Endangered
Black Nerite
Theodoxus prevostianus
Black Nerite is a gastropod in the family Neritidae (order Cycloneritida) — Theodoxus prevostianus, recorded as Endangered and tied to Austria, Hungary, and United Kingdom.
The gastropod
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
Black Nerite is recorded from Austria, Hungary, United Kingdom, Romania, Croatia, and Algeria.
GBIF currently lists 296 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
Black Nerite is 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 Theodoxus prevostianus — often a short stub, Wikidata item Q998228 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.
