Ecrobia truncata

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Ecrobia truncata
Ecrobia truncata (YPM IZ 033794).jpeg
Ecrobia truncata
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Family: Hydrobiidae
Genus: Ecrobia
Species:
E. truncata
Binomial name
Ecrobia truncata
(Vanatta, 1924)
Synonyms [1]
  • Hydrobia minuta(Totten, 1834) (preoccupied name)
  • Hydrobia totteniMorrison, 1954
  • Hydrobia truncata(Vanatta, 1924)

Ecrobia truncata, common name the truncated marsh hydrobia or minute hydrobia, is a species of very small aquatic snail, an operculate gastropod mollusk in the family Hydrobiidae. [1]

Contents

Distribution

This species can be found along the coasts of Virginia, Massachusetts and Canada, the Northwest Atlantic Ocean and along the coasts of the British Isles and Scandinavia and in the Mediterranean Sea.

Description

The maximum recorded shell length is 5.8 mm. [2] The small shell is elongate to ovate. Its color varies between pale brown and grayish with a glassy shine. The round whorls are smooth with deep sutures. The apex is in many cases eroded. The ovate aperture is characterized by a marked lip edge.

The dark brown to almost black head shows white spots on the tentacles and on the neck and a black spot in front of each eye.

Habitat

Minimum recorded depth is 0 m. [2] Maximum recorded depth is 3.7 m. [2] The minute hydrobia can be found on seaweeds and mud close to the banks of brackish marshes and estuaries.

Biology

The minute hydrobia is a secondary host of a parasitic fluke, Homalometron pallidum . This has a complex life cycle with the adult phase being found in a small fish, the mummichog, Fundulus heteroclitus. [3]

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References

  1. 1 2 Ecrobia truncata (Vanatta, 1924) . Rosenberg, G. (2010). Ecrobia truncata (Vanatta, 1924). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=159879 on 15 June 2011 .
  2. 1 2 3 Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. doi : 10.1371/journal.pone.0008776.
  3. Stunkard, Horace W. (1964). "The morphology, life history and systematics of the digenetic trematode Homalometron pallidum Stafford 1904" (PDF). The Biological Bulletin. 126 (1): 163–173. doi:10.2307/1539426. JSTOR   1539426.

Further reading