Cryptomastix mullani, commonly known as the Coeur d'Alene Oregonian snail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Polygyridae.
Subspecies Cryptomastix mullani blandi (Hemphill, 1892) Cryptomastix mullani clappi (Hemphill, 1897) Cryptomastix mullani hemphilli (W. G. Binney, 1886) Cryptomastix mullani latilabris (Pilsbry, 1940) Cryptomastix mullani olneyae (Pilsbry, 1891) Cryptomastix mullani tuckeri (Pilsbry and Henderson, 1930)
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