Ancyloceratoidea, formerly Ancylocerataceae, is a superfamily of typically uncoiled and loosely coiled heteromorph ammonoids established by Alpheus Hyatt in 1900, that may contain as many as 11 families, depending on the classification accepted.

[1] 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.

The Treatise on Invertebrate Paleontology, Part L, placed the Ancylocerataceae in the suborder Lytoceratina along with the Lytocerataceae, Turrilitaceae, and Scaphitaceae, with superfamily endings as then used.

[1] The Ancyloceratoidea is now generally accepted as being within the separate suborder from the Ammonitida, the Ancyloceratina established by Wiedmann in 1966.

Ancyloceratoidea was renamed from Ancylocerataceae to accordance with the ICZN which gives invertebrate superfamilies the name suffix which was formerly used for subclasses.