Talopena masoni
| Talopena masoni | |
|---|---|
 | |
| Shell of Talopena masoni (holotype) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Trochidae |
| Genus: | Talopena |
| Species: | T. masoni |
| Binomial name | |
| Talopena masoni (G. Nevill & H. Nevill, 1874) | |
| Synonyms[1] | |
| |
Talopena masoni is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.[1]
Description
[edit]The length of the shell attains 11 mm, its diameter 16 mm.
(Original description) The shell in form resembles Monilea callifera Lamarck, 1822 but is more depressed. The six whorls are closely and sharply spirally keeled, with alternate keels larger, and the surface is very closely and obliquely decussated both on the ridges and in the interstices, whereas in M. callifera the decussation affects only the ridges. The shell is flesh-coloured or white, the upper surface being radiately striped at wide intervals with reddish brown, these stripes being partly continued onto the base and the whole shell being irregularly and closely mottled with brown.
The base is closely ribbed, the ribs being scabrously decussated. A broad, raised callosity encircles the open umbilicus, this callous rib being very closely and regularly convexly striated. The columellar margin is very thick and callous and is much contorted. The interior of the aperture is only faintly striated, and the nacre is very thick and highly lustrous.[2]
The shell of T. masoni is less elevated (H/D <0.70) than Talopena maestratii.It has very unequal spiral cords (of two or three orders) on the spire whorls and has a distinct narrow groove at the outer edge of the peri-umbilical band.[3]
Distribution
[edit]This marine species occurs off the Andaman Islands.
References
[edit]- 1 2 MolluscaBase eds. (2026). MolluscaBase. Talopena masoni (G. Nevill & H. Nevill, 1874). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1783432 on 2026-06-06
- ↑ Nevill, G.; Nevill, H. (1874). "Descriptions of new marine Mollusca from the Indian Ocean". Journal of the Asiatic Society of Bengal. 43 (2): 28. Retrieved 23 June 2026.
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This article incorporates text from this source, which is in the public domain. - ↑ 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: 71.
This article incorporates text from this source, which is under a CC BY 4.0 license.
- Patterson Edward, J. K.; Ravinesh, R. & Biju Kumar, A. (2022). Molluscs of the Gulf of Mannar, India and adjacent waters: A fully illustrated guide. Suganthi Devadason Marien Research Institute & Department of Aquatic Biology and Fisheries, University of Kerala. Tuticorin. i–xx, 1–524