Head to head
Berry Cave Salamander vs Oklahoma Salamander
A Berry Cave salamander and an Oklahoma salamander both settled on the same unusual life strategy, keeping the gills of a larva for their entire adult lives, even though one lives in permanent cave darkness and the other in open, sunlit gravel-bed streams.
| Berry Cave Salamander | Oklahoma Salamander | |
|---|---|---|
| Scientific name | Gyrinophilus gulolineatus | Eurycea tynerensis |
| Habitat | Cave streams and pools | Surface spring-fed streams |
| Pigmentation | Reduced | Normal |
| Eyes | Reduced | Functional |
| Life stage retained | Gilled, aquatic (paedomorphic) | Gilled, aquatic (paedomorphic) |
| Range | A few caves in eastern Tennessee | Ozark Plateau spring streams |
| Genus | Gyrinophilus | Eurycea |
| Conservation status | Endangered | Least Concern |
Berry Cave Salamander vs Oklahoma Salamander: common questions
Why do both of these salamanders keep their gills as adults?
Both the Berry Cave salamander and the Oklahoma salamander are paedomorphic, meaning they retain larval features such as external gills into sexual maturity rather than metamorphosing into a lunged, terrestrial adult, a life history strategy suited to species that remain fully aquatic and gain little advantage from developing lungs.
Why does the Berry Cave salamander lack strong pigmentation and functional eyes while the Oklahoma salamander does not?
The Berry Cave salamander lives permanently within cave streams in total darkness, where reduced pigmentation and reduced eyes carry no real cost since there is no light to see by or camouflage to maintain, while the Oklahoma salamander lives in surface spring streams that still receive daylight, meaning normal pigmentation and functional eyesight remain genuinely useful.
Which of these two salamanders is more at risk?
The Berry Cave salamander is classified as Endangered, reflecting its extraordinarily narrow range within only a small number of Tennessee cave systems, while the Oklahoma salamander, though still range-limited to the Ozark Plateau, is classified as Least Concern, occupying a somewhat broader and less singularly vulnerable stretch of habitat.