Flat pit snail

Flat pit snail
	Flat pit snail ( Lacuna pallidula )
Systematics
Subordination :	Hypsogastropoda
Superfamily :	Littorinoidea
Family :	Littorinidae
Subfamily :	Pit snail (Lacuninae)
Genre :	Lacuna
Type :	Flat pit snail
Scientific name
	Lacuna pallidula
	( EM da Costa , 1778)

The flat pit snail ( Lacuna pallidula ) from the subfamily of pit snails (order Sorbeoconcha ) lives on seaweed on particularly protected coasts.

features

The flat pit snail has a yellowish-green to almost white shell of spherical shape with three to four rapidly expanding coils and a wide, ear-shaped mouth and a very large and clear navel . The muzzle is almost the same height as the entire case and the last turn shows no color banding.

Like all representatives of the Littorinidae, Lacuna pallidula is separate sexes and is particularly noticeable because of the difference in size between the two sexes. The housing of the much larger females measure 12 × 6 mm, the males just 6 × 3 mm.

Distribution and way of life

Lacuna pallidula lives in seaweed-covered coastal areas up to a maximum depth of 70 m. It prefers the brown alga Fucus serratus as a habitat and source of food, but off the Irish coast it can also be found on the red alga Mastocarpus stellatus. The snails feed on the algae on which they live.

The distribution area extends in the eastern North Atlantic from northern Norway over the British Isles to the Atlantic coast of France and reaches the western Baltic Sea via the North Sea, Skagerrak and Kattegat .

Web links

Commons : Flat pit snail ( Lacuna pallidula ) - Collection of images, videos, and audio files

Individual evidence

^ TCH Cole: Dictionary of animal names: Latin-German-English, German-Latin-English. 2nd edition, 974 pp., Springer Verlag, 2015. ISBN 978-3-662-44241-8 (reading sample)

↑ ^a ^b ^c ^d ^e ^f P. J. Hayward & JS Ryland (eds.): Handbook of the Marine Fauna of North-West Europe. Second Edition, 880 pages, Oxford University Press, 2017. (excerpt)

^ ^A ^b G. J. Vermeij: Time of Origin and Biogeographical History of Specialized Relationships between Northern Marine Plants and Herbivorous Molluscs. In: Evolution , Vol. 46, No. 3, pp. 657–664, 1992 (digitized version )

[Cole,_2015-1] TCH Cole: Dictionary of animal names: Latin-German-English, German-Latin-English. 2nd edition, 974 pp., Springer Verlag, 2015. ISBN 978-3-662-44241-8 (reading sample)

[Hayward_&_Ryland,_2017-2] ↑ ^a ^b ^c ^d ^e ^f P. J. Hayward & JS Ryland (eds.): Handbook of the Marine Fauna of North-West Europe. Second Edition, 880 pages, Oxford University Press, 2017. (excerpt)