Cheiloceratinae
Cheiloceratinae is one of two Subfamily (biology), subfamilies of the Cheiloceratidae Family (Biology), family, a member of the Goniatitida Order (biology), order. They are an extinction, extinct group of ammonite, 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 Cheiloceratidae {{Goniatitida-stub ...
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Cheiloceratidae
Cheiloceratidae is a family of ammonoid cephalopods included in the goniatitid suborder Tornoceratina in which the suture has 4 to 12 lobes, the ventral one undivided and those in the lateral areas originating as subdivisions of internal and external lateral saddles. Taxonomy The taxonomy of the Cheiloceratidae varies according to the perception of different researchers over time and can be considered a work in progress. That presented in the taxobox is simply one of the more recent. Cheiloceratidae is the larger of two families included in the Cheilocerataceae in the 1957 Treatise Part L, the other being the Tornoceratidae Tornoceratidae is a family of goniatitid ammonoids from the middle and upper Devonian. The family is included in the suborder Tornoceratina and the superfamily Tornoceratoidea. Tornoceratids are subdiscoidal goniatitids with biconvex growth li ....A.K Miller, W.M Furnish, and O.H. Schindewolf, 1957. Paleozoic Ammonoidea. Treatise on Invertebrate Paleon ...
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