sentences:  All ten known species in this genus inhabit mountain ecosystems in North America, and all but three are found primarily in the mountains of the west coast of the United States, Baja California and British Columbia.Of the three non-western species, the Sacramento Mountain salamander ("A. hardii") is endemic to a mountainous region in New Mexico, while the two currently-described "Castaneides" species are endemic to the Appalachian Mountains of eastern United States.Ten species in two subgenera are currently assigned to this genus