Orthildaites is a genus of ammonites that lived during the lower Toarcian stage of early Jurassic, during Falciferum subzone.

Shell of these ammonites had quadrate whorl section with broad venter and strong keel in the center.

Almost straight ribs were curving slightly forward at ventrolateral edge.

It has evolved form genus Hildaites and gave rise to Hildoceras from which it differs in morphology by broader whorls and straight ribs.

[2] Only one (or two) species is known in the Toarcian NW European domain, its diversity is higher in the Mediterranean faunal province.