Discussion

A. morelandi can be separated from A. garricki since its cephalothorax possesses lateral lobes which are lacking in the latter. A. morelandi lacks the well developed page 23neck round in A. quadratus and also has the posterior lateral lobe of the cephalothorax less well developed.

A. morelandi most closely resembles A. percis but can be distinguished from it by the anterior lobe of the cephalothorax which projects laterally, not posterolaterally as in A. percis, and by the posterior margin of the fourth thoracic segment plate which is not as strongly curved as in A. percis and has more clearly defined posterolateral angles.