''Falsimargarita'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

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 ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

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 ...

s 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 ...

Calliostomatidae Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (2013). Calliostomatidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetail ...

Description

This genus differs from the other genera in the family Calliostomatidae by several characteristics: the conspicuous spiral

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, obvious

sculpture Sculpture is the branch of the visual arts that operates in three dimensions. Sculpture is the three-dimensional art work which is physically presented in the dimensions of height, width and depth. It is one of the plastic arts. Durable sc ...

, an open umbilicus, a thin shell and external

iridescence Iridescence (also known as goniochromism) is the phenomenon of certain surfaces that appear to gradually change color as the angle of view or the angle of illumination changes. Examples of iridescence include soap bubbles, feathers, butterfl ...

Distribution

The species of this cold-water genus occurs in

Antarctic The Antarctic ( or , American English also or ; commonly ) is a polar region around Earth's South Pole, opposite the Arctic region around the North Pole. The Antarctic comprises the continent of Antarctica, the Kerguelen Plateau and other ...

waters and off the Magellanic Region of South America.

Species

Species within the genus ''Falsimargarita'' include: * '' Falsimargarita atlantoides'' (Quinn, 1992) * ''

Falsimargarita benthicola ''Falsimargarita benthicola'' is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae. Description The height of the shell attains 21 mm. Distribution This marine species occurs off the Drake Passage ...

'' Dell, 1990 * '' Falsimargarita callista'' B. A. Marshall, 2016 * ''

Falsimargarita challengerica ''Falsimargarita challengerica'' is a species of sea snail, a marine gastropod mollusk, in the family Calliostomatidae Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (20 ...

'' B. A. Marshall, 2016 * ''

Falsimargarita coriolis ''Falsimargarita coriolis'' is a species of sea snail, a marine gastropod mollusk, in the family Calliostomatidae Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (2013). ...

'' B. A. Marshall, 2016 * '' Falsimargarita coronata'' (Quinn, 1992) * ''

Falsimargarita eximia ''Falsimargarita eximia'' is a species of sea snail, a marine gastropod mollusk, in the family Calliostomatidae Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (2013). Ca ...

'' B. A. Marshall, 2016 * ''

Falsimargarita gemma ''Falsimargarita gemma'' is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae. Description (Original description by Edgar E. Smith) The size of the shell varies between 12 mm and 25 mm. The thin, turb ...

'' (E.A. Smith, 1915) * ''

Falsimargarita georgiana ''Falsimargarita georgiana'' is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae. Description The size of the shell varies between 20 mm and 31 mm. It has a rounded whorl profile and a uniform spira ...

'' Dell, 1990 * '' Falsimargarita glaucophaos'' (Barnard, 1963) * '' Falsimargarita imperialis'' (Simone & Birman, 2006) * ''

Falsimargarita iris ''Falsimargarita iris'' is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.Bouchet, P. (2012). ''Falsimargarita iris'' (E.A. Smith, 1915). Accessed through: World Register of Marine Species at http://www.mari ...

'' (E.A. Smith, 1915) * ''

Falsimargarita kapala ''Falsimargarita kapala'' is a species of sea snail, a marine gastropod mollusk, in the family Calliostomatidae Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (2013). Ca ...

'' B. A. Marshall, 2016 * ''

Falsimargarita nauduri ''Falsimargarita nauduri'' is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (2013). Ca ...

'' Warén & Bouchet, 2001 * †'' Falsimargarita parvispira'' Quilty, Darragh, Gallagher & Harding, 2016 * ''

Falsimargarita renkeri ''Falsimargarita'' is a genus of sea snails, marine gastropod mollusks in the family Calliostomatidae. Description This genus differs from the other genera in the family Calliostomatidae by several characteristics: the conspicuous spiral who ...

'' Engl, 2020 * ''

Falsimargarita stephaniae ''Falsimargarita stephaniae'' is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae. Description Distribution This species occurs in the Atlantic Ocean off the Falkland Islands The Falkland Islands (; ...

'' Rios & Simone, 2005 * ''

Falsimargarita tangaroa ''Falsimargarita tangaroa'' is a species of sea snail, a marine gastropod mollusk, in the family Calliostomatidae Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.Gofas, S. (2013). ...

'' B. A. Marshall, 2016 * '' Falsimargarita terespira'' Simone, 2008 * ''

Falsimargarita thielei ''Falsimargarita thielei'' is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae. Description The size of the shell varies between 8 mm and 22 mm. Distribution This marine species occurs off the South ...

'' (Hedley, 1916)

References

* Dell R.K. (1990). ''Antarctic Mollusca with special reference to the fauna of the Ross Sea''. Bulletin of the Royal Society of New Zealand., 27, 1–3,264-285 pp. page(s): 93 * Marshall, B. A. (2016). New species of Venustatrochus Powell, 1951 from New Zealand, and new species of Falsimargarita Powell, 1951 and a new genus of the Calliostomatidae from the southwest Pacific, with comments on some other calliostomatid genera (Mollusca: Gastropoda). Molluscan Research. 36: 119-141

External links

Powell A. W. B. (1951). Antarctic and Subantarctic Mollusca: Pelecypoda and Gastropoda. Discovery Reports, 26: 47-196, pl. 5-10
{{Taxonbar, from=Q5432780 Calliostomatidae Gastropod genera