Clanculus is an old genus. Fossils found in Italy date from the Pliocene (C. corallinus, C. elevatus, C. bonfittoi, C. jussieui)[3] The distribution of this genus is worldwide, individuals of some species sometimes occur in great numbers, from the intertidal zone up to depths of 200 m. Many species can be found in Australia, New Zealand, the Indo-Pacific, Philippines, Sri Lanka, Seychelles, Japan, South Africa, Zanzibar, Indian Ocean, the Red Sea, West Africa, Angola, North Africa and Europe.[4]
Shell description
These top shells are wide-conical and low spired. Their spirally ribbed sculpture consists of conspicuous regular rows of robust, round beads. The whorls show a profile with a deep suture and the final whorl inflated. The aperture of the shell is oval, with a strongly ridged lip. The umbilicus is generally deep. The color of the shell varies between orange, dark red, and chocolate brown.
Species
The type species, Clanculus pharaonius, was described by Carl Linnaeus in 1758 as Trochus pharaonius.
^ abBouchet, P.; Gofas, S. (2010). Clanculus Montfort, 1810. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138587 on 2011-04-07
^Jansen, P. (1995). A review of the genus Clanculus Montfort, 1810 (Gastropoda: Trochidae) in Australia, with description of a new subspecies and the introduction of a nomen novum. . Vita Marina. 43 (1-2): 39-62
Blainville, H.M.D., 1817. Dictionnaire des Sciences Naturelles dans lequel on traite méthodiquement des différens êtres de la nature.
Pilsbry, H.A., 1889. Manual of Conchology vol. XI Academy of Natural Sciences Philadelphia, Philadelphia. 1-519, pls 1-67
Satyamurti, S.T., 1952. Mollusca of Krusadai Is. I. Amphineura and Gastropoda. Bull. Madras Govt. Mus.; Nat. Hist.n.s., 1(2)(6):1-267.
Ludbrook, N. H., 1956. The molluscan fauna of the Pliocene strata underlying the Adelaide Plains. Part 3. Scaphopoda, Polyplacophora, Gastropoda (Haliotidae to Tornidae). Trans. R. Soc. SA, 79:1-36
Cotton, B.C., 1959. South Australian Mollusca. Archaeogastropoda . South Australian Government Printer, Adelaide. 1-449.
Iredale, T. & McMichael, D.F., 1962 [31/Dec/1962]. A reference list of the marine Mollusca of New South Wales. Mem. Aust. Mus., 11:0-0
Ladd, H.S., 1966 [31/Dec/1966]. Chitons and gastropods (Haliotidae through Adeorbidae) from the western Pacific Islands. United States Geological Survey, Professional Pape, 531:0-0
Rajagopal, A.S. & Mookherjee, H.P., 1978. Contributions to the molluscan fauna of India. Pt. I. Marine molluscs of the Coromandel Coast, Palk Strait and Gulf of Mannar - Gastropoda: Archaeogastropoda. Rec. Zool. Surv. India, 12:1-48
Herbert G.G. (1993). Revision of the Trochinae, tribe Trochini (Gastropoda: Trochidae) of southern Africa. Annals of the natal Museum 34(2):239-308
Wilson, B., 1993. Australian Marine Shells. Prosobranch Gastropods. Odyssey Publishing, Kallaroo, WA
Jansen, P., 1995 [July 1995]. A review of the genus Clanculus Montfort, 1810 (Gastropoda: Trochidae) in Australia, with description of a new subspecies and the introduction of a nomen novum. Vita Marina, 43(1-2):39-62.
Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180–213
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