Camptonectes laminatus (J. Sowerby, 1818)
SOWERBY, J. & J. DE C. SOWERBY. 1812-1846. The Mineral Conchology of Great Britain; or coloured figures and descriptions of those remains of testaceous animals or shells. 7 vols., pls. 1-648 (and 2 bis). London. [v. 3, p. 4, pl. 205, fig. 4]
1818 Pecten laminata J. Sowerby, 1818
1818 Pecten similis J. Sowerby, 1818
1818 Pecten rigida J. Sowerby, 1818
1850 Pecten langrunensis Orbigny, 1850
1853 Pecten woodwardii Morris & Lycett, 1853
1869 Pecten anguliferus Terquem & Jourdy, 1869
1818 Pecten similis J. Sowerby, 1818
1818 Pecten rigida J. Sowerby, 1818
1850 Pecten langrunensis Orbigny, 1850
1853 Pecten woodwardii Morris & Lycett, 1853
1869 Pecten anguliferus Terquem & Jourdy, 1869
J. Sowerby, 1818, plate 205.
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«SPEC. CHAR. Suborbicular, depressed, striated; striae arched, diverging: ears triangular, unequal; the largest plaited.
THE striae are slightly undulated; to the naked eye they appear smooth, but when carefully examined with a lense, minute lines may be traced across them. The plaits upon the ear form a strong character, whence the name. In shelly Limestone (Cornbrash) at Chatley Lodge, in Somersetshire.» JAMES SOWERBY, 1818
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«2. AMENDED DIAGNOSIS
Distinguished from all other species of C. (Camptonectes) by the coarseness of the divaricate ornament on the disc and the strength of the comarginal lamellae on the anterior auricle of the left valve.
3. AMENDED DESCRIPTION
Essentially similar to C. (C.) auritus except for the diagnostic features (see Section 2), smaller maximum height (59.5 mm, IMLAY, 1964), apparent allometric decrease in N/L (text fig. 112) and somewhat thicker shell. The remaining metric proportions are plotted in text figs. 108-111, 113-115, while the range of ornamental variation is depicted in PI. 4, Figs. 10, 12-16.
4. DISCUSSION
are indistinguishable from the species described in Section 3 on the basis of metric proportions and ornament. The original figure of Camptonectes sp; ROSSI RONCHETTI and FANTINI SESTINI (4) is similarly inseparable.
Since the number of divaricate Striae increases during the ontogeny of thespeciesdescribed in Section 3, species erected for small specimens with relatively few striae ('P.' rigida J. SOWERBY, 'P.' Langrunensis D'ORBIGNY, 'P.' Woodwardii MORRIS and LYCETT, 'P.' divaricatus PHILLIPS, 'P.' puellaris WHIDBORNE) cannot be accorded a distinction.» JOHNSON, A. L. A. 1984. The palaeobiology of the bivalve families Pectinidae and Propeamussiidae in the Jurassic of Europe. Zitteliana, 11: 1-235, pls. 1-11. [p. 125, 126]
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Camptonectes (Camptonectes) laminatus (J. Sowerby 1818); A. L. A. Johnson, 1984, The palaeobiology of the bivalve families Pectinidae and Propeamussiidae in the Jurassic of Europe, plate 4, figures 10, 12-16; ? figure 11.
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