Ethminolia

Ethminolia
shells of Ethminolia vitiliginea
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Family: Trochidae
Genus: Ethminolia
Iredale, 1924
Type species
Ethminolia probabilis
Iredale, 1924
Synonyms

Umbonium (Ethminolia) Iredale, 1924 superseded rank

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

General characteristics

The shell is small (diameter usually less than 10 mm) and appreciably wider than high. The whorls are rounded and often shouldered, and the sculpture consists of spiral lirae or cords accompanied by microscopic axial threads. The umbilicus is broad, its rim rounded and not thickened, and it lacks any internal funicle. The outer lip is simple, and the interior is nacreous without inrunning ridges.

The operculum is corneous and multispiral, with a well‑developed peripheral fringe that is radially striate; these striations remain visible on the earlier whorls, and spiral microsculpture is present.

The radula has thin base‑plates on the rachidian and lateral teeth that narrow anteriorly, with the outer edge rounded, raised anteriorly, and somewhat twisted; the fifth lateral tooth is scarcely evident. The inner marginal tooth is transitional, with a reduced cusp. The cusps of the inner marginal teeth are short and broad, with cusps 2–10 the largest and coarsely dentate; the central denticle is asymmetrical and somewhat broader than the others, and additional narrower denticles are present on both margins. The ctenidium remains unknown.

Distribution

This marine genus occurs in the Red Sea, Gulf of Oman, the Arabian Sea and off Australia (New South Wales, South Australia, Victoria, Western Australia) and Tasmania.

Species

Species within the genus Ethminolia include:

Species brought into synonymy

References

  1. ↑ Iredale, 1924, Proceedings of the Linnean Society of New South Wales, 49(3): 182, 228
  2. ↑ Ethminolia Iredale, 1924. Retrieved through: World Register of Marine Species on 18 May 2011.
  3. ↑ Herbert, D.G. (2024). "The Umboniinae (Mollusca: Gastropoda: Trochidae) of New Caledonia, with descriptions of two new genera and eight new species, plus an additional new species from the Bismarck Sea". European Journal of Taxonomy. 973: 100.Public Domain This article incorporates text from this source, which is under a CC BY 4.0 license.
  4. ↑ Ethminolia akuana Raines, 2007. Retrieved through: World Register of Marine Species on 1 May 2010.
  5. ↑ Ethminolia doriae (Caramagna, 1888). Retrieved through: World Register of Marine Species on 1 May 2010.
  6. ↑ Ethminolia elveri Cotton & Godfrey, 1938. Retrieved through: World Register of Marine Species on 1 May 2010.
  7. ↑ Ethminolia hemprichi Issel, 1869. Retrieved through: World Register of Marine Species on 1 May 2010.
  8. ↑ Ethminolia hornungi (Bisacchi, 1931). Retrieved through: World Register of Marine Species on 1 May 2010.
  9. ↑ Ethminolia iridifulgens (Melvill, 1910). Retrieved through: World Register of Marine Species on 1 May 2010.
  10. ↑ Ethminolia probabilis Iredale, 1924. Retrieved through: World Register of Marine Species on 1 May 2010.
  11. ↑ Ethminolia vitiliginea (Menke, 1843). Retrieved through: World Register of Marine Species on 1 May 2010.
  12. ↑ Ethminolia nektonica (Okutani, 1961). Retrieved through: World Register of Marine Species on 1 May 2010.
  13. ↑ Ethminolia stearnsii (Pilsbry, 1895). Retrieved through: World Register of Marine Species on 1 May 2010.