Georgetown salamanders are small, permanently aquatic salamanders. Adults are typically 5 to 7.5 cm in length and less than 0.5 cm in diameter. Although their coloration varies, most adults are dark brown, dark olive, or gray. Juveniles tend to be darker in color. Coloration is confined to the dorsal and lateral sides of the body; the ventral surface is usually translucent. Many individuals have a light, cream- or yellow-colored stripe on the top of the tail.
The head is roughly shovel shaped, broad but relatively short and widest at the point where the upper and lower jaws meet. Three prominent external gills—often deep red in color—extend from each side of the head. The eyes are relatively large and have a gold-colored iris. Black melanophores are concentrated around each eye, forming a black circle around the eye and a black line that runs from the corner of the eye to the nasal opening. There are 14-16 costal grooves, counting those in the forelimb and hindlimb regions. Chippindale et al. (2000) described the osteology of the species and how it differs from that of E. tonkawae and E. chisholmensis.
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