I'm going to need a bit more than that, lots of freshwater crabs, no marine amphibians...
Taylor's salamander is odd http://en.wikipedia.org/wiki/Taylor's_salamander but obviously derived from a freshwater salamander.
I think this is quite telling, http://www.bio.net/bionet/mm/deepsea/2001-August/000500.html evidently what we call amphibians are not exactly what ancient amphibians were.
http://en.wikipedia.org/wiki/Taylor's_salamander
I can't seem to get the link to Taylor's salamander to work right, cut and past the entire thing if anyone is interested...