Dynastes grantii. The significant protrusion forward of the bottom tooth at the base of the thoracic horn in males of Dynastes hyllus is also a distinguishing factor between the two species. While Dynastes hyllus can be distinguished morphologically from Dynastes grantii, geographic origin is generally the strongest factor in correct identification. A comparison between a male Dynastes grantii (left) and a male Dynastes hyllus (right) Additional images See also Dynastes tityus References External links Dynastinae Beetles of North America Beetles described in 1870