Alaginella valida
| Alaginella valida | |
|---|---|
| |
| Shell of Alaginella valida (holotype) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Marginellidae |
| Genus: | Alaginella |
| Species: | A. valida
|
| Binomial name | |
| Alaginella valida (R. B. Watson, 1886)
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| Synonyms | |
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Alaginella valida is a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails.[1]
Description
[edit]The length of the shell attains 6 mm.
(Original description) Shell: small, gibbously biconical, and strong, with a lustrous, porcellanous white surface. It has a long, oblique, rather narrow aperture, a strongly varixed outer lip with faint teeth, and four folds on the columella.
Sculpture: the shell features faint and unequal lines of growth.
Color: lustrous, porcellanous white.
Spire: moderately raised and conical, with an excessively blunt and rounded apex.
Whorls: nearly five whorls, slightly convex above, bluntly rounded at the periphery, produced, and barely concave at the base. The suture is slightly impressed.
Aperture: long, narrow, and oblique, with a truncate front. The outer lip is not emarginate in front, though it is truncate. It ascends at the insertion, forming a wide, shallow sinus, and is convex in the middle. The outer lip has a strong varix and a blunt, rounded edge with faint denticles. The inner lip is not thickened, nearly straight but oblique to the axis. The lower half of its length is occupied by four broad but not very prominent oblique denticles, with the foremost forming a slight flange at the tip of the columella. [2]
Distribution
[edit]This marine species is endemic to Australia and occurs off Queensland. [3]
References
[edit]- ^ Alaginella valida (R. B. Watson, 1886). 17 July 2024. Retrieved through: World Register of Marine Species.
- ^ Watson, R.B. (1886). Report on the Scaphopoda and Gasteropoda collected by H.M.S. Challenger during the years 1873-76. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873–76. Zoology 15 (part 42). pp. 1–756.
This article incorporates text from this source, which is in the public domain.
- ^ "Alaginella valida". Australian Faunal Directory. Australian Government. Retrieved 16 July 2024.
- Cossignani, T. (2006). Marginellidae & Cystiscidae of the World. L'Informatore Piceno. pp. 1–408.
- Wilson, B. (1994). Australian marine shells, Prosobranch, Gastropods (2 ed.). Kallaroo, Western Australia: Odyssey Publishing. pp. 1–370.
