Extremely small range in central Texas north of Austin; found only in natural springs in Williamson County.
Strictly aquatic species that hides among the debris at the bottom of spring-fed bodies of water, sometimes within caves. They are most often found within a few meters of the spring's origin.
Neotenic species that remains in juvenile aquatic form. They only reach 2-3 inches in total length and have a translucent ventrum. Their dorsal surfaces are usually some shade of grey, brown, or olive with light speckling. They have 3 external gills on each side, and a broad short snout. Most have a light stripe down the top of the tail. They have 14-16 costal grooves. A dark stripe runs from the corner of each eye to the nasal opening.
Learn more with Schechter Natural History's Guide to Reptiles and Amphibians