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Allognathus hispanicus
	Aperture view of the shell of Allognathus hispanicus
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Helicidae
Genus:	Allognathus
Species:	A. hispanicus
Binomial name
	Allognathus hispanicus; (Rossmässler, 1838)
Synonyms
	Helix hispanica Rossmässler, 1838; Helix balearica Rossmässler, 1838 (in syn.); Iberellus balearicus Rossmässler, 1838;

Allognathus hispanicus (now known as Allognathus balearicus) is a species of land snail in the family Helicidae, the true snails. This species is endemic to Mallorca, one of Spain's Balearic Islands.^[1] The common name is "caragol de Serp" (snake snail), due to the pattern of its shell.

The snail lives in cracks in rocks and walls, and is only active when it rains.^[1]

Description

Globose-flatenned shell with 4 ½ whorls with a clear suture and thin and irregular striation. The last whorl 3 times larger than the penultimate, growing progressively to the aperture. The aperture is oblique-oval descending from the third to the fourth whorl. Soft peristome with a brownish inner lip slightly reflected. Umbilicus is completely closed.^[2]

Distribution

The species is distributed along the northern Tramuntana Mountains in western Mallorca, cohabiting in many localities with A. graellsianus.^[2]^[3]

References

^ ^a ^b ^c Gómez Moliner, B.J. 2011. Allognathus hispanicus. The IUCN Red List of Threatened Species 2011: e.T156607A4971951. https://doi.org/10.2305/IUCN.UK.2011-1.RLTS.T156607A4971951.en. Downloaded on 9 April 2019.
^ ^a ^b Chueca, Luis J.; Forés, Maximino; Gómez-Moliner, Benjamín J. (2013). "Consideraciones nomenclaturales sobre las especies del género Allognathus (Gastropoda: Pulmonata: Helicidae) y estudio anatómico de Allognathus hispanicus tanitianus". Iberus. 31: 63–74.
^ Chueca, Luis J.; Madeira, María José; Gómez‐Moliner, Benjamín J. (2015). "Biogeography of the land snail genus Allognathus (Helicidae): middle Miocene colonization of the Balearic Islands". Journal of Biogeography. 42 (10): 1845–1857. doi:10.1111/jbi.12549. ISSN 1365-2699.