In these groups the bone is thin and sensitive to vibration, so it is used for sensitive hearing. The thick stapes of Greererpeton is an indication that did not have good hearing like terrestrial animals. Greererpeton retains a postbranchial lamina on its shoulder blade, which may have been indicative of internal gills like those of fish.
In these groups, the bone is delicate and responsive to vibrations, making it well-suited for sensitive hearing. The stapes of Greererpeton was thicker than usual, implying that it lacked good auditory abilities comparable to those of land-dwelling animals. Greererpeton retained a postbranchial fin on its shoulder blade, which may have been an indication of internal gills similar to those found in fish.