Largest Hisser Species...?

[ec0planet]

What is the largest hisser species, I have read different things on different sites. Some say that its the giant morph of G. Portentosa, others say the big black form, also the G oblongata is listed as the largest...Also do males or females tend to get larger...?

[Camden]

I'm not aware of any "giant morph" of portentosa. But the black form is generally the same size, oblongonota is the biggest as far as I know.

[MrCrackerpants]

Gromphadorhina oblongata