Species Account

Lyonsiella abyssicola G O Sars, 1872

Verticordioidea : Verticordiidae

Tebble name: n/a
Smith & Heppell name: Lyonsiella abyssicola (G O Sars, 1872)

To size: To 6 mm. Shell Structure: Thin, fragile, translucent. Equivalve: Slightly inequivalve, RV a little larger. Equilateral: Strongly inequilateral, beaks close the the anterior margin. Tumidity: Inflated. Outline: Trapezoidal, sub-modioliform, anterior reduced, rounded; posterior dorsal margin long, straight, at right angle to truncate posterior margin; ventral margin long, straight. Contour: Umbos very prominent; umbo-posterior ventral ridge roundly angulate.

Sculpture: Of radial lines increasing in number with size and overall with dense rows of minute spines; frequently with adhering sediment particles. Margin: Inner margin smooth. Ligament: Small on a lithodesma set just behind the beaks. Hinge: Without teeth. Pallial Musculature: Obscure. Periostracum: Thin. Colour: Dirty white.

Distribution & Ecology

A deep water species, living at shelf depths in the Arctic but submerging further south; typically bathyal along the entire Atlantic margin.

Depth Range
Continental Margin Zone (200 - 500m)
Bathyal (500 - 2000m)

Additional Information & Related Species


Listed are literature citing Lyonsiella abyssicola G O Sars, 1872. Reference containing the species Type Description is highlighted.

Olabarria C. 2005. Patterns of bathymetric zonation of bivalves in the Porcupine Sea Bight and adjacent abyssal plain, NE Atlantic. Deep-Sea Research I. 52: 15-31.
Sars G O 1878. Bidrag til kundskaben om Norges arktiske fauna: 1. Mollusca regionis Arcticae Norvegiae. Oversigt over de i Norges arktiske region forekommende bloddyr A W Brogger, Christiana. 466pp, 34pls.


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Record last modified: 22/03/2016