Board Thread:Wiki Discussion/@comment-26923065-20150912121011/@comment-1259419-20151217205150

You should not read to much into it. We also know Megalodon by the species name, rather than its genus. At the university, we call most model organisms by its genus name. Except for i.e. C. elegans; I really wouldn't know the name of that genus. These kind of deviations from the genus-name-only tradition are not limited to Tyrannosaurus rex. I am not nearly enough a consistancy-fetishist to be bothered by it.