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.

Anisus spirorbis
Five shells of Anisus spirorbis
NE[1]
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Hygrophila
Superfamily:
Planorboidea
Family:
Planorbidae
Subfamily:
Planorbinae
Tribe:
Planorbini
Genus:
Anisus
Subgenus:
Anisus
Species:
A. spirorbis
Binomial name
Anisus spirorbis
(Linnaeus, 1758)[2]

Taxonomy

Anisus spirorbis may be a broad-whorled morphotype of Anisus leucostoma.[3]

Distribution

Europe to Siberia.

This species occurs in countries that include:

Description

The shell is 1 to 1.5 mm high and measures 4 to 5.5 mm 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:

  • This species serves as first intermediate host for Prosthogonimus ovatus[8]
  • Dendritobilharzia loossi - Anisus spirorbis is an intermediate host.[7]
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References
  1. 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 27 June 2007.
  2. Linnaeus C. (1758). Systema Naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. 10th edition. - Vermes. Testacea: 700-781. Holmiae. (Salvius).
  3. http://www.conchsoc.org/aids_to_id/Anisus.php
  4. (in Czech) Horsák M., Juřičková L., Beran L., Čejka T. & Dvořák L. (2010). "Komentovaný seznam měkkýšů zjištěných ve volné přírodě České a Slovenské republiky. [Annotated list of mollusc species recorded outdoors in the Czech and Slovak Republics]". Malacologica Bohemoslovaca, Suppl. 1: 1-37. PDF.
  5. Red List of the molluscs (Mollusca) of the Czech Republic
  6. Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 106, ISBN 3-923376-02-2
  7. Akramova F. D., Azimov D. A. & Shakarboev E. B. (2011). "Morphology, biology and taxonomy of Dendritobilharzia loossi Skrjabin, 1924 (Trematoda: Bilharziellidae), a parasite of Pelecanus onocrotalus (Pelecanidae) and Anas plathyrinchos (Anatidae)". Parasite 18(1): 39-48. doi:10.1051/parasite/2011181039.
  8. Prosthogonimus ovatus (Parasite Species Summary) Archived 2011-07-23 at the Wayback Machine
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