The Karagondoceratidae is a small family of tornoceratin
Goniatitida
Goniatids, informally goniatites, are Ammonoidea, ammonoid cephalopods that form the order Goniatitida, derived from the more primitive Agoniatitida during the Middle Devonian some 390 million years ago (around Eifelian stage). Goniatites (goniat ...
from the
Lower Carboniferous (early Mississippian) which typifies the
Karagandoceratoidea
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 ...
, in which it is included.
Karagandoceratids are characterized by discoidal to lenticular shells that are oxyconic or keeled in the adult and in which the ventral lobe of the suture is ontogenetically subdivided, either trifurcated or bifurcated.
The known genera are ''
Bartzschiceras'', ''
Karagandoceras'', and ''
Masonoceras'', and possibly ''
Voehringerites''
References
taxonomy GONIAT-onlinePaleobiology Database - Karagandoceratidae
Goniatitida families
Karagandocerataceae
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