Appearance
It is up to 60 to 70 mm (2.4 to 2.8 in) across, with an oval shaped carapace. The species epithet octodentatus refers to four pairs of teeth (including the orbital angle) on the sides of the carapace, although the fourth is very small. Some references list one tooth only. Color varies with the carapace described as grey and yellow, mottled green and brown, purple and yellow. It can produce sound by stridulation.