''Calliotrochus marmoreus'' is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

sea snail Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...

, a marine

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...

in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Trochidae The Trochidae, common name top-snails or top-shells, are a family of various sized sea snails, marine gastropod molluscs in the subclass Vetigastropoda. This family is commonly known as the top-snails because in many species the shell resembles ...

, the top snails.Bouchet, P. (2012). ''Calliotrochus marmoreus'' (Pease, 1861). Accessed through:

World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...

at http://www.marinespecies.org/aphia.php?p=taxdetails&id=567748 on 2012-11-23Vilvens C. (2012) New species and new records of Seguenzioidea and Trochoidea (Gastropoda) from French Polynesia. Novapex 13(1): 1-23. (10 March 2012)

Description

The height of the shell attains 6 mm, its diameter also 6 mm. The small shell has a globose-turbinate shape and is narrowly perforate. It is thin, smooth, shining, marbled and mottled with various shades of olive, brown and pinkish, usually showing dots of white, or spiral lines of white and pink or brown articulated. The conical

spire A spire is a tall, slender, pointed structure on top of a roof of a building or tower, especially at the summit of church steeples. A spire may have a square, circular, or polygonal plan, with a roughly conical or pyramidal shape. Spire ...

is short and has a minute, acute

apex The apex is the highest point of something. The word may also refer to: Arts and media Fictional entities * Apex (comics) A-Bomb Abomination Absorbing Man Abraxas Abyss Abyss is the name of two characters appearing in Ameri ...

. The sutures are impressed. The about 5

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). In nature File:Photograph and axial plane floral diagra ...

s are rounded. The

body whorl The body whorl is part of the morphology (biology), morphology of the gastropod shell, shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk ...

is large, convex below and indented around the narrow white

umbilicus Umbilicus may refer to: *The navel or belly button *Umbilicus (mollusc), a feature of gastropod, Nautilus and Ammonite shell anatomy *Umbilicus (plant), ''Umbilicus'' (plant), a genus of over ninety species of perennial flowering plants *Umbilicus ...

. The oblique

aperture In optics, the aperture of an optical system (including a system consisting of a single lens) is the hole or opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image o ...

is rounded-oval, with a very thin layer of bluish iridescent nacre within. The outer, basal and

columella Lucius Junius Moderatus Columella (, Arabic: ) was a prominent Roman writer on agriculture in the Roman Empire. His in twelve volumes has been completely preserved and forms an important source on Roman agriculture and ancient Roman cuisin ...

margins are well curved, thin, simple, and converging and united across the parietal wall by a thin layer of callus

Distribution

This marine species occurs in the following locations: *

Red Sea The Red Sea is a sea inlet of the Indian Ocean, lying between Africa and Asia. Its connection to the ocean is in the south, through the Bab-el-Mandeb Strait and the Gulf of Aden. To its north lie the Sinai Peninsula, the Gulf of Aqaba, and th ...

* tropical Indo-Pacific *

Hawaii Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...

Queensland Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Austr ...

, Australia

References

* Pease, W.H. 1861. ''Descriptions of 47 new species of shells from the Sandwich Islands, in the collection of H. Cuming''. Proceedings of the Zoological Society of London 1860: 431-438 * Garrett, A. 1857. ''On new species of marine shells of the Sandwich Islands.'' Proceedings of the California Academy of Sciences 1: 102-103 * Deshayes, G.P. 1863. ''Catalogue des Mollusques de l'Île de la Réunion (Bourbon).'' Annexe E in Maillard, L. (ed). Notes sur l'isle de La Réunion. Paris : Dentu * Hedley, C. 1899. ''The Mollusca of Funafuti. Part 1. Gastropoda''. Memoirs of the Australian Museum 3(7): 395-488 * Preston, H.B. 1908. ''Descriptions of new species of land, marine and freshwater shells from the Andaman Islands.'' Records of the Indian Museum 2(2): 187-210, pls 14-17 * Hedley, C. 1923. ''Studies on Australian Mollusca. Part XIV''. Proceedings of the Linnean Society of New South Wales 48: 301-316, pls 30-33 * Iredale, T. 1937. ''Mollusca''. 232-261, pls. 15-17 in Whitley, G.P. The Middleton and Elizabeth Reefs South Pacific Ocean. The Australian Zoologist 8: 232-261 * Ladd, H.S. 1966. ''Chitons and gastropods (Haliotidae through Adeorbidae) from the western Pacific Islands''. United States Geological Survey Professional Papers 531: 1-98 16 pls * Kilburn, R.N. 1977. ''Taxonomic studies on the marine Mollusca of southern Africa and Mozambique. Part 1.'' Annals of the Natal Museum 23(1): 173-214 * Kay, E.A. 1979. ''Hawaiian Marine Shells. Reef and shore fauna of Hawaii. Section 4 : Mollusca''. Honolulu, Hawaii : Bishop Museum Press Bernice P. Bishop Museum Special Publication Vol. 64(4) 653 pp * Herbert, D.G. 1998. ''Revision of the genus Calliotrochus Fischer, 1879 (Gastropoda: Trochoidea)''. Invertebrate Taxonomy 12: 545-565 * Dekker, H. & Orlin Z. 2000. ''Checklist of Red Sea Mollusca''. Spirula 47(Supplement): 1-46

External links

World Register of Marine Species
{{Taxonbar, from=Q5022576 marmoreus Gastropods described in 1861