Theodoxus fluviatilis

Taxobox
name = "Theodoxus fluviatilis"

---

status = NE
regnum = Animalia
phylum = Mollusca
classis = Gastropoda
subclassis = Orthogastropoda
ordo = Neritoida
superfamilia = Neritoidea
familia = Neritidae
genus = "Theodoxus"
species = "T. fluviatilis"
binomial = "Theodoxus fluviatilis"
binomial_authority = (Linnaeus, 1758) [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).]

"Theodoxus fluviatilis", the River nerite, is a small species of freshwater and brackish water snail with an operculum. It is an aquatic gastropod mollusk in the family Neritidae, the nerites.

Distribution

This species is found in Europe and North Africa.

Habitat

This small nerite is mostly found in calcium-rich, clean, fast-moving fresh water, but it can also tolerate low-salinity brackish water.

hell description

The shell is ovoid and only about 11 mm (less than half an inch) in maximum dimension. The shell surface is whitish with fine rather variable darker markings.

Distribution and conservation status

This species is found in Europe.

* Not listed in IUCN red list - not evaluated (NE) [2006 IUCN Red List of Threatened Species. . Cited 14 June 2007.]

* Czech Republic - extinct in Bohemia [ [http://mollusca.sav.sk/malacology/redlist.htm Red List of the molluscs (Mollusca) of the Czech Republic] ]
* Germany - high endangered ("Stark gefährdet") [Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 109, ISBN 3-923376-02-2]
* Netherlands [http://www.anemoon.org/anm/voorlopige-kaarten/kaarten-per-soort/zoetwatermollusken/wetenschappelijk/theodoxus-fluviatilis/, accessed 25 Septemeber 2008]
* Poland
* Slovakia [cite journal
journal = Biologia, Bratislava
pages = 561–562
title = First records of "Theodoxus fluviatilis" and "Sphaerium solidum" (Mollusca) from Slovakia
last = Čejka
first = Tomáš
coauthors = Michal Horsák
volume = 57
issue = 5
month =
year = 2002
doi =
url =
language = English
accessdate=]
* the British Isles
* ...

References

* Horst Janus, 1965, The young specialist looks at land and freshwater molluscs, Burke, London