Allognathus

Allognathus
	Apertural view of the shell of Allognathus graellsianus
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia; clade Euthyneura; clade Panpulmonata; clade Eupulmonata; clade Stylommatophora; informal group Sigmurethra
Superfamily:	Helicoidea
Family:	Helicidae
Genus:	Allognathus; Pilsbry, 1888[1]

Allognathus is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Helicidae, the true snails. The genus is endemic to the Balearic Islands (Western Mediterranean) being present in all major islands and in several small islets.[2] The genus colonized the archipelago from the south-eastern Iberian Peninsula during the Middle Miocene, throughout a land-bridge connection. The different species belonging to Allognathus live in crevice rocks or under stones.

For some authors[3], Allognathus include two subgenus, Allognathus s. str., that is monospecific, and Iberellus Hesse 1908, that includes at least two species.

Species

Species within the genus Allognathus include:[2][3]

Allognathus campanyonii (Rossmässler, 1839)
Allognathus graellsianus (Pfeiffer, 1848) - type species
Allognathus hispanicus (Rossmässler, 1838)

References

Tryon G. W. & Pilsbry H. A. 1888. Manual of Conchology; structural and systematic. Second Series: Pulmonata, 4. Helicidae. Vol. II., 296 pp., Plates 1-69. Philadelphia.
Chueca, Luis J.; Madeira, María José; Gómez-Moliner, Benjamín J. (October 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.
Chueca, Luis J.; Forés, Maximino; Gómez-Moliner, Benjamín (2013). "Consideraciones nomenclaturales sobre las especies del género Allgonathus (Gastropoda: Pulmonata: Helicidae) y estudio anatómico de Allognathus hispanicus tanitianus". Iberus. 31: 63–74.

Bank, R. (2017). Classification of the Recent terrestrial Gastropoda of the World. Last update: July 16, 2017

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[1] Tryon G. W. & Pilsbry H. A. 1888. Manual of Conchology; structural and systematic. Second Series: Pulmonata, 4. Helicidae. Vol. II., 296 pp., Plates 1-69. Philadelphia.

[:0-2] Chueca, Luis J.; Madeira, María José; Gómez-Moliner, Benjamín J. (October 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.

[:1-3] Chueca, Luis J.; Forés, Maximino; Gómez-Moliner, Benjamín (2013). "Consideraciones nomenclaturales sobre las especies del género Allgonathus (Gastropoda: Pulmonata: Helicidae) y estudio anatómico de Allognathus hispanicus tanitianus". Iberus. 31: 63–74.