Trochus

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Trochus
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Superfamily: Trochoidea
Family: Trochidae
Genus: Trochus
Linnaeus, 1758
Species

See text

Synonyms[1]
  • Infundibulum (Lamprostoma) Swainson, 1840
  • Lamprostoma Swainson, 1840
  • Polydonta Schumacher, 1817
  • Trochus (Camelotrochus) B. A. Marshall, 1998
  • Trochus (Polydonta) Schumacher, 1817
  • Trochus (Trochus) Linnaeus, 1758
  • Trochus (Zizyphinus) Gray, 1847

Trochus is a genus of medium-sized to large, top-shaped sea snails with an operculum and a pearly inside to their shells, marine gastropod molluscs in the family Trochidae, the top snails.[1]

History

The name Trochus, according to P. Fischer [2] was used for the first time by Guillaume Rondelet, in 1558, who assembled under this title a rather miscellaneous assortment of univalves, including a true Trochus. Linnaeus' genus Trochus is composed principally of true Trochidae, but contains also species of several very different families. Lamarck still further restricted the group by eliminating several genera; and in the 19th century the labors of Gray, H. Adams and A. Adams and others, have contributed much toward a systematic arrangement of the family.[3] Further revisions have narrowed down the number of species in this genus. Many names have become synonyms.

Shell description

Sea snails in the genus Trochus have large, thick, solid,shells that have a broadly conical spire and a flat base. The periphery is angulated. The base of the shell is flat or convex. The outer and basal lips are smooth within. The columella has a strong fold above, ending in an obtuse tooth below.[3]

The interior of the shell is pearly and iridescent because of a layer of nacre (mother of pearl).

Species

Species within the genus Trochus include:[1]

The following species were brought into synonymy:[1]

The following species are nomina dubia (names of unknown or doubtful application):[1]

  • Trochus bicinctus Philippi, 1849 (nomen dubium)
  • Trochus quadricinctus Mühlfeld, 1824 (nomen dubium)

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Bouchet, P.; Gofas, S. (2010). Trochus Linnaeus, 1758. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138598 on 5 December 2012
  2. ↑ P. Fischer. Monog. Genre Troque, in Kiener's Coquilles Vivantes, Paris, 1880.
  3. ↑ 3.0 3.1 Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
  • Linnaeus, C. (1758). Systema Naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Editio decima, reformata. Laurentius Salvius: Holmiae. ii, 824 pp.
  • Herbert G.G. (1993). Revision of the Trochinae, tribe Trochini (Gastropoda: Trochidae) of southern Africa. Annals of the natal Museum 34(2):239-308.
  • 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

Further reading

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