The fraternal snail, also known as the San Nicolas Island snail, scientific name Micrarionta feralis, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helminthoglyptidae. This species is endemic to the United States, specifically California.
- Roth, B. 1996. Micrarionta feralis. 2006 IUCN Red List of Threatened Species. Downloaded on 7 August 2007.
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