There is a narrow stripe of white scales along the posterior margin.

Its posterior margin is at the level of the upper third molars (M3s).

The posterior margin of the discal cell is marked by a dark line.

The apex is generally on the left side, but sometimes near the middle of the posterior margin.

The posterior margin lacks the heavy neck muscle attachment seen in that group.

The posterior margin of the carapace has three raised scales.

Has four raised scales at the posterior margin of the carapace.

Four raised scales on the posterior margin of the carapce.

There is a small brown spot in the postbasal area running to the posterior margin.

The posterior margins are almost parallel with the rounded outer one.