Lissochlamys exotica (Dillwyn, 1817)
DILLWYN, L. W. 1817. A descriptive catalogue of Recent shells, arranged according to the Linnaean method; with particular attention to the synonymy. Vol. I. 1-580 pp. Printed for John and Arthur Arch, Cornhill. London [p. 259]
1817 Ostrea exotica Dillwyn, 1817
1819 Pecten dispar Lamarck, 1819
1842 Pecten pseudamusium [Klein] Sowerby II, 1842
1842 Pecten orbicularis G. B. Sowerby II, 1842
1853 Pecten loveni Dunker, 1853
1819 Pecten dispar Lamarck, 1819
1842 Pecten pseudamusium [Klein] Sowerby II, 1842
1842 Pecten orbicularis G. B. Sowerby II, 1842
1853 Pecten loveni Dunker, 1853
Pecten exoticus; J. H. Chemnitz, 1795. Neues Systematisches Conchylien-Cabinet, plate 207, figures 2037, 2038.
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«Shell sub-orbicular, slender and smooth; margin acute and entire.
Pecten exoticus. Chemnitz, xi. p. 262. t. 207. f. 2037 and 2038. Inhabits the Red Sea. Chemnitz. Shell about an inch and a quarter long, and the breadth rather exceeds the length; the colour is pale brown, with darker somewhat triangular rays, and mottled with white towards the margin; Chemnitz has described the ears to be equal, but they are represented quite otherwise in the figure.» LEWIS WESTON DILLWYN, 1817
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«Distribution.— Tropical eastern Atlantic, from Mauritania southwards to Angola. Living littorally on soft sediments (sand, mud) in colonies. Present specimen dead in 19 m.
Description.— Shell up to c. 40 mm in height, thin, compressed, orbicular, nearly equivalve and equilateral. Left valve slightly more convex than right valve. Auricles subequal in size and small; umbonal angle c. 110°. Both valves smooth or sculptured with delicate radial riblets laterally, weaker or nearly absent on right valve. Antimarginal microsculpture only laterally present. Auricles with fine radial riblets (4-8) or nearly smooth and nearly continuous with disc, except anterior auricle of right valve. Hinge straight. Byssal notch deep; byssal fasciole deep-lying. Active ctenolium well developed with knobby teeth. Colour variable, left valve brownish with maculations or uniform coloured, right valve paler or whitish. Remarks.— The present species is often referred to as Ostrea hybrida Gmelin, 1791 (see Grau, 1959: 58). However, Gmelin's references to Lister (1687) and Klein (1753) most probably refers to Ostrea exotica Dillwyn, 1817, whereas the reference to Chemnitz (1784) points to Pecten septemradiatus Müller, 1776, as does Gmelin's diagnosis and reported locality.» DIJKSTRA, H. H. & J. GOUD. 2002. Pectinoidea (Bivalvia, Propeamusidae & Pectinidae) collected during the Dutch CANCAP and MAURITANIA expeditions in the south-eastern region of the North Atlantic Ocean. CONCAP-Project contribution Nº 127. Basteria, 66: 31-82. [pp. 52, 53]
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Lissochlamys exotica; H. H. Dijkstra & J. Goud, 2002, figures 45-49, probable syntypes of Ostrea exotica from ZMUC (ex.coll. Mus. Moltk.)
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