Ancyloceratidae is a family of heteromorphic ammonites that lived during the Early Cretaceous. Their shells begin as a loose spiral with whorls not touching which then turns into a straight shaft that ends in a J-shape hook or bend at end. Coarse ribbing and spines are common. Ancyloceratidae is the type family for the Ancyloceratoidea and of the suborder Ancyloceratina. They are found in Lower Cretaceous, Barremian to perhaps Lower Albian sediments. Genera include: *''

Ammonitoceras ''Ammonitoceras'' is an extinct genus of cephalopod belonging to the ammonite subclass that lived during the latter part of the Early Cretaceous in what is now Europe and the transcaspian region. ''Ammonitoceras'' was named by Dumas, 1876, the ...

'' Dumas, 1876 *''

Ancyloceras ''Ancyloceras'' is an extinct genus of heteromorph ammonites found throughout the world during the Lower Cretaceous, from the Lower Barremian epoch until the genus extinction during the Lower Aptian.Sepkoski, JacSepkoski's Online Genus Database � ...

'' D'Orbigny, 1842 - type genus *'' Ancylotropaeum'' Casey, 1980 *''

Antarcticoceras ''Antarcticoceras'' is a genus of crioconic ammonites in the family Shasticrioceratidae. It lived during the Early Cretaceous Period. ''Antarcticioceras'' fossils can be found in the Cretaceous rocks of Antarctica and South America.M.R.A. Tho ...

'' Thomson, 1974 M.R.A. Thomson, « Ammonite faunas of the Lower Cretaceous of south-eastern Alexander Island », ''British Antarctic Survey Scientific Reports'', 80 (1974), p.1-44. *'' Audouliceras'' Thomel, 1965 *''

Australiceras ''Australiceras'' is an extinct ammonite genus from the upper part of the Early Cretaceous, Aptian stage, included in the family Ancyloceratidae. Description ''Australiceras'' has an evolute shell, coiled with all whorls showing in keeping wit ...

'' Whitehouse, 1926 *'' Caspianites'' Casey, 1961 *'' Epancyloceras'' Spath, 1930 *'' Epitroapeum'' Kakabadze, 1977 *'' Helicancyloceras'' Klinger & Kennedy, 1977 *'' Hoheneggericeras'' Delanoy et al. 2008 *'' Jaubertites'' Sarkar, 1955 *'' Kutatissites'' Kakabadze, 1970 *'' Koeneniceras'' Mikhailova & Baraboshkin, 2002 *'' Laqueoceras'' Kakabadze & Hoedemaeker, 2004 *'' Lithancylus'' Casey, 1960 *'' Luppovia'' Bogdanova et al. 1978 *'' Proaustraliceras'' Kakabadze, 1977 *'' Pseudoancyloceras'' Stenshin et al., 2014 *'' Pseudoaustraliceras'' Kakabadze, 1981 *''

Pseudocrioceras ''Pseudocrioceras'' is an extinct genus of ammonites. The species ''Pseudocrioceras anthulai'' has been found in strata from the Barremian - Aptian age of Chipatá, Santander, Colombia and is known from Georgia and Dagestan. The species ''Pseudo ...

'' Spath, 1924 *'' Sarkariceras'' Vermeulen, 2006 *''

Shastoceras ''Shastoceras'' is a genus of extinct ammonites found in Lower Aptian sediments in Northern California. Although sometimes placed in the Heteroceratidae, a family characterized by a helically wound early portion, its form indicates it more li ...

'' Anderson, 1938 *'' Toxancyloceras'' Delanoy, 2003 *'' Tropaeum'' J. de C. Sowerby, 1837 Ancyloceratidae are derived from the

Crioceratidae The Crioceratidae constitute a family of loosely to closely coiled Ammonitida included in the Ancyloceratoidea that lived during the Early Cretaceous; characterized by '' Crioceratites'' and other genera such as '' Hoplocrioceras'' and '' Parac ...

, a family of Lower Cretaceous ammonites with loosely wound, open planispiral shells, probably originating from within the suborder Lytoceratina.

Notes

References

* Ancyloceratoidea Ammonitida families Hauterivian first appearances Early Cretaceous extinctions {{ammonitida-stub