Similipecten similis (Laskey, 1811)
LASKEY, J. 1811. Account of North British Testacea. Memoirs of the Wernerian Natural History Society, 1: 370-417, pl. 8 [p. 387, pl. 8, fig. 8]
1811 Pecten similis Laskey, 1811
1819 Ostrea tumida Turton, 1819
1830 Pecten exilis Eichwald, 1830
1835 Pecten squama Scacchi, 1835
1835 Pecten minimus Sars, 1835
1835 Pecten pullus Cantraine, 1835
1888 Pecten similis var. radiata Locard, 1888
1888 Pecten similis var. maculata Locard, 1888
1888 Pecten similis var. luteola Locard,1888
1888 Pecten similis var. elata Locard, 1888
1888 Pecten similis var. alba Locard, 1888
1888 Pecten (Cyclopecten) commutabilis Fenaux, 1944
1819 Ostrea tumida Turton, 1819
1830 Pecten exilis Eichwald, 1830
1835 Pecten squama Scacchi, 1835
1835 Pecten minimus Sars, 1835
1835 Pecten pullus Cantraine, 1835
1888 Pecten similis var. radiata Locard, 1888
1888 Pecten similis var. maculata Locard, 1888
1888 Pecten similis var. luteola Locard,1888
1888 Pecten similis var. elata Locard, 1888
1888 Pecten similis var. alba Locard, 1888
1888 Pecten (Cyclopecten) commutabilis Fenaux, 1944
J. Laskey, 1911, plate 8.
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«At first I had doubts respecting this being the Pecten laevis of Montagu; but having since received a specimen from Mr Montagu of the true Pecten laevis I find it to be distinct. I have therefore for the present named it similis. It is a thin semitransparent shell, with unequal ears, of a compressed globose form, perfectly smooth, and beautifully clouded with brown. I have seen shells from the Mediterranean, particularly from Minorca, strongly resembling this specimen; two odd valves of which have only been met with by the dredge in the Frith of Forth.»
JAMES LASKEY, 1811
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Type material
Not searched for by the present authors. Types of Laskey are supposed to be in the Hunterian Museum, Glasgow. Type locality
Firth of Forth, Scotland. Distribution
North-eastern Atlantic (70°N–15°N), bathymetric range usually 25–500 m, living on fine silt to sand. A long-lived and frequently cited record from 3.6 m (Forbes&Hanley 1849: 293) represents an exception. In Scandinavia it occursmore shallow, from ca. 25–50 m (SMNH). Found at 76 BIOICE stations in 104–1000 m, usually more shallow than 300 m (Map 6). Description
Shell (Figures 6C, 7A,G–I) up to ca. 7 mm high, weakly convex, right valve slightly more convex than left one, semi-opaque, slightly longer than high; posterior auricles larger and longer than anterior ones; umbonal angle ca. 120. Colour strongly variable whitish, mottled with red and yellowish brown. Prodissoconch (Figure 2C), length 145 μm, colour white. Both valves smooth (Figures 9I,J, 10C,D), sometimes weakly sculptured with delicate growth lines. Anterior auricles weakly sculptured with closely spaced commarginal lirae or lamellae; posterior auricles nearly smooth. Hinge line straight, except near the antero-dorsal margin where it is somewhat curved. No internal riblets, except two small auricular ones (sometimes nearly lacking). Byssal notch small, byssal fasciole very narrow or nearly absent, ctenolium lacking. Remarks
Juvenile specimens of Similipecten oskarssoni could be confused with S. similis, but the sculpture of the umbo of the left valve in oskarssoni is visible already at a size of 2 mm. For further differences see Table I.» DIJKSTRA, H. H., A. WARÉN & G. GUDMUNDSSON. 2009. Pectinoidea (Mollusca: Bivalvia) from Iceland. Marine Biology Research, 5: 207-243, figs. 1-20. [p. 222, 223]
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Similipecten similis (Laskey, 1811); H. H. Dijkstra, A. Warén & G. Gudmundsson, 2009, Pectinoidea (Mollusca: Bivalvia) from Iceland, figures 6C, 7A, 7G-7I.
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