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

Carboniferous The Carboniferous ( ) is a Geologic time scale, geologic period and System (stratigraphy), system of the Paleozoic era (geology), era that spans 60 million years, from the end of the Devonian Period Ma (million years ago) to the beginning of the ...

(Pennsylvanian) to the Middle

Permian The Permian ( ) is a geologic period and System (stratigraphy), stratigraphic system which spans 47 million years, from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.902 Mya. It is the s ...

, 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 ''Dombarites'' is a genus belonging to the goniatitid family Agathiceratidae; extinct ammonoids which are shelled cephalopods more closely related to squid, octopus and other coleoids than to the superficially similar ''Nautilus'' According to ...

'' (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 ammonoid cephalopods that form the order Goniatitida, deriv ...

. In current taxonomy (Furnish ''et al.'' 2009), Agathiceratidae contains ''

Agathiceras ''Agathiceras'' is a subglobose goniatitida, goniatitid from the family Agathiceratidae, widespread and locally abundant in Lower Pennsylvanian to Middle Permian sediments, e.g. the Urals, Sicily, and Texas (Blaine Formation). ''Agathiceras'', n ...

'', '' Gaetanoceras'', '' Paragathiceras'', and '' Pericleites'' as compared to ''

'', '' 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 The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authore ...

, 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