@article {246,
	title = {<i>Puperita tristis</i> (d{\textquoteright}Orbigny, 1842) (Gastropoda: Neritidae) is an ecotype of <i>Puperita pupa</i> (Linnaeus, 1767)},
	journal = {American Malacological Bulletin},
	volume = {16},
	year = {2001},
	pages = {13-20},
	author = {Minton, R.L. and Gunderson, R.W.}
}
