Respuesta :
answer is D: Bathyurus Extans
it is in the Paleozoic Era, which is the 'Age of Ancient Life'. also the oldest fossil recorded in the Ordovician Period.
A) Jurrasic Period: 145 million yrs.
B) Permian Period: 299 milliion yrs.
C) Devonian Period: 358 million yrs.
D) Ordovician Period: 485 million yrs.