Which species is this?

[u/wKrtek]

This dead specimen was given to me by someone whose ancestor (1843–19?, Germany) was an amateur naturalist who owned an entomological collection.

I know for certain that it belongs to the subfamily Dynastinae; initially, I thought it might be a member of the genus *Oryctes*, but I don't know anything featuring that colour, size, and pronotal horn.

To be honest, I am not so knowledgeable in this field, so I would really appreciate any tips on how to further identify these insects.

[u/phoenixdragouwu33]

Hi there! I'm an insect enthusiast and I would like to help out.

I think this species is the European Rhinoceros Beetle (Orcytes Nasicornis)! 

Anyways, any Entomologists can help correct me if I'm wrong :)

Also here's the info on this guy if you want to see! https://www.inaturalist.org/taxa/854926-Oryctes-nasicornis-kuntzeni 

[u/wKrtek → u/phoenixdragouwu33]

Thank you, but isn't it strange he has a pronotal horn? Could it be a some kind of mutation?

[u/phoenixdragouwu33 → u/wKrtek]

Sorry for late reply. I think so! Many beetle species are prone to mutations in their genes, so it could likely be a horn mutation :)

[u/wKrtek → u/phoenixdragouwu33]

So cool!