Species Account

Dacrydium vitreum (Holboll in Moller, 1842)

Mytiloidea : Mytilidae

Tebble name: n/a
Smith & Heppell name: Dacrydium vitreum (Holboll in Moller, 1842)

To size: Very small to 5mm. Shell Structure: Fragile, hyaline. Equivalve: Equivalve. Equilateral: Inequilateral beaks close to anterior margin. Tumidity: Compressed. Outline: Outline modioliform, beaks subterminal; ventral margin long more or less straight; dorsal margins almost straight, anterior dorsal very short, anterior narrowly rounded not pronounced, posterior dorsal long sloping gently relative to ventral margin; posterior and posterior ventral margins forming a smooth broad curve. Contour: Prodissoconch small about 140μm in diameter.

Sculpture: Sculpture smooth except for scattered weak growth lines. Margin: Inner margin smooth. Ligament: Ligament small, internal, situated in a distinct sunken resilifer beneath the beaks. Hinge: Hinge plate narrow, ligament margin with up to 70 dysodont teeth, these as narrow, rather irregular flanges decreasing in size towards the beaks; a few more robust denticulate teeth are also present anterior of the beaks. Pallial Musculature: Anterior adductor scar about 1/2 size of posterior. Periostracum: Thin, greenish, semitransparent. Colour: White, glassy.

Distribution & Ecology

An arctic species that has been recorded very rarely from deep water to the north of the Faroes and Iceland. Salas & Gofas (1997) do not give any boreal records for this species and most have been confused with D. ockelmanni.

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

Additional Information & Related Species


Listed are literature citing Dacrydium vitreum (Holboll in Moller, 1842). Reference containing the species Type Description is highlighted.

Møller H O 1842. Index Molluscorum Groenlandiae. Naturhistorisk Tidsskrift, Kjøbenhavn. 4(1): 76-97.
Warén A 1991. New and little known Mollusca from Iceland and Scandinavia. Sarsia. 76: 53-124.


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Record last modified: 22/03/2016