|Researched by||Kelsey Lloyd||Refereed by||Admin|
|Other common names||Spear nut clam, Little nut clam||Synonyms||Nuculoma tenuis (Montagu, 1808), Nucula tenuis (Montagu, 1808)|
A bivalve with a thin, triangular shell up to 1.3 cm in length. Both valves are similar in size and shape but are slightly asymmetrical, with the beak positioned behind the mid-line. The inside of the shell is nacreous (iridescent). The outer surface of the shell is white to a bluey grey but can be covered with a yellow, greenish-yellow, or dark brown layer (periostracum). The outside of the shell bears fine radiating grooves (striations) with slightly bolder concentric lines.
Widespread around Britain and Ireland but absent from the English Channel, off the coast of south east England and western coasts of Ireland.
Ennucula tenuis is widely distributed in the northern hemisphere, from Greenland and Barents Sea, south to Gibraltar and the Florida Straits, and from the Alaskan Arctic and Siberia, south to California and Japan. It is also found in the Mediterranean.
Ennucula tenuis inhabits sandy mud, mud, and muddy gravel inshore in ca 10 m down to depths of around 200 m.
Ennucula tenuis is a sub-surface feeder that plays an important role in ecosystems, due to its bioturbation activity.
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De Kluijver, M.J., Ingalsuo, S.S. & de Bruyne, R.H., 2021. Mollusca of the North Sea. Marine Species Information Portal. Leiden, The Netherlands: ETI Bioinformatics. Available from: http://species-identification.org/species.php?species_group=mollusca&menuentry=inleiding
Oliver, P.G., Holmes, A.M., Killeen, I.J. & Turner, J.A., 2016. Marine Bivalve Shells of the British Isles. Amgueddfa Cymru - National Museum Wales. Available from: http://naturalhistory.museumwales.ac.uk/britishbivalves [Cited: 3 July 2018].
Tebble, N., 1976. British Bivalve Seashells. A Handbook for Identification, 2nd ed. Edinburgh: British Museum (Natural History), Her Majesty's Stationary Office.
Conchological Society of Great Britain & Ireland, 2018. Mollusc (marine) records for Great Britain and Ireland. Occurrence dataset: https://doi.org/10.15468/aurwcz accessed via GBIF.org on 2018-09-25.
NBN (National Biodiversity Network) Atlas. Available from: https://www.nbnatlas.org.
OBIS (Ocean Biodiversity Information System), 2022. Global map of species distribution using gridded data. Available from: Ocean Biogeographic Information System. www.iobis.org. Accessed: 2022-11-30
This review can be cited as:
Last Updated: 22/09/2021
Tags: Bivalve Mollusc Ennucula Nuculoma Nucula Smooth nutclam