Forsyth, R.G., M.J. Oldham, E. Snyder, F.W. Schueler & R. Layberry (2015). Forty years later: distribution of the introduced Heath Snail, Xerolenta obvia, in Ontario, Canada (Mollusca: Gastropoda: Hygromiidae). Check List11(4): 1711. doi: 10.15560/11.4.1711