Beautiful animal-- it's too bad you don't have a female. This is the "long-horn" form of "werneri" that was being advertised as "rhino" werneri at some point, and that came in one of the F1 shipments a while back. I suspect this is a case of a less known taxon that will eventually lead to its upgrade to subspecies, or even full species. The other alternative is that it is a member of a completely isolated population of werneri, and that it's changed due to that isolation over time, but not enough to warrant a taxonomic upgrade, but I find this less likely.