Phylloceratidae is the predominant family of the Phylloceratina with some 15 or more genera found in rocks ranging from the Lower Jurassic to the Upper Cretaceous.

Sutures are complex with the major and minor branches of the saddles with phylloid or spatulate endings.

[1] The Phylloceratidae are probably derived from the Late Triassic Discophyllitidae by increasing the sutural complexity and evolving involute coiling.

Later, phylloceratids are said to have given rise to Cretaceous Ammonitina included in the Desmoceratoidea, Hoplitoidea, and Acanthoceratoidea.

Intervening lobes are variably branched with thornlike or spinose terminations as viewed in plan.