| Lyonsia norwegica (Gmelin, 1791) |
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Iceland & Norway, northern Baltic, to Canarias, Madeira, Mediterranean; absent from southern North Sea and Pas-de-Calais (MBSBI).
The species lays at the surface of muddy sand or maërl, from 15m deep to shelf depths, in areas subject to significant but not violent streams, and not exposed to swell (Conchylinet).
Original taxon: Mya norwegica. Synonyms: coruscans, elongata, pellucida, striata, truncata…
Above: a specimen devoid of radial ribs.
30-40m deep, Málaga, Andalucia, S. Spain. 41mm. |
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Lyonsia norwegica (222) and Pandora inaequivalvis (223) figured in L. A. Reeve: Elements of conchology plate XLI, London 1860 via BHL.
Both species possess a shell adapted to surface-feeding by filtration in streams (truncated posterior end, flat valves). |
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| The species in G. B. Sowerby: A conchological manual, 3rd. edition, London 1846, via BHL. |
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Infralittoral, Omiš area, Split-Dalmatia Comit., S. Croatia. 35mm.
Original pictures provided by N. Lete (HR).
– CC BY-NC-SA) – |
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Type specimen of Mya striata Montagu, 1816, collected at Tenby, Pembrokeshire, Wales, in the Montagu Collection at the Royal Albert Memorial Museum & Art Gallery, Exeter, Devon, South West England. Size about 37,5mm.
Original pictures provided by Olivier, Morgenroth & Salvador for Wikimedia Commons – (CC BY). |
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20m deep, Kaštela Bay, Split, Dalmatia, S. Croatia. 20mm. Original picture provided by R. Stanić (HR).
– CC BY-NC-SA) – |