Sactorthoceras

Systematic Paleontology Order Orthocerida Family Sactorthoceratidae Genus Sactorthoceras

Sactorthoceras is a mid Ordovician genus and type for the Sactorthoceratidae. Shells are smooth or striated, straight or slightly curved longicones with a slender, empty, subcentral suborthochoanitic siphuncle that expands slightly into the chambers of the phragmocone. Also. lacks cameral (chamber) deposits.

Sactorthoceras fossils have been found in New York state in the U.S., Korea, and Norway.

References: Walter C. Sweet, 1964. Nautiloidea - Orthocerida Treatise on Invertebrate Paleontology, Part K.