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- 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 Dumas, 1876
* Ancyloceras D'Orbigny, 1842 - type genus
* Casey, 1980
* Antarcticoceras Thomson, 1974
* Thomel, 1965
* Australiceras Whitehouse, 1926
* Casey, 1961
* Spath, 1930
* Kakabadze, 1977
* Klinger & Kennedy, 1977
* Delanoy et al. 2008
* Sarkar, 1955
* Kakabadze, 1970
* Mikhailova & Baraboshkin, 2002
* Laqueoceras Kakabadze & Hoedemaeker, 2004
* Casey, 1960
* Bogdanova et al. 1978
* Kakabadze, 1977
* Stenshin et al., 2014
* Kakabadze, 1981
* Pseudocrioceras Spath, 1924
* Vermeulen, 2006
* Shastoceras Anderson, 1938
* Delanoy, 2003
* Tropaeum J. de C. Sowerby, 1837 Ancyloceratidae are derived from the Crioceratidae, a family of Lower Cretaceous ammonites with loosely wound, open planispiral shells, probably originating from within the suborder Lytoceratina. (en)
- Les Ancyloceratidae sont une famille éteinte d'ammonites. (fr)
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