Carychium tridentatum

Carychium tridentatum
	Apertural view of shell
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Ellobiida
Superfamily:	Ellobioidea
Family:	Ellobiidae
Subfamily:	Carychiinae
Genus:	Carychium
Species:	C. tridentatum
Binomial name
	Carychium tridentatum; (Risso, 1826)

Carychium tridentatum is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Ellobiidae.

Description[]

The shell is 1.8-2.3 mm high x 0.8-0.9mm. wide. The shell is more slender than that of Carychium minimum. If the last whorl above the aperture is opened this shows the parietalis (a spiral ridge on the parietal region projecting into the interior of the shell) descending in a characteristic double curve (see figure below).

Drawing of shells of Carychium tridentatum that have been broken open to show the internal structure.

Distribution[]

This species occurs in European countries and islands the Mediterranean, the Caucasus region and North Africa. It is recorded from Siberia as Carychium striolatum J.R. Bourguignat, 1857 (synonym)^[2]

The European countries include:

Belgium
Bulgaria
Czech Republic
Netherlands
Poland
Slovakia
Great Britain
Ireland
Ukraine^[3]

Albania, Andorra, Austria, Azores, Belarus, Bulgaria, Channel Islands , Croatia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Italy, Kaliningrad, Latvia, Liechtenstein, Lithuania, Luxembourg, Madeira, Moldova, Montenegro, Norway, Romania, Serbia, Slovenia, Spain, Sweden, Switzerland.^[4]

It has been introduced to North America, including to:

British Columbia, Canada^[5]

References[]

^ Risso, A. 1826: Histoire naturelle des principales productions de l'Europe méridionale et particulièrement de celles des environs de Nice et des Alpes Maritimes. Tome quatrième. - pp. [1-3], j-vij [= 1-7], 1-439, pl. [1-12]. Paris. (Levrault).
^ Worldwide Mollusc Species Database
^ Balashov I. & Gural-Sverlova N. 2012. An annotated checklist of the terrestrial molluscs of Ukraine. Journal of Conchology. 41 (1): 91-109.
^ Welter-Schultes, F. W. 2012. European non-marine molluscs, a guide for species identification. Bestimmungsbuch für europäische Land- und Süsswassermollusken. Planet Poster Editions, Göttingen. ISBN 978-3-933922-75-5
^ Forsyth, R.G. & Williston, P. 2012. Terrestrial snails from an urban park in Vancouver, British Columbia. The Festivus 44(7):77-80. [1]

External links[]

Carychium tridentatum at Animalbase
MolluscIreland

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[1] Risso, A. 1826: Histoire naturelle des principales productions de l'Europe méridionale et particulièrement de celles des environs de Nice et des Alpes Maritimes. Tome quatrième. - pp. [1-3], j-vij [= 1-7], 1-439, pl. [1-12]. Paris. (Levrault).

[2] Worldwide Mollusc Species Database

[Balashov-3] Balashov I. & Gural-Sverlova N. 2012. An annotated checklist of the terrestrial molluscs of Ukraine. Journal of Conchology. 41 (1): 91-109.

[4] Welter-Schultes, F. W. 2012. European non-marine molluscs, a guide for species identification. Bestimmungsbuch für europäische Land- und Süsswassermollusken. Planet Poster Editions, Göttingen. ISBN 978-3-933922-75-5

[Forsyth2012-5] Forsyth, R.G. & Williston, P. 2012. Terrestrial snails from an urban park in Vancouver, British Columbia. The Festivus 44(7):77-80. [1]

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