Orthalicus undatus is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Orthalicidae.
Subspecies Orthalicus undatus jamaicensis (Pilsbry, 1899) - synonym: Orthalicus jamaicensis. This is the only taxon of the genus Orthalicus that has been recorded in Jamaica.Gary Rosenberg, Igor V. Muratov 2006. Status Report on the Terrestrial Mollusca of Jamaica. Proceedings of the Academy of Natural Sciences of Philadelphia 2006 155 (1), 117-161,
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