see text Acanthoceratoidea, formerly Acanthocerataceae, is a superfamily of Upper Cretaceous ammonoid cephalopods belonging to the order Ammonitida, and comprising some 10 or so families.

[1] Families included in the Acanthoceratoidea[1] are: According to Wright Calloman and Howarth, 1996[2] in the revised version of Part L of the Treatise, the Binneyitidae is replaced by the Forbesiceratidae with the Binneyitidae now in the Hoplitaceae and the Forbesiceratidae included in the Acanthoceratoidea.

The Leymeriellidae, based on the Lower Albian genus, Leymeriella, was added, extending the range downward.

The Libycoceratidae, proposed by Zaborski, 1982, for the Upper Campanian - Maastrictian Libycoceras, was split off from the Sphenodiscidae.

The replacement of the Tissotiidae by the Pseudotissotiidae in the revised classification of the Acanthoceraticeae in the Treatise (1996) is based on the earlier appearance of the subfamily Psudotissotiinae in the Lower Turonian, followed by the Tissotiinae in the Upper Turonian.