Critically Endangered
Thickshell pondsnail
Stagnicola utahensis
Thickshell pondsnail, also called Utah Ribbed Snail, is a gastropod in the family Lymnaeidae — Stagnicola utahensis, recorded as Critically Endangered and tied to United States.
Appearance
The shell is globose, somewhat umbilicated and irregularly costate. The color of the shell is light horn and nearly pellucid. The shell has from 4 to 4 and half convex whorls, that are somewhat flattened above, giving rather a shouldered appearance to the whorls.
The average width of the shell of Ladislavella utahensis is 7.10 mm. The average height of the shell is 13.40 mm.
Range and habitat
This species is endemic to Utah and it is known only from Utah Lake. The type locality is Lake Utah, Lehi, Utah. The species was already considered "rare" in Utah Lake in the 1880s.
GBIF currently lists 45 occurrence points. Those points follow where people logged the taxon — museum drawers and surveys included — not a closed range boundary.
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
Thickshell pondsnail 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 Thickshell pondsnail, Wikidata item Q3074461 and GBIF occurrence geography. 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.
