Thanks, that's helpful info! You're in range for the southern two-lined, brownback, and three-lined salamanders. The habitat looks more typical for a two-lined or brownback than a three-lined, but three-lined can be found in a pretty wide variety of habitats. To me, the adult you posted looks more like a brownback than a typical southern two-lined (many consider the brownback a subspecies or local population of southern two-lined). Some pictures of adult brownbacks show a relatively straight row of dots on the dorsum. So given all that, I'm gonna say that the larva you found is most likely a brownback salamander!