Clanculus bronni explained

Clanculus bronni is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.^{[1] [2]}

Description

The size of the shell varies between 5 mm and 7 mm. The perforate shell has a globose-conoid shape. It is brownish and white variegated. The six whorls are convex, the last subangulate toward the base. The base of the shell is planoconvex. The narrow umbilicus crenated. The aperture is subrotund. The lip is costate within. The oblique columella terminates in a thick tooth.^[3] The subspecies Clanculus bronni ssp. fraterculus H. A. Pilsbry, 1904 (synonym: Clanculus hizenensis fraterculus Pilsbry, 1904 - original combination) is described by Pilsbry as trochiform with a flattened base. The ground color is nearly white, radially maculated with brown on the upper surface and smaller spots interposed between the others at the peripheral region. The base has paler small spots on the ribs, sometimes partially arranged in radial stripes. The 5½ or 6 whorls are convex and parted by a narrow, deep suture. The apical 1½ whorls are uniform, the next whorls irregularly dotted with pink on a pale buff-brown ground.

Distribution

This marine species occurs in the Indo-Pacific and off Japan, Singapore, Malaysia, Thailand and Australia (Northern Territory, Queensland)

References

• Dunker, W. (1859): Neue japanische Mollusken Malakozoologische Blätter 6, pp. 221–240
• Brazier, J. 1877. Continuation of the Mollusca collected during the Chevert Expedition. Proceedings of the Linnean Society of New South Wales 2: 41-53
• Hedley, C. 1901. A revision of the types of the marine shells of the "Chevert" Expedition. Records of the Australian Museum 4: 121-130
• Iredale, T. 1929. Queensland molluscan notes, No. 1. Memoirs of the Queensland Museum 9(3): 261-297, pls 30-31
• Wilson, B. 1993. Australian Marine Shells. Prosobranch Gastropods. Kallaroo, Western Australia : Odyssey Publishing Vol. 1 408 pp.
• 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

External links

• Encyclopedia of Life
• GenBank (4 nucleotides; 1 proteins)
• World Register of Marine Species

Notes and References

1. Bouchet, P. (2012). Clanculus bronni (Dunker, 1860). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=547250 on 2012-11-23
2. Poppe G.T., Tagaro S.P. & Dekker H. (2006) The Seguenziidae, Chilodontidae, Trochidae, Calliostomatidae and Solariellidae of the Philippine Islands. Visaya Supplement 2: 1-228.
3. https://archive.org/details/manualofconcholo111tryo H. Pilsbry, Manual of Conchology XI, Academy of Natural Sciences, Philadelphia