Species Account

Atopomya dolobrata Oliver, 2013

Galeommatoidea : Basterotiidae

Tebble name: n/a
Smith & Heppell name: n/a

To size: To 6mm. Shell Structure: Brittle, rather thin. Equivalve: Equivalve. Equilateral: Inequilateral, beaks well in front of midline. Tumidity: Compressed. Outline: Subovate somewhat wedge-shaped, anterior rounded and much narrower than obliquely truncate posterior; posterior dorsal margin long, almost straight; ventral margin long, almost straight. distinctly keeled along line from beak to posterior-ventral margin.

Sculpture: Surface dull, with commarginal lines and growth stops. Margin: Inner margin smooth. Ligament: External, set on a raised nymph. Hinge: Lacking teeth. Pallial Musculature: Scars weakly impressed, indistinct but adductor muscles subequal, pallial line entire. Periostracum: Thin, but persistent, minutely wrinkled and with a rust coloured deposit. Colour: Shell off-white, translucent.

Distribution & Ecology

Known from two lower bathyal locations in British waters, from close to the Wyville-Thomson Ridge and from the Porcupine Sea Bight. Along with the Norwegian record this suggests a wide distribution at bathyal depths along the Atlantic margin and at outer shelf depths in the colder Norwegian subarctic waters. The gills harbour symbiotic bacteria and Atopomya is presumed to be chemosymbiotic.

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

Additional Information & Related Species

Key Features & Similar Species

Can only be confused with Saxicavella jeffreysi but is distinctly wedge shaped with a distinct posterior angle.

Related Species

Galeommatoidea : Basterotiidae


Listed are literature citing Atopomya dolobrata Oliver, 2013. Reference containing the species Type Description is highlighted.

Oliver, P.G. 2013. Description of Atopomya dolobrata gen. et sp. nov.: First record of bacterial symbiosis in the Saxicavellinae (Bivalvia). . Journal of Conchology . 41(3): 359-367.


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Record last modified: 11/04/2016