Cheiloceratidae

The Cheiloceratidae comprises a family of Late or upper Paleozoic ammonites in which the sutures form 4 to 12 lobes, those in the lateral areas originating as subdivisions of external and internal lateral saddles.

The Paleobiology Database includes the Cheiloceratidae in the Prionoceratoidea, previously Prionocerataceae, along with the Acrocanitidae, Gattendorfiidae, Prionoceratidae, Pseudarietitidae, and Voehringeritidae and includs within it two subfamilies, Cheiloceratinae, and Nehdenitinae.

In contrast GONIAT Online includes the Cheiloceratidae in the Dimeroceratoidea which includes the Dimeroceratidae, Phenacoceratidae, Prolobitidae, and Sinotitidae.

Cheiloceratid genera, in the Dimeroceratoidea, include Cheiloceras, Dyscheiloceras, Melonites, Paratorleyoceras, Puncticeras, Raymondiceras, Staffites, and Torleyoceras.