Eoscatophagus

Eoscatophagus is an extinct genus of marine ray-finned fish, in the family Scatophagidae, known from the Eocene. It contains a single species, E. frontalis, known from the Monte Bolca site of Italy.
It is the earliest scatophagid known from the fossil record. It was originally erroneously identified by Volta as a specimen of the spotted scat itself, before being described as its own species within Scatophagus by Agassiz. It was moved to its own genus, Eoscatophagus, in 1999.
As the earliest known member of the Scatophagidae, it is often used for calibrating phylogenies of marine fish evolution.