Head to head
Comal Blind Salamander vs Austin Blind Salamander
A Comal blind salamander and an Austin blind salamander are both permanently aquatic, cave-adapted salamanders living entirely within Edwards Aquifer groundwater in central Texas, yet they occupy separate cave systems and were recognised by science on very different timelines.
| Comal Blind Salamander | Austin Blind Salamander | |
|---|---|---|
| Scientific name | Eurycea tridentifera | Eurycea waterlooensis |
| Range | Cibolo Sinkhole Plain, Comal/Bexar counties | Barton Springs complex, Austin only |
| Formal description | Long recognised | Not described until 2001 |
| Shares habitat with a sighted relative | No | Yes, the Barton Springs salamander |
| Eyes | Vestigial, non-functional | Vestigial, non-functional |
| External gills | Retained for life | Retained for life |
| Conservation status | Vulnerable | Endangered |
| Main threat | Groundwater pollution, aquifer depletion | Urban development, groundwater pollution |
Comal Blind Salamander vs Austin Blind Salamander: common questions
Do the Comal blind salamander and Austin blind salamander live in the same caves?
No, the Comal blind salamander is confined to caves and sinkholes within the Cibolo Sinkhole Plain of Comal and Bexar counties, while the Austin blind salamander lives only within the deep aquifer water beneath Austin's Barton Springs complex, meaning the two species occupy entirely separate stretches of the Edwards Aquifer system with no overlap.
Which of these two salamanders was discovered more recently?
The Austin blind salamander was only formally described as its own species in 2001, considerably more recently than the Comal blind salamander, which had already been long recognised by science, partly because the Austin species had to first be distinguished from the more visible Barton Springs salamander sharing its spring system.
Why is the Austin blind salamander more endangered than the Comal blind salamander?
The Austin blind salamander is confined to a single spring complex directly beneath a growing city, Austin, Texas, putting it at greater risk from urban development and groundwater pollution, while the Comal blind salamander, though still Vulnerable, occupies a somewhat less urbanised stretch of the aquifer.