Anxietas perplexa
| Anxietas perplexa | |
|---|---|
 | |
| Shell of Anxietas perplexa (holotype) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Superfamily: | Seguenzioidea |
| Family: | Seguenziidae |
| Subfamily: | Asthelysinae |
| Genus: | Anxietas |
| Species: | A. perplexa |
| Binomial name | |
| Anxietas perplexa | |
Anxietas perplexa is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.[2]
Description
The shell measures approximately 1.5 mm in height and 1 mm in breadth.
(Original description) The shell is minute and conical, with a flattened apex, rounded sides, and a flattened base. It is almost entirely unsculptured and has a somewhat quadrangular aperture with thin, sharp edges. The colour is a pale brownish yellow, with a darker line marking the sutures.
The shell contains fve whorls. The apical two form a flattened, planate protoconch, while the succeeding three descend rather rapidly but remain tightly coiled, with no umbilicus. On the base of the body whorl, just below the periphery, there are a couple of closely spaced, incised lines. Apart from these, little sculpture is present. A similar incised line occurs above the periphery, running parallel to the suture on each of the three post-nuclear whorls.
The columella is simple and erect, though slightly curved, and the aperture is oblique with thin margins. [3]
Distribution
This marine species occurs off Christmas Island.
References
- ↑ Iredale, T. 1917. More molluscan name-changes, generic and specific. Proceedings of the Malacological Society of London 12(6): 322-330
- ↑ WoRMS (2012). Anxietas perplexa Iredale, 1917. Retrieved through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=492305 on 2013-04-14
- ↑ Iredale, T. (1917). "On some new species of marine mollusca from Christmas Island, Indian Ocean". Proceedings of the Malacological Society of London. 12 (6): 334. Retrieved 21 August 2026.
This article incorporates text from this source, which is in the public domain.