Critically Endangered
Catalina mountain snail
Radiocentrum avalonense
Catalina mountain snail is a land snail in the family Oreohelicidae (order Stylommatophora) — Radiocentrum avalonense, recorded as Critically Endangered.
The land snail
These are the familiar land snails and slugs: air-breathing gastropods with a lung, not a gill.
Gastropods are snails and slugs. The animal is the soft body; the shell, when present, is grown, not worn like a stone.
Range and habitat
The Catalina mountain snail is a 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.
Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.
Diet
Snails move on a single foot and feed with a rasping tongue. Island and spring species rarely recolonise once the site is emptied.
In crisis
Catalina mountain snail is Critically Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.
Sources
Written for this catalog from the English Wikipedia article on Catalina mountain snail — often a short stub, Wikidata item Q3073104. Family and order context is original field-guide writing about the group, not a copied assessment of this one species. Wikipedia text is CC BY-SA. Not an IUCN assessment. Counts, when quoted, can change — confirm them on the recovery programme and on iucnredlist.org.
