However , there is no evidence that these cave streams are currently interconnected .
It has only been found in six cave streams , all lie within a 10 - mile radius circle around Waterloo , Illinois , making this a very localized species .
There is no evidence that these cave streams are currently interconnected .
It has only been found in six cave streams , all lie within a 10 - mile radius circle around Waterloo , Illinois , making this a very localized species .