There are two exotic species in Australia in this genus: A. valentius and A. waterstoni, only distinguisable from each other by dissection or DNA.
https://en.wikipedia.org/wiki/Ambigolimax_waterstoni
https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.114535/Ambigolimax_valentianus
Ambigolimax sp. (valentius or waterstoni) is listed in the following regions:
Ambigolimax sp. (valentius or waterstoni) has been reported at the following locations: