''Calliotropis infundibulum'' is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

, a marine

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Eucyclidae Eucyclidae is a family of gastropods in the superfamily Seguenzioidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). This family has no subfamilies. Genera Genera within the family Eucyclidae include: * '' Amberley ...

Description

(Original description by Watson) The shell size varies between 6 mm and 18 mm. The shell has a conical shape with a tumid base. It is carinated and umbilicated. It is thin, translucent and pearly. Sculpture: There are two spirals, on the upper

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). Whorls in nature File:Photograph and axial plane floral ...

s, on the

body whorl The body whorl is part of the morphology of the 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. In gastropods In gastropods, the b ...

7–8,. These are pretty strong, but fine beaded threads. The first lies remote below the suture, and is sparsely ornamented by longitudinally produced, high and pointed, tubercles. It forms a shoulder on the whorl. The second projects strongly and sharply at the periphery and forms the carina. It and those below are delicately fretted with close-set small beads. The third, which meets the outer lip, lies within the contraction of the base. The last two are closer than the rest, which, however, are sometimes brought closer by the additional thread which appears among them. The oe which defines the umbilicus is more sharply beaded than the rest. Longitudinals: Below the suture and near the umbilicus the surface is sharply but delicately puckered, and these puckerings, strong in the early whorls, are in the later faintly continued across the whorls as lines of growth. The colour of the shell is yellowish white, with a brilliant nacreous sheen shining through the thin superficial calcareous layer, which becomes more opaque in drying. The high

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. Spires are ...

is scalar. The apex is minute, flattened, with the minute bulbous embryonic 1¼ whorl projecting on one side. The 8 whorls increase rapidly in size. They are rounded, but angulated by the projection of the spirals, very tumid on the base. The suture is linear, but strongly defined by the contraction of the suprajacent whorl and the flat shoulder of the one below. The round

aperture In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. An opt ...

is very slightly oblique, but on the pillar flattened, and at the point of it angulated slightly. It is nacreous within. Across the body there is no pad, but the shell is eroded, which looks like a thin callus. The outer lip is thin, not descending. The columellar lip is slightly patulous, bending flatly over the umbilicus, and then advancing in a straight line to the point of the columella, where it is slightly angulated just where the beaded umbilical spiral ends. The umbilicus is funnel-shaped, rather open, but a good deal contracted within, sharply scored with the lines of growth. The operculum is yellow, horny, very thin, consists of 7 to 8 whorls. The animal has a uniform light colour. The foot is broad, and bluntly pointed behind. There are 5, probably 6, large appendages, between which the membrane above them is edged with many small ones. Watson R. B. (1878–1883). Mollusca of H. M. S. Challenger Expedition. Journal of the Linnean Society of London
(described as ''Trochus (Margarita) infundibulum'')

Distribution

This species is distributed in European waters along the

Faroes The Faroe Islands ( ), or simply the Faroes ( fo, Føroyar ; da, Færøerne ), are a North Atlantic island group and an autonomous territory of the Kingdom of Denmark. They are located north-northwest of Scotland, and about halfway betw ...

, the North West Atlantic Ocean from

Nova Scotia Nova Scotia ( ; ; ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. Nova Scotia is Latin for "New Scotland". Most of the population are native Eng ...

North Carolina North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia and So ...

, and in the

Gulf of Mexico The Gulf of Mexico ( es, Golfo de México) is an oceanic basin, ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of ...

; also off

New Caledonia ) , anthem = "" , image_map = New Caledonia on the globe (small islands magnified) (Polynesia centered).svg , map_alt = Location of New Caledonia , map_caption = Location of New Caledonia , mapsize = 290px , subdivision_type = Sovereign st ...

. .

References

* Watson, R.B. (1879). ''Mollusca of H.M.S. 'Challenger' Expedition. Part IV''. Zool. J. Linn. Soc. 14: 692–716 * Abbott, R.T. (1974). ''American Seashells''. 2nd ed. Van Nostrand Reinhold: New York, NY (USA). 663 pp * Cernohorsky W.O. (1977). ''The taxonomy of some Southern Ocean mollusca mainly antarctic and subantarctic''. Records of the Auckland Institute and Museum, 14: 105–119. page(s): 105 * Marshall B. A. (1979). ''The Trochidae and Turbinidae of the Kermadec Ridge (Mollusca: Gastropoda)''. New Zealand Journal of Zoology 6: 521-552-page(s): 531 * 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 * Vilvens C. (2007) ''New records and new species of Calliotropis from Indo-Pacific''. Novapex 8 (Hors Série 5): 1–72. * Vilvens C. & Swennen F. (2008). ''New records of Calliotropis (Gastropoda: Chilodontidae) from central eastern Atlantic''. Novapex, 9(1): 17–32. page(s): 22–25 * Rosenberg, G., F. Moretzsohn, and E. F. García. 2009. ''Gastropoda (Mollusca) of the Gulf of Mexico'', Pp. 579–699 in Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas. * Vilvens C. & Sellanes J. (2010). ''Description of Calliotropis ceciliae new species (Gastropoda: Chilodontidae: Calliotropinae) from off Chile''. The Nautilus 124(2):107–111

External links

{{Taxonbar, from=Q5022639 infundibulum Gastropods described in 1879