Argalista nana
| Argalista nana | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Colloniidae |
| Subfamily: | Colloniinae |
| Genus: | Argalista |
| Species: | A. nana
|
| Binomial name | |
| Argalista nana Finlay, 1930[1]
| |
Argalista nana is a species of small sea snail with calcareous opercula, a marine gastropod mollusk in the family Colloniidae. [2] [3][4]
Description
A. nana reaches a width of 2.5mm and a height of 0.9mm.
(Original description) The shell is very similar to Argalista fluctuata in general appearance, but it is uniformly smaller when adult.
The spiral grooves are the same in arrangement, but they are considerably finer. A rather wide band round the umbilicus is free from spiral grooves in A. fluctuata; in A. nana, this band is much narrower, with the spirals continuing almost up to the perforation.
Perhaps the best distinguishing character is the umbilicus, which in A. nana, is much smaller and almost filled up, appearing much as in Uberella vitrea (Hutton). The colour pattern is much the same as in A. fluctuata. [5]
Distribution
This marine species is endemic to New Zealand. It is found from Three Kings Island to Northland.[6][7][8]
References
- ^ Finlay H.J. (1930) Additions to the Recent fauna of New Zealand. No. 3. Transactions and Proceedings of the Royal Society of New Zealand 61: 222-247. (Published 23 August 1930). World Register of Marine Species, Retrieved 2013-02-10.
- ^ Argalista nana Finlay, 1930. 23 October 2025. Retrieved through: World Register of Marine Species.
- ^ Finlay, H. 1930. Additions to the Recent fauna of New Zealand. No. 3, Transactions of the New Zealand Institute, 61 (p.223).
- ^ Powell, A.W.B. "New Zealand mollusca : marine, land, and freshwater shells". natlib.govt.nz. Retrieved 2025-01-29.
- ^ Finlay, H.J. (1930). "Additions to the Recent fauna of New Zealand. No. 3". Additions to the Recent fauna of New Zealand. No. 3. 61: 223. Retrieved 23 October 2025. This article incorporates text from this source, which is in the public domain.
- ^ "NZ Mollusca - Argalista nana". www.mollusca.co.nz. Retrieved 2025-01-29.
- ^ Blom, Wilma M. (2019-12-10). "Fossil and Recent molluscan types in the Auckland War Memorial Museum. Part 3: Gastropoda (Patellogastropoda and Vetigastropoda)". Records of the Auckland Museum. 54: 37–62. doi:10.32912/ram.2018.54.3. ISSN 1174-9202.
- ^ Morley, Margaret S.; Hayward, Bruce W. (2009). "Marine Mollusca of Great Barrier Island, New Zealand". Records of the Auckland Museum. 46: 15–51. ISSN 1174-9202.
- Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (
External links