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Ancyloceratoidea, formerly Ancylocerataceae, is a superfamily of typically uncoiled and loosely coiled heteroomorph ammonoids established by Hyall, 1900, that may contain as many as 11 families, depending on the classification accepted. == Taxonomy == The taxonomy content, families, of the Ancycloceratoidea has grown over the year, partly with the addition of newly defined families and partly with the moving of families from other superfamilies. Arkell, ''et al'' (1957) in the Treatise Part L included just the Ancyloceratidae Meek 1876, Bochianitidae Spath 1922, Hemihoplitidae Spath 1924, and Heteroceratidae Hyatt 1900 within the Ancylocerataceae. The Crioceratitidae Wright 1952 was considered a subfamily, the Crioceratitinae, within the Ancycloceratidae, the other being the Ancyloceratinae.〔 Families recognized in the Treatise and subsequently removed to the Ancycloceratoidea from other taxa include the Ptychoceratidae Meek 1876, Macroschaphitidae Hyatt 1900, and Labeceratidae Spath 1925. Those established since include the Acrioceratidae Vermeulen 2004, Himantoceratidae Dimitrova 1970, Leptoceratoididae Thieuloy 1966. The Treatise on Invertebrate Paleontology, Part L, placed the Ancyloceratacea in the suborder Lytoceratina along with the Lytocerataceae, Turrilitaceae, and Scaphitaceae, with superfamily endings as then used. The Ancyloceratoidea is now generally accepted as being within the separate suborder from the Ammonitida, the Ancyloceratina established by Wiedmann 1966. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ancyloceratoidea」の詳細全文を読む スポンサード リンク
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