Similipecten Winckworth, 1932
WINCKWORTH, R. 1932. The British marine Mollusca. Journal of Conchology, 19: 211-252. [p. 241, 250]
«Similipecten. A sub-genus of Chlamys in which the valves are small thin discoidal and sculptured with fine corcentric striations: very fine radial striae may be present, typically almost imperceptible, but in certain species "Camptonectes" sculpture is also present, and minute prickles are developed. The interior shows very fine radial striae. The hinge line is relatively long and the
margins of the ears sloping outwards, so that the posterior ear is nearly continuous with the contour of the shell; the byssal notch is deep. The type species is Pecten similis Laskey.» RONALD WINCKWORTH, 1932
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Pecten similis Laskey; J. Laskey, 1811, Account of North British Testacea, plate 8, figure 8.
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Similipecten colmani sp. nov.; H. H. Dijkstra & A. G. Beu, 2018, Living scallops of Australia and adjacent waters, figures 19E-19I.
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«Similipecten Winckworth, 1932
Similipecten Winckworth, 1932: 241, 250 (proposed as a subgenus of Chlamys). Type species (by original designation): Pecten similis Laskey, 1811; Recent, Firth of Forth, Scotland.
Arctinula Thiele, 1934: 806 (proposed as a section of Palliolum). Type species (by original designation): Pecten greenlandicus G. B. Sowerby II, 1842; Recent, Greenland. Diagnosis. A byssally attached or free-living, small to medium-sized, flattened propeamussiid; shell (sub)circular, opaque or translucent, smooth or sculptured with minute commarginal growth lines or fine striae; auricles almost equal in size, anterior auricle of right valve demarcated from shell disc, other auricles less clearly demarcated; byssal gape moderately deep; ctenolium absent; hinge dentition rather broad.
Distribution. Early Oligocene–Recent (pers. comm. D. Jablonski, 2017). Arctic to tropical Atlantic, NW Indian Ocean eastwards to southwestern Pacific, littoral (Arctic and boreal region) to bathyal depths.
Discussion. Similipecten was proposed by Winckworth (1932: 241) as a subgenus of Chlamys. Hertlein (1969: N354), however, placed Similipecten in the Eburneopecten group as a synonym of Palliolum (Delectopecten) Stewart, 1930. Similipecten is now assigned to the Propeamussiidae (Waller, 1984: 213; Dijkstra, 1991: 23; Dijkstra, 2002: 42) or to Propeamussiinae (Schein, 1989: 95). The morphological characters of Arctinula and Similipecten are identical (shell very fragile and subcircular, laterally flattened, hyaline to opaque, generally smooth, lacking internal riblets, byssal notch moderately developed, lacking a ctenolium) and we consider them to be synonyms.»
DIJKSTRA, H. H. & A. G. BEU. 2018. Living scallops of Australia and adjacent waters (Mollusca: Bivalvia: Pectinoidea: Propeamussiidae, Cyclochlamydidae and Pectinidae). Records of the Australian Museum, 70 (2): 113-330, figs. 1-102. [p. 152, 153]
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