Menetus dilatatus
Menetus dilatatus is a species of small air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.
Shell description
The shell is small, of a yellowish green-color, minutely wrinkled by the lines of growth. The spire is flat,[1] composed of 2.5-3 whorls,[2] separated by a well-defined suture. The outer whorl has a sharp margin on a level with the spire, diminishing near, but still modifying, the aperture. Below this line the whorl is very convexly rounded so as to encircle a small, deep, abruptly formed umbilicus. This whorl rapidly enlarges, and terminates in a very large, not very oblique aperture, with the lip expanded so as to make it trumpet-shaped.[1]
The width of the shell is 2–3 mm.[2] The height of the shell is 0.9 mm.[2]
Distribution
The species is native to North America. The type locality is Nantucket island and Hingham, Massachusetts, USA.[1]
Its non-native distribution includes:
- Czech Republic - non-indigenous, in Bohemia around Elber river[3] and in Southern Bohemia[4][5]
- Germany
- Netherlands
- Poland
- Great Britain
Habitat
This snail lives in freshwater biotopes.
References
This article incorporates public domain text from the reference.[1]
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- ↑ a b c Glöer P. (2002). Die Süßwassergastropoden Nord- und Mitteleuropas. Die Tierwelt Deutschlands, ConchBooks, Hackenheim, 326 pp., Template:ISBN, page 190-194.
- ↑ Template:In lang Beran L. (1994). "Severoamerický okružák Menetus dilatatus (Gould) v České republice. The found of North American species Menetus dilatatus (Gould) in the Czech Republic (Mollusca: Gastropoda)". Práce muzea v Kolíně, řada přírodovědná 1: 31-32.
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External links
- Goodchild C. G. & Fried B. (1963). "Experimental Infection of the Planorbid Snail Menetus dilatatus buchanensis (Lea) with Spirorchis sp. (Trematoda)". The Journal of Parasitology 49(4): 588-592. JSTOR.
- http://spinner.cofc.edu/~fwgna/species/planorbidae/m_dilatatus.html