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Allognathus graellsianus

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Allognathus graellsianus
Apertural view of the shell of Allognathus graellsianus
Scientific classification
Kingdom:
Phylum:
Class:
(unranked):
clade Heterobranchia

clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora

informal group Sigmurethra
Superfamily:
Family:
Genus:
Species:
A. graellsianus
Binomial name
Allognathus graellsianus
(Pfeiffer, 1853)
Synonyms
  • Helix grateloupi Graells, 1846
  • Helix graellsiana Pfeiffer, 1848

Allognathus graellsianus is a species of land snail in the family Helicidae, the true snails. It is endemic to Mallorca, one of Spain's Balearic Islands.[1] This taxa is the type species of the genus Allognathus.

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

Description

A. graellsianus presents a thin globose shell. It has from 4 to 4 ½ whorls of fast growth, showing 5 bands well separated and usually discontinued. The aperture is oval-rounded with a reddish brown reflected peristome. The umbilicus is completely closed.[2]

Allognathus graellsianus Escorca (Mallorca). Scale bar 1 cm.

Distribution

The species is distributed along northwestern Tramuntana Mountains (western Mallorca), cohabiting in many localities with A. hispanicus.

References

  1. ^ a b c Gomez, B. 2013. Allognathus graellsianus. The IUCN Red List of Threatened Species. Version 2014.3. Downloaded on 17 April 2015.
  2. ^ 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.