Paradeshayesites

Paradeshayesites is an extinct genus of cephalopod belonging to the Ammonite subclass.

Biostratigraphic significance
The International Commission on Stratigraphy (ICS) has assigned the First Appearance Datum of Paradeshayesites oglanlensis as the defining biological marker for the start of the Aptian Stage of the Cretaceous, ~125.0 million years ago.