DistributionRead full entry
Range DescriptionThis species is found in high quality streams on four Hawaiian islands. It was historically on all the islands of Kaui, Maui, Molokai, Hawaii and Oahu, restricted to high-quality streams (Hawaii Biological Survey 2010). It is likely now to be present in around six to ten locations, based on known stream occurrences (see population section), and is only confirmed from four of the Hawaiian islands, Maui, Hawaii, Kaui, and Oahu (Hodges 1992, Hodges and Allendorf 1998, Fitzsimons et al. 2005, Hau 2007, Hawaii Watershed Atlas 2008, Kido 2008, Hawaii Biological Survey 2010). Its estimated extent of occurrence is less than 20,000 km2.