Teinostoma

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Teinostoma
Teinostoma carbonnieri (MNHN-IM-2000-31069).jpeg
Shell of Teinostoma carbonnieri (syntype at MNHN, Paris)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Superfamily: Truncatelloidea
Family: Teinostomatidae
Genus: Teinostoma
H. Adams and A. Adams, 1853
Type species
Teinostoma politum
A. Adams, 1853
Synonyms [1]
  • PseudorotellaP. Fischer, 1857
  • Teinostoma (Annulicallus)Pilsbry & McGinty, 1945
  • Teinostoma (Ellipetylus)Pilsbry & McGinty, 1945
  • Teinostoma (Pseudorotella)P. Fischer, 1857
  • Teinostoma (Teinostoma)H. Adams & A. Adams, 1853 · alternate representation
  • TinostomaP. Fischer, 1885

Teinostoma is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Teinostomatidae. [1] [2]

Contents

This genus used to be placed within the family Skeneidae or family Tornidae(as subfamily Teinostomatinae Cossmann, 1917)

Shell description

The shells of species in this genus are usually white and glossy, are transparent when fresh, and are only a few millimeters in maximum size.

The shell is orbicular, depressed, subspiral and polished. The body whorl is rounded at the periphery. The umbilical region is covered with a large, flat callosity. The aperture is transverse, rounded, greatly produced and elongated, ending anteriorly in a slightly canaliculated point. The inner lip is smooth, callous, not emarginate or truncate anteriorly. The outer lip is thin, simple, not margined or reflected. [3]

Type species

There were two species cited along with the description of Teinostoma by H. & A. Adams (1853) but one of them, Teinostoma anomalumC. B. Adams, was nomen nudum, therefore leaving Teinostoma politumA. Adams, made available therein by a figure, as type species by monotypy. ICZN art. 67.2.1. defines "originally included nominal species" to comprise only species that have been cited in the original publication by an available name. The intended description of Teinostoma as "new genus" by A. Adams appeared only later (1855) and there T. politum is the sole included species. [1]

Species

This genus includes the following species:

Taxa inquirenda

Synonyms

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References

  1. 1 2 3 Teinostoma H. Adams & A. Adams, 1853 . Retrieved through: World Register of Marine Species  on 7 January 2019.
  2. ↑ Williams S. T., Karube S. & Ozawa T. (September 2008) "Molecular systematics of Vetigastropoda: Trochidae, Turbinidae and Trochoidea redefined". Zoologica Scripta 37(5): 483-506. doi : 10.1111/j.1463-6409.2008.00341.x
  3. ↑ Adams, H. & Adams, A. (1853-1858). The genera of Recent Mollusca; arranged according to their organization. London, van Voorst. Vol. 1: xl + 484 pp.; vol. 2: 661 pp.; vol. 3: 138 pls
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