They are often confused with "Pheidole" or "Pheidologeton". These two have major and minor workers, while "Aphaenogaster" has only a single worker caste. "Pheidole" has a 3-segmented club on its antenna. But "Aphaenogaster" has four segments and a larger body size. "Pheidologeton" has a 11-segmented antenna, while the antenna in "Aphaenogaster" is 12-segmented.