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Image of Asperarca nodulosa (O. F. Müller 1776)
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Asperarca nodulosa (O. F. Müller 1776)

Biology

provided by World Register of Marine Species
Type of larval development: not documented [inferred from prodissoconch morphology to be short planktonic, non-planktotrophic]
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copyright
WoRMS Editorial Board
contributor
Gofas, Serge [email]

Diagnosis

provided by World Register of Marine Species
Shell elongate, up to 15 mm, relatively compressed, strongly inequilateral and narrowing anteriorly. An obtuse keel running from the umbo to the posteroventral end. Exterior with radial ribs and with dense commarginal cords, sometimes confluent with each other, the ribs forming elongated tubercles where they overrun the commarginal cords. Colour generally reddish brown, also inside, sometimes paler or faded to greyish tones on old specimens, even live-taken. Acar clathrata (Defrance, 1816) = A. pulchella (Reeve, 1843), a species of the Mediterranean circalittoral, differs by its white color and the external sculpture with strong radial ribs and commarginal lamellae forming scales as theu overrun the ribs. The ribs increase in size from the anterior part to the keel, then they are smaller and divergent (not radial) behind the keel.
license
cc-by-4.0
copyright
WoRMS Editorial Board
contributor
Gofas, Serge [email]

Distribution

provided by World Register of Marine Species
Atlantic, from Norway to Morocco, also in the Canary Is. and the Azores. Mediterranean at least in the Western Basin. Gorringe, Ampère, Josephine and Seine seamounts, common in 180-550 m; Great Meteor, Hyères, Irving, Plato, and Atlantis seamounts, moderately common in 300-730 m.
license
cc-by-4.0
copyright
WoRMS Editorial Board
contributor
Gofas, Serge [email]

Habitat

provided by World Register of Marine Species
Known from seamounts and knolls

Reference

Stocks, K. 2009. Seamounts Online: an online information system for seamount biology. Version 2009-1. World Wide Web electronic publication.

license
cc-by-4.0
copyright
WoRMS Editorial Board
contributor
[email]