Proexochokefalos (meaning "big head with big tuberosities") is an extinct genus of machimosaurid teleosauroid from the Jurassic of France[1] The type species, S. heberti, was originally named "Steneosaurus" heberti by Morel de Glasville in 1876 from a complete skull and mandible (MNHN.F 1890-13) found in the Callovian aged Marnes de Dives near Villers-sur-mer in the Calvados department of Normandy, France.

[2] [3] [4] Steneosaurus depressus is a junior synonym.

Another species referred to the genus, Proexochokefalos cf.

bouchardi is known from remains from the Calcaire de Caen, France, and Reuchenette Formation, Switzerland.

[1]