Oxystele

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Oxystele
Oxystele tigrina 002.jpg
Oxystele tigrina
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Trochidae
Genus: Oxystele
Philippi, 1847 [1]
Type species
Trochus merula
Dillwyn, 1817

Oxystele is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails. [2] Although previously suggested as a subgenus of Diloma , [3] genetic analysis has shown it to be more appropriate as its own genus. [4]

Contents

Description

The depressed conical shell is dark or variegated in color. The large aperture is oblique. The concave columella is arcuate, thin-edged, perfectly simple and curved below. It is above spread over the umbilical area as a rounded, well-defined pad of callus. [5]

Patterns of the variegated shell color within the genus Oxystele are shown in the image : A–C Oxystele variegata from Namibia, 5 km north of Swakopmund, diameter 22.2 mm (NMSA E6038) D–F Oxystele impervia from the Western Cape, Groen Rivier, diameter 22.3 mm (NMSA E7353) G–I Oxystele sp. from the Eastern Cape, Tsitsikamma National Park, diameter 16.5 mm (HVDBM058-10, NMSA W7371); the colour pattern of these specimens suggests Oxystele variegata, but these specimens group within the unit of Oxystele impervia J–L Oxystele sp. from the Northern Cape, Noup, diameter 18.0 mm (HVDBM185-10, NMSA W7608); the colour pattern suggests Oxystele impervia, but they group with Oxystele variegata

Distribution

These marine species occur off South Africa and Japan.

Species

Oxystele burdigalensis Cossmann & Peyrot 1916, a fossil species from the Miocene of France Oxystele burdigalensis 01.JPG
Oxystele burdigalensis Cossmann & Peyrot 1916, a fossil species from the Miocene of France
Patterns of shell color within the genus Oxystele Patterns of shell colour within the genus Oxystele - ZooKeys-365-337-g004.jpg
Patterns of shell color within the genus Oxystele

Phylogram (weighted maximum parsimony based on 16S, COI and actin sequence data) of the species in the genus Oxystele: [4]

Oxystele

O. tigrina (Anton, 1839) [6]

O. sinensis (Gmelin, 1791) [7]

O. tabularis (Krauss, 1848) [8]

O. impervia (Menke, 1843) [9]

O. antoni (Anton, 1839) [10]

Other species in the genus not included in this tree are:

Species brought into synonymy:

Related Research Articles

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Tegula is a genus of small to medium-sized sea snails, marine gastropod molluscs in the family Tegulidae.

<i>Diloma</i> Genus of gastropods

Diloma is a genus of medium-sized sea snails, marine gastropod mollusks in the family Trochidae, the top snails.

<i>Trochus</i> Genus of gastropods

Trochus is a genus of medium-to large-sized, top-shaped sea snails with an operculum, of the family Trochidae, the top snails.

<i>Gibbula</i> Genus of gastropods

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<i>Clanculus</i> Genus of gastropods

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<i>Tectonatica</i> Genus of gastropods

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<i>Natica</i> Genus of gastropods

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<i>Nerita</i> Genus of gastropods

Nerita is a genus of medium-sized to small sea snails with a gill and an operculum, marine gastropod molluscs in the subfamily Neritinae of the family Neritidae, the nerites.

<i>Patella</i> (gastropod) Genus of gastropods

Patella is a genus of sea snails with gills, typical true limpets, marine gastropod mollusks in the family Patellidae, the true limpets.

<i>Phasianella</i> Genus of gastropods

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Fusus is a genus of small to large sea snails, marine gastropod molluscs in the family Fasciolariidae, the spindle snails and tulip snails.

<i>Tricolia</i> Genus of gastropods

Tricolia is a genus of sea snails, marine gastropod mollusks in the subfamily Tricoliinae of the family Phasianellidae.

<i>Chlorostoma</i> Genus of gastropods

Chlorostoma is a genus of sea snails, marine gastropod mollusks in the family Tegulidae.

<i>Margarites</i> Genus of gastropods

Margarites is a genus of sea snails, marine gastropod mollusks in the family Margaritidae.

<i>Oxystele sinensis</i> Species of gastropod

Oxystele sinensis, common name the pink-lipped topshell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

<i>Euchelus</i> Genus of gastropods

Euchelus is a genus of sea snails, marine gastropod mollusks in the family Chilodontaidae.

<i>Monodonta</i> Genus of gastropods

Monodonta is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.

<i>Stomatella</i> Genus of sea snails

Stomatella is a genus of small to medium-sized sea snails, marine gastropod mollusks in the family Trochidae, the top snails and their allies.

Fossarus is a genus of sea snails, marine gastropod mollusks in the family Planaxidae.

<i>Polititapes aureus</i> Species of bivalve

Polititapes aureus is a species of bivalve belonging to the family Veneridae.

References

  1. ↑ Philippi, Zeitschr. f Mal., 1847, p. 19
  2. ↑ Oxystele Philippi, 1847 . Retrieved through: World Register of Marine Species  on 2 July 2011.
  3. ↑ Heller, Joseph; Dempster, Yvonne (1991). "Detection of two coexisting species of Oxystele (Gastropoda: Trochidae) by morphological and electrophoretic analyses". Journal of Zoology. 223 (3): 395–418. doi:10.1111/j.1469-7998.1991.tb04773.x.
  4. 1 2 Donald, Kirsten M.; Kennedy, Martyn; Spencer, Hamish G. (2005). "The phylogeny and taxonomy of austral monodontine topshells (Mollusca: Gastropoda: Trochidae), inferred from DNA sequences". Molecular Phylogenetics and Evolution. 37 (2): 474–483. doi:10.1016/j.ympev.2005.04.011.
  5. ↑ Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
  6. ↑ Oxystele tigrina (Anton, 1839). Retrieved through: World Register of Marine Species  on 1 May 2010.
  7. ↑ Oxystele sinensis (Gmelin, 1791). Retrieved through: World Register of Marine Species  on 1 May 2010.
  8. ↑ Oxystele tabularis (Krauss, 1848). Retrieved through: World Register of Marine Species  on 1 May 2010.
  9. ↑ Oxystele impervia (Menke, 1843). Retrieved through: World Register of Marine Species  on 1 May 2010.
  10. ↑ Oxystele variegata (Anton, 1839). Retrieved through: World Register of Marine Species  on 1 May 2010.
  11. ↑ MolluscaBase eds. (2023). MolluscaBase. Oxystele R. A. Philippi, 1847. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=204998 on 2023-10-28
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