It belongs to the "Marginiferae" section of the genus, which is characterized by side edges of the forehead that bend upwards into distinct lobes.

Additionally, the species is believed to be closely related to A. frontemarginatum, from which it can be separated by the structure of the head and the shape of the ischium of the seventh pereiopod of the male.

Its tergites are granulated, dark grey and decorated with small yellow spots at the attachment sites of the thoracic muscles.

The frontal shield surpasses the anterior edge of the head, bears a deep groove caudally and has rounded lateral angels.

The side edges of the forehead bend upwards into high, rounded lobes that don't reach the height of the frontal shield.