User blog comment:Styracosaurus Rider/Ha!/@comment-203.96.0.166-20101124075355/@comment-3148529-20101124155616

That's the thing---as of 2000, "a name that was considered valid for 50 years can't be replaced now by one that's been considered invalid during that time." The link explains exactly how we avoided that subject (in summary, T-rex was too cool to change).