Karagandoceratoidea is an Early Carboniferous (Mississippian) superfamily within the

ammonoid Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ...

order, Goniatitida, said to contain the

Karagandoceratidae The Karagondoceratidae is a small family of tornoceratin Goniatitida from the Lower Carboniferous (early Mississippian) which typifies the Karagandoceratoidea Karagandoceratoidea is an Early Carboniferous (Mississippian) superfamily within th ...

and

Prodromitidae Prodromitidae is one of two families of the superfamily Karagandoceratoidea, a member of the Goniatitida order. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish Cuttl ...

.taxonomy GONIAT-online
/ref>

Analysis

Shells are discoidal to lenticular. Adult stages are oxygonic, having acute venters, or have distinct keels. The ventral lobe may be either bifurcate or trifurcate (two or three pronged) and there is a tendency to increase the number of elements ontogenetically in the suture.

Taxonomic affinities

In the most recent classifications, W.M. Furnish, et al., 2009 and GONIAT theKaraganoceratoidea, is divided into the families

and

, with ''

Karagandoceras ''Karagandoceras'' is an ammonoid genus belonging to the goniatid family Karagandoceratidae that lived during the early Mississippian (lower Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 ...

'', ''Bartzschiceras'' and ''Masonoceras'' included in the Karagandocertidae. Previously, Deiter Korn (2006) included ''Karagandoceras'' along with ''Bartzschiceras'' and ''Masonoceras'' in the subfamily Karagandoceratinae which he included in the

Prionoceratidae Prionoceratidae is one of seven families of the superfamily Prionoceratoidea, a member of the Goniatitida order. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish Cut ...

as part of the

Prionocerataceae Prionoceratoidea is a superfamily in the goniatitid suborder, Tornoceratatina that was extant during the latter Paleozoic. The inclusive taxonomy of the Prionoceratoidea varies according to classification. In some, valid families are the Gatte ...

. Note retention of the—aceae ending. The Prodromitidae is included in the same superfamily. Members of the Karagandoceratidae are probably derived from different members of the Prioceratidae and therefore is an artificial grouping. The Prodromitidae, with which it is included, has been placed in the Prolecanitidain other classifications.Miller, Furnish, and Schindewolf 1957. Paleozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L. Geological Society of America and Univ of Kansas Press

References

Goniatitida superfamilies Tornoceratina {{Goniatitida-stub