''Falsimargarita'' is a
genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
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 ...
s,
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 ...
s 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 ...
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).
In nature
File:Photograph and axial plane floral diagra ...
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
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 ...
, a thin shell and external
iridescence
Iridescence (also known as goniochromism) is the phenomenon of certain surfaces that appear gradually to change colour as the angle of view or the angle of illumination changes. Iridescence is caused by wave interference of light in microstru ...
.
Distribution
The species of this cold-water genus occurs in
Antarctic
The Antarctic (, ; commonly ) is the polar regions of Earth, polar region of Earth that surrounds the South Pole, lying within the Antarctic Circle. It is antipodes, diametrically opposite of the Arctic region around the North Pole.
The Antar ...
waters and off the
Magellanic Region of South America.
Species
Species within the genus ''Falsimargarita'' include:
* ''
Falsimargarita atlantoides''
(Quinn, 1992)
* ''
Falsimargarita benthicola''
Dell, 1990
* ''
Falsimargarita callista''
B. A. Marshall, 2016
* ''
Falsimargarita challengerica''
B. A. Marshall, 2016
* ''
Falsimargarita coriolis''
B. A. Marshall, 2016
* ''
Falsimargarita coronata''
(Quinn, 1992)
* ''
Falsimargarita eximia''
B. A. Marshall, 2016
* ''
Falsimargarita gemma''
(E.A. Smith, 1915)
* ''
Falsimargarita georgiana''
Dell, 1990
* ''
Falsimargarita glaucophaos''
(Barnard, 1963)
* ''
Falsimargarita imperialis''
(Simone & Birman, 2006)
* ''
Falsimargarita iris''
(E.A. Smith, 1915)
* ''
Falsimargarita kapala''
B. A. Marshall, 2016
* ''
Falsimargarita nauduri''
Warén & Bouchet, 2001
* †''
Falsimargarita parvispira''
Quilty, Darragh, Gallagher & Harding, 2016
* ''
Falsimargarita renkeri
''Falsimargarita'' is a genus of sea snails, marine (ocean), marine gastropod mollusks in the family (biology), family Calliostomatidae.
Description
This genus differs from the other genera in the family Calliostomatidae by several characteristi ...
''
Engl, 2020
* ''
Falsimargarita stephaniae''
Rios & Simone, 2005
* ''
Falsimargarita tangaroa''
B. A. Marshall, 2016
* ''
Falsimargarita terespira''
Simone, 2008
* ''
Falsimargarita thielei''
(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