Karagandoceratoidea

Karagandoceratoidea is an Early Carboniferous (Mississippian) superfamily within the ammonoid order, Goniatitida, said to contain the Karagandoceratidae and Prodromitidae.[1][2]

Karagandoceratoidea
Temporal range: Early Carboniferous
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Goniatitida
Suborder: †Tornoceratina
Superfamily: †Karagandoceratoidea
Librovich, 1957
Synonyms

Karagandocerataceae

Analysis

Shells are discoidal to lenticular. Adult stages are oxygonic, having acute venters, or have distinct keels.[1] 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 [3] and GONIAT[1] theKaraganoceratoidea, is divided into the families Karagandoceratidae and Prodromitidae, with Karagandoceras, Bartzschiceras and Masonoceras included in the Karagandocertidae.

Previously, Deiter Korn (2006)[4] included Karagandoceras along with Bartzschiceras and Masonoceras in the subfamily Karagandoceratinae which he included in the Prionoceratidae as part of the Prionocerataceae. 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.[5]

References
  1. taxonomy GONIAT-online
  2. Paleobiology Database- Karagandoceratoidea
  3. Classification of W.M Furnish et al, 2009
  4. Classification of D. Korn 2006
  5. Miller, Furnish, and Schindewolf 1957. Paleozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L. Geological Society of America and Univ of Kansas Press


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