What is the most updated info on Megalodon's ancestors?

[jikohr]

Hi everyone!

 

I've been reading a bit about Megalodon's ancestors and trying to update my knowledge and I'm coming across some conflicting information. It seems everywhere I look has a different age range and there seems to be a debate between the genus. Some use Carcharocles and some use Otodus.

I've been using Carcharocles for the lineage, is that officially out of date?

Also what are the age ranges of the ancestors Auriculatus, Angustidens, and Chubutensis?

I can't find any consistent numbers and some places seem to suggest they coexisted (Auriculatus with Angustidens for a short time then later Angustidens with Chubutensis etc.) is that true?

 

Any insight is appreciated as always!

 

[Troodon]

From @Boesse  and he can address the genus name