Agathiceratidae, as revised, makes up the goniatitid superfamily Agathiceratoidea. Agathiceratidae, which lived from the Upper

Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ...

(Pennsylvanian) to the Middle Permian, combine related genera with subdiscoidal to globular shells that have a small umbilicus and goniatitic sutures and are prominently longitudinally lirate. (Miller ''et al.'' 1960) The explanation for the Agathiceratidae is that for the Agathiceratoidea. Agathiceratidae may have its origin in '' Dombarites'' (Saunders ''et al.'' 1999) which has been removed to the

Delepinoceratidae Delepinoceratidae is one of three families in the Goniatitoidea superfamily. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloid Nau ...

(Furnish ''et al.'' 2009). Delepinoceratidae is now one of two families that make up the

Goniatitoidea Goniatitoidea, formerly Goniatitaceae in older publications, is a superfamily of late Paleozoic ammonoid cephalopods included in the Goniatitida Goniatids, informally goniatites, are Ammonoidea, ammonoid cephalopods that form the order Goniati ...

. In current taxonomy (Furnish ''et al.'' 2009), Agathiceratidae contains '' Agathiceras'', '' Gaetanoceras'', '' Paragathiceras'', and '' Pericleites'' as compared to '' Dombarites'', '' Paracravenoceras'', ''Periclietes'', '' Proshumardites'', and ''Agathiceras'' in Saunders ''et al.'' (1999). ''Paracravenoceras'' is now placed in the Gastroceratoidea, ''Proshunardites'' combined with ''Dombarites'' in the Delepinoceratidae. The two added genera, ''Gaetanoceras'' and ''Paragathiceras'', were considered as equivalent to ''Agathiceras'' in Miller ''et al.'' (1960).

References

* Furnish ''et al.'' 2009; on Carboniferous and Permian Ammonoida; Treatise on Invertebrate Paleontology, Part L revised, ref i
The Paleobiology Database
June 9. * Miller, Furnish, and Schindewolf (1960) ; Paleozoic Ammonoidea, in the Treatise on Invertebrate Paleontology, Part L, Ammonoidea; Geological Soc. of America and Univ of Kansas. * Saunders ''et al.'' 1999, Evolution of Complexity in Paleozoic Ammonoid Sutures, Supplementary Material; Science, Goniatitina Goniatitida families Prehistoric cephalopod families {{Goniatitida-stub

See also

References