Species Account

Idas argenteus Jeffreys, 1876

Mytiloidea : Mytilidae

Tebble name: n/a
Smith & Heppell name: Idasola argentea (Jeffreys, 1876)

To size: To 5mm. Shell Structure: Thin, fragile, hyaline. Equivalve: Equivalve. Equilateral: Inequilateral beaks at about 1\4 of shell length from anterior. Tumidity: A little compressed, umbos low. Outline: Oblong, submodioliform with anterior only a little more narrow than posterior; dorsal and ventral margins of about equal length, subparallel to each other; ventral margin long slightly curved, dorsal margin almost straight, anterior and posterior margins rounded. Contour: Prodissoconch I small, about 100μm in diameter, dimpled; Prodissoconch II large, about 600μm in diameter with concentric ridges only.

Sculpture: Smooth with a few growth lines. Margin: Inner margin smooth. Ligament: On a shallow resilifer behind the beaks extending about 1/2 the length of the posterior dorsal margin. Hinge: Hinge plate very narrow; about 10 simple crenulae in a group below the beaks; about 12 dyssodont teeth behind the ligament. Pallial Musculature: Indistinct. Periostracum: Thin with scattered short stubby hairs persistent mostly over posterior dorsal and anterior dorsal areas. Colour: White, semitransparent.

Distribution & Ecology

Found in sunken wood, at bathyal and abyssal depths.

Depth Range
Bathyal (500 - 2000m)
Abyssal Rise (2000 - 4000m)
Abyssal Plain (4000m +)

Additional Information & Related Species


Listed are literature citing Idas argenteus Jeffreys, 1876. Reference containing the species Type Description is highlighted.

Jeffreys J G 1876. New and peculiar Mollusca of the Pecten, Mytilus and Arca families, procured in the Valorous expedition. Annals and magazine of natural History. (4)18: 424-436.
Oliver PG & Holmes AM 2009. Idas lamellosus Verrill, 1881 (Bivalvia: Mytiloidea) a woodfall mussel new to the fauna of the northeast Atlantic. Journal of Conchology. 39 (6): 705-708.


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Record last modified: 22/03/2016