Anisus septemgyratus explained

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

Taxonomy

Glöer (2002)^[1] considered Anisus septemgyratus (Rossmässler, 1835) as a junior synonym of Anisus leucostoma (Millet, 1813). Later Glöer & Meier-Brook (2008)^[2] used name Anisus septemgyratus again.

Horsák et al. (2013)^[3] consider Anisus calculiformis (Sandberger, 1874) as a synonym of Anisus septemgyratus.

Distribution

This species occurs in countries and islands including:

• Czech Republic^{[4] [3]} – in Moravia, critically endangered (CR)^[5]
• Slovakia^{[4] [3]}
• Poland
• British Isles

Description

The number of prostate diverticles ranges from 30 to more than 50.^[2]

External links

• Anisus septemgyratus at Animalbase

Notes and References

1. Glöer P. (2002). Die Süßwassergastropoden Nord- und Mitteleuropas. Die Tierwelt Deutschlands, ConchBooks, Hackenheim, 326 pp.,, page 254-263.
2. Glöer P. & Meier-Brook C. (2008). "Redescription of Anisus septemgyratus (Rossmässler, 1835) and Anisus leucostoma (Millet, 1813) (Gastropoda: Planorbidae)". Mollusca 26(1): 89–94.
3. Horsák M., Juřičková L. & Picka J. (2013). Měkkýši České a Slovenské republiky. Molluscs of the Czech and Slovak Republics. Kabourek, Zlín, 264 pp.
4. 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. http://mollusca.sav.sk/malacology/redlist.htm Red List of the molluscs (Mollusca) of the Czech Republic