The Posttornoceratidae are Late Devonian goniatites (Ammonoidea) included in the superfamily Tornocerataceae. The Family, Posttornoceratidae, named by Bogoslovsky in 1962, is based on the genus Posttornoceras, named by Wedekind in 1910, originally included in the Tornoceratidae (sensu Miller et al. 1964). The Posttornoceratidae produced subglobular to discoidal shells with small, closed umbilici and lateral lobes in the suture that are produced adentitiously (i.e. haphazardly) from the first lateral saddles.