Pyramidula umbilicata

Pyramidula umbilicata
	Six shells of Pyramidula umbilicata, scale bar in mm
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia clade Euthyneura; clade Panpulmonata; clade Eupulmonata; clade Stylommatophora; informal group Orthurethra
Superfamily:	Pupilloidea
Family:	Pyramidulidae
Genus:	Pyramidula
Species:	P. umbilicata
Binomial name
	Pyramidula umbilicata; (Montagu, 1803)[1]
Synonyms
	Bulla umbilicata Montagu, 1803

Pyramidula umbilicata is a species of very small air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusc in the family Pyramidulidae.

Shell description

The width of the shell is up to 2.9 mm, the height is up to 1.7 mm.[2] The shell is low conical (much broader than high) and tightly coiled and has very fine growth lines. The colour is red brown becoming more grey with age. The umbilicus is c. 1/3 of the shell diameter.

Distribution

This species has a Lusitanian-Atlantic distribution.[3]

Great Britain[4]
Ireland[4]
France - in Pyrenees[3]
Spain[3]
Portugal[3]

References

Montagu G. (1803). Testacea Britannica, or natural history of British shells. pp. I-XXXVIII [= 1-38], 1-606, [1-4], pl. 1-16. London.
Gittenberger E. & Bank R. A. (1996). "A new start in Pyramidula (Gastropoda Pulmonata: Pyramidulidae)". Basteria 60: 71-78.
Alberto Martínez-Ortí, Benjamín J. Gómez-Moliner & Carlos E. Prieto. (2007). "El género Pyramidula Fitzinger 1833 (Gastropoda, Pulmonata) en la Península Ibérica. The genus Pyramidula Fitzinger 1833 (Gastropoda, Pulmonata) in the Iberian Peninsula". Iberus, Sociedad Española de Malacología, 25(1): 77-87.
Falkner G., Obrdlík P., Castella E. & Speight M. C. D. (2001). Shelled Gastropoda of Western Europe. München: Friedrich-Held-Gesellschaft, 267 pp.

External links

Pyramidula umbilicata at Animalbase taxonomy,short description, distribution, biology,status (threats), images

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[1] Montagu G. (1803). Testacea Britannica, or natural history of British shells. pp. I-XXXVIII [= 1-38], 1-606, [1-4], pl. 1-16. London.

[Gittenberger-2] Gittenberger E. & Bank R. A. (1996). "A new start in Pyramidula (Gastropoda Pulmonata: Pyramidulidae)". Basteria 60: 71-78.

[Martínez-Ortí-3] Alberto Martínez-Ortí, Benjamín J. Gómez-Moliner & Carlos E. Prieto. (2007). "El género Pyramidula Fitzinger 1833 (Gastropoda, Pulmonata) en la Península Ibérica. The genus Pyramidula Fitzinger 1833 (Gastropoda, Pulmonata) in the Iberian Peninsula". Iberus, Sociedad Española de Malacología, 25(1): 77-87.

[Falkner-4] Falkner G., Obrdlík P., Castella E. & Speight M. C. D. (2001). Shelled Gastropoda of Western Europe. München: Friedrich-Held-Gesellschaft, 267 pp.