is endemic to North America according to the fossil record. It is found in southernmost Canada, and most of the United States east of the Rockies. West of the Rockies, it is known from California and Nevada (Mackie, 2007). Only two occurrences for British Columbia are known – a 1969 record from the Kootenays, and a 2013 record from Salt Spring Island.
This species is found in ponds, swamps, small lakes, and slow-moving streams. It has a preference for muddy bottoms (Herrington, 1962).
Note Author: Ian Gardiner