Echioceratidae

Echioceratidae is an extinct family of ammonites that lived during Sinemurian stage of Early Jurassic.

[1] Ammonites belonging to this family are characterised by serpenticone shells with a keel, which can be surrounded by grooves if a species is densely ribbed and compressed.

The whorl section is either circular or has flat sides.

The initial ontogenical stage of these ammonites is typically smooth but very short.

[1] Following genera are members of this family:[1] Fossils of species within this family have been found in the Jurassic rocks of north Africa, South and North America, Europe and Asia.