Arietites
Arietites is a genus of massive, giant evolute, psiloceratacean ammonites in the family Arietitidae in which whorls are subquadrate and transversely ribbed and low keels in triplicate, separated by a pair of longitudinal grooves, run along the venter. Fossils are known world wide from the lower Sinemurian stage of the Lower Jurassic. Safari Ltd made an Arietites bucklandi figurine in 2014.
Similar genera include Megarietites in which the keels are reduced and Epammonites in which the ribs are more closely spaced.
Species
Arietites ablongarisArietites alcinoe Reynès, 1879Arietites anastreptoptychus Franz Wähner, 1891 Arietites bisulcatusArietites bonnardii Alcide Dessalines d'Orbigny, 1879Arietites brookeiArietites bucklandi George Brettingham Sowerby, 1816Arietites crossiArietites gaudryi ReynèsArietites geometricus Albert Oppe, 1856Arietites hettangiensisArietites isisArietites longicellus Friedrich August Quenstedt, 1858Arietites meigeni, Arietites meridionalis ReynèsArietites obesulus J. F. Blake, 1876Arietites obtususArietites pinguisArietites planaries Reynès, 1879Arietites quadratus E. Donovan, 1952Arietites radiatus C. T. Simpson, 1843Arietites retroversicostatus CanavariArietites rotiformis SowerbyArietites scunthorpenseArietites semicostatus A. T. Young & Bird, 1828Arietites spiratissimusArietites subsalinarius Wähner, 1891, Arietites tenellus C. T. Simpson, 1855Arietites turneriArieties westfalicus Lange Arietites wichmanni August Rothpletz, 1892Note: Arietites now only represents a purely morphological term. A revision of the genus is still pending, its representatives are therefore initially classified as Coroniceras under Coroniceras .