Allognathus campanyonii

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Allognathus campanyonii is a land snail in the true snail family Helicidae. It is listed as Near Threatened and is native to the Balearic Islands in the western Mediterranean. Some populations were introduced to parts of the Iberian Peninsula (Banyuls-sur-Mer, Barcelona, Sitges, Tarragona), but today only the population on Tarragona city walls remains.

The species shows a clear geographic pattern with five subspecies, each with its own area. In Mallorca there are two forms: the main one, A. c. campanyonii campanyonii, which lives in the lower parts of Mallorca and in the Cabrera archipelago; and a second form found in the southern Tramuntana Mountains. In Ibiza (the Pityusic Islands) there are two subspecies: A. c. tanitianus, on Ibiza and Formentera, and A. c. pythiusensis, on Ses Bledes and some Ibiza populations. In Menorca there is A. c. minoricensis, which shows two main phylogroups.