically look like a straight string of pearls.
below is a photo of a longitudinal section of Rayonnoceras, an actinocerid from the Mississippian of Utah. Rayonnoceras was one of the last of the actinocerids, they are more a Silurian to Devonian ceph.
Actinocerids are characterized by usually having cyrtochoanitic septal necks, convex/bulbous connecting rings, annulosiphonate endosiphuncular deposits with canals running radially from a central hollow, and cameral deposits that can show up on all sides of the chamber.
alot of times the only thing preserved is the siphuncle which would basically look like a straight string of pearls.
below is a photo of a longitudinal section of Rayonnoceras, an actinocerid from the Mississippian of Utah. Rayonnoceras was one of the last of the actinocerids, they are more a Silurian to Devonian ceph.