Chlamys islandicus, copyright Acélan.

Belongs within: Pectinoidea.

Chlamys is a genus of scallops that first appeared in the Triassic. Members of the genus generally live in fissures attached to the substrate by a byssus. In members of the type subgenus, the cardinal teeth of the hinge are weak or nearly obsolete (Cox et al. 1969).

Characters (from Cox et al. 1969): Higher than long or rounded, commonly somewhat oblique; left valve usually more convex but in some species valves nearly equally convex; auricles clearly delimited, usually large; byssal notch large; ctenolium usually present; sculpture of radial (usually stronger) and concentric elements, with scalelike spines commonly developed at their junctions, especially on left valve but some shells nearly smooth; interspaces of many forms with intercalaries in adult; margin usually scalloped; cardinal crura variable in number and size.

<==Chlamys Röding 1798 S98
    |--*C. (Chlamys) islandicus (Müller 1776) S98
    |--C. (Lyriochlamys Sobetski 1977) S98
    |    |--C. (*L.) fissicosta (Etheridge 1881) [=Pecten fissicosta] S98
    |    `--C. (L.) propesalebrosa Darragh & Kendrick 1991 [=C. (Microchlamys) propesalebrosa] S98
    |--C. (*Microchlamys) pulchella (Nilsson 1827) [=Pecten pulchellus] S98
    |--C. (Praechlamys) weiyuanensis TE01
    `--C. (Zygochlamys Ihering 1907) P61
         |--C. (*Z.) geminata [=Pecten geminata] P61
         `--C. (Z.) delicatula (Hutton 1873) [incl. C. campbellicus Odhner 1924, C. subantarctica Hedley 1916] P61

Chlamys incertae sedis:
  C. anguineus Finlay 1927 [=Pecten undulatus Sowerby 1842 non Nilsson 1827] F27b
  C. antiaustralis F27a
  C. challengeri (Smith 1891) MG-H11
  C. convexus F27a
  C. cookei Dall, Bartsch & Rehder 1938 BW09
  C. cracenticostata Darragh & Kendrick 1991 S98
  C. crassicostatus (Sowerby 1842) [=Pecten crassicostatus] H09
  C. cretosus Defr. 1822 [incl. Pecten undulatus Nilsson 1827] F27b
  C. crouchi Smith 1892 H09
  C. cruentatus (Reeve 1853) [=Pecten cruentatus] H09
  C. cuneatus (Reeve 1853) [=Pecten cuneatus] H09
  C. dringi (Reeve 1853) [=Pecten dringi] H09
  C. farreri PB07
  C. flabellatus (Lamarck 1819) [=Pecten flabellatus] H09
  C. fricatus (Reeve 1853) [=Pecten fricatus] H09
  C. funebris (Reeve 1853) BW09 [=Pecten funebris H09]
  C. hastata GW02
  C. hericius (Gould 1850) R78
  C. imparicostatus [=C. imparvicostatus (l. c.)] F27a
  C. kaiparaensis Finlay 1924 [=Pecten subconvexus Marshall 1918 (preoc.)] F27b
  C. lemniscatus (Reeve 1853) [=Pecten lemniscatus] H09
  C. lentiginosus (Reeve 1853) [=Pecten lentiginosus] H09
  C. limatula (Reeve 1853) [=Pecten limatula] H09
  C. lowei (Hertlein 1935) PP78
  C. madreporarum (Sowerby 1847) [=Pecten madreporarum] H09
  C. maldivensis Smith 1904 H09
  C. moretonicus Finlay 1927 [=Pecten pulchellus Reeve 1853 non Nilsson 1827] F27b
  C. pacifica Broderip 1835 BW09
  C. pallium (Linnaeus 1758) [=Ostrea pallium] H09
  C. patagonicus F27a
  C. pseudolima (Sowerby 1842) [=Pecten pseudolima] H09
  C. ruoergaiensis TE01
  C. senatorius (Gmelin 1791) [=Ostrea senatoria] H09
  C. septemradiata P75
  C. singaporinus (Sowerby 1842) [=Pecten singaporinus] H09
  C. strangei (Reeve 1852) [=Pecten strangei] H09
  C. townsendi (Sowerby 1895) ES88
  C. varia GW02

*Type species of generic name indicated


[BW09] Bryce, C. & C. Whisson. 2009. The macromolluscs of Mermaid (Rowley Shoals), Scott and Seringapatam Reefs, Western Australia. Records of the Western Australian Museum Supplement 77: 177–208.

Cox, L. R., N. D. Newell et al. 1969. Treatise on Invertebrate Paleontology pt N. Bivalvia vol. 1. The Geological Society of America, Inc. and The University of Kansas.

[ES88] Emerson, W. K., & W. E. Sage, III. 1988. A new species of Vasum (Gastropoda: Turbinellidae) from off Somalia. Nautilus 102 (1): 36–39.

[F27a] Finlay, H. J. 1927a. A further commentary on New Zealand molluscan systematics. Transactions and Proceedings of the New Zealand Institute 57: 320–485.

[F27b] Finlay, H. J. 1927b. New specific names for austral Mollusca. Transactions and Proceedings of the New Zealand Institute 57: 488–533.

[GW02] Giribet, G., & W. Wheeler. 2002. On bivalve phylogeny: a high-level analysis of the Bivalvia (Mollusca) based on combined morphology and DNA sequence data. Invertebrate Biology 121 (4): 271–324.

[H09] Hedley, C. 1909. The Marine Fauna of Queensland: Address by the President of Section D. Australasian Association for the Advancement of Science: Brisbane.

[MG-H11] McEnnulty, F. R., K. L. Gowlett-Holmes, A. Williams, F. Althaus, J. Fromont, G. C. B. Poore, T. D. O’Hara, L. Marsh, P. Kott, S. Slack-Smith, P. Alderslade & M. V. Kitahara. 2011. The deepwater megabenthic invertebrates on the western continental margin of Australia (100–1100 m depths): composition, distribution and novelty. Records of the Western Australian Museum Supplement 80: 1–191.

[PB07] Philippe, H., H. Brinkmann, P. Martinez, M. Riutort & J. Baguña. 2007. Acoel flatworms are not Platyhelminthes: evidence from phylogenomics. PloS One 2 (8): e717.

[PP78] Poorman, F. L., & L. H. Poorman. 1978. Additional molluscan records from Bahía de Los Angeles, Baja California Norte. Veliger 20 (4): 369–374.

[P75] Por, F. D. 1975. Pleistocene pulsation and preadaptation of biotas in Mediterranean seas: consequences for Lessepsian migration. Systematic Zoology 24 (1): 72–78.

[P61] Powell, A. W. B. 1961. Shells of New Zealand: An illustrated handbook 4th ed. Whitcombe and Tombs Limited: Christchurch.

[R78] Reid, R. G. B. 1978. The systematic, adaptive and physiological significance of proteolytic enzyme distribution in bivalves. Veliger 20 (3): 260–265.

[S98] Stilwell, J. D. 1998. Late Cretaceous Mollusca from the Chatham Islands, New Zealand. Alcheringa 22 (1): 29–85.

[TE01] Tong, J., & D. H. Erwin. 2001. Triassic gastropods of the southern Qinling Mountains, China. Smithsonian Contributions to Paleobiology 92: 1–47.

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