clade Euthyneuraclade Panpulmonata clade Eupulmonata clade Stylommatophora Oreohelix (Radiocentrum) avalonense Hemphill, 1905 The Catalina mountain snail (Radiocentrum avalonense) is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Oreohelicidae.

This species is endemic to the United States, found only on Santa Catalina Island in the Channel Islands of California.

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