The tag alias #60846 tyrannosaurus -> tyrannosaurus_rex has been approved.

Reason: Instead of aliasing to tyrannosaurus like at topic #1005, this is for the reverse. While not being functionally different, "cosmetically" people usually use and prefer the rex naming scheme more, especially in popular culture. The original reason still stands in that both of these tags mean the same thing, as there is only one known species in the Tyrannosaurus genus and that is the Tyrannosaurus Rex itself, so these tags should not be needlessly separated.

EDIT: The tag alias tyrannosaurus -> tyrannosaurus_rex (forum #4984) has been approved by @mlem.