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Wikipedia / Anisus spirorbis

Anisus spirorbis is a species of small freshwater air-breathing snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.

Taxonomy

Anisus spirorbis may be a broad-whorled morphotype of Anisus leucostoma.

Distribution

Europe to Siberia.

This species occurs in countries that include:

Description

The shell is 1 to 1.5mm high and measures 4 to 5.5mm in diameter. It has approximately 4.5 whorls. The mouth is oblique to the axis of the coil. The whorls are increase relatively rapidly (in relation to other Anisus species). The shell is yellowish horn coloured and bears thin growth strips. The body of the animal is grey-brownish black with lighter colored tentacles.

Ecology

Parasites:

References

  • Deshayes G.P., 1839-1851 Histoire naturelle générale et particulière des mollusques terrestres et fluviatiles tant des espèces que l'on trouve aujourd'hui vivantes, que des dépouilles fossiles de celles qui n'existent plus; classés par les caractères essentiels que présentent ces animaux et leurs coquilles, vol. I, p.402 pp

  • Studer, S. (1820). Kurzes Verzeichnis der bis jetzt in unserm Vaterlande entdeckten Conchylien. Naturwissenschaftlicher Anzeiger der Allgemeinen Schweizerischen Gesellschaft für die Gesammten Naturwissenschaften, 3 (11): 83–90; (12): 91–94. Bern

  • Glöer P. & Pešić V. (2012) The freshwater snails (Gastropoda) of Iran, with descriptions of two new genera and eight new species. ZooKeys 219: 11–61