Crassitoniella thola
| Crassitoniella thola | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Superfamily: | Cingulopsoidea |
| Family: | Eatoniellidae |
| Genus: | Crassitoniella |
| Species: | C. thola
|
| Binomial name | |
| Crassitoniella thola Ponder, 1965
| |
| Synonyms[1] | |
| |
Crassitoniella thola is a species of sea snail in the genus Crassitoniella.[2][3][4][5][6] It is endemic to New Zealand, found off the northern coast of the North Island, primarily in the waters surrounding Manawatāwhi / Three Kings Islands.
Description
In the original description, Ponder described the species as below:
Shell small, smooth, shining, with a blunt protoconch. Whorls 3½, lightly convex, false margined, thin, transparent, protoconch large, bluntly dome-shaped, smooth, not distinctly marked off; body whorl large, periphery and base rounded. Aperture large, round, peristome continuous, weakly thickened; inner lip spread over body whorl as a thin layer; columella weakly thickened, vertical; a narrow chink behind columella but no umbilicus; outer lip excavated below, dilated, bent downwards slightly posteriorly, a transparent narrow zone behind. Colour pale yellowish, a narrow white band below periphery and umbilical region. There is some variation in the height of the spire and the bluntness of the protoconch. Animal, radula and operculum unknown.[7]
The species' shells are more bluntly conical and wider than Eatoniella pallida, which has a similar appearance.[8] The shell of the holotype of the species has a height of 0.95 mm (0.037 in), and a width of 1.25 mm (0.049 in).[7]
Taxonomy
The species was first described by Winston Ponder in 1965 as Eatoniella (Albitoniella) thola, who tentatively placed the species within the subgenus Albitoniella.[7] The holotype of the species is held by the National Institute of Water and Atmospheric Research.[9] Ponder and E. K. Yoo stated that the species was likely a member of Crassitoniella in 1978.[10] The species was recombined as Crassitoniella thola in 1995.[11]
Distribution and habitat
C. thola is endemic to the waters of north of the North Island of New Zealand, primarily found around Manawatāwhi / Three Kings Islands. Some members have been found in the Bay of Plenty, and off the eastern coast of East Cape.[7][12]
References
- ^ "WoRMS - World Register of Marine Species - Crassitoniella thola (Ponder, 1965)". marinespecies.org. Retrieved 2 August 2023.
- ^ Australia, Atlas of Living. "Species: Crassitoniella thola (Gastropod)". bie.ala.org.au. Retrieved 2 August 2023.
- ^ "ADW: Crassitoniella thola: CLASSIFICATION". animaldiversity.org. Retrieved 2 August 2023.
- ^ "Crassitoniella thola (Ponder, 1965)". www.gbif.org. Retrieved 2 August 2023.
- ^ "Collections Online - Museum of New Zealand Te Papa Tongarewa". collections.tepapa.govt.nz. Retrieved 2 August 2023.
- ^ "Schemes including Crassitoniella thola · iNaturalist". iNaturalist. Retrieved 2 August 2023.
- ^ a b c d Ponder, W. F. (1965). "The Family Eatoniellidae in New Zealand". Records of the Auckland Institute and Museum. 6: 47–99. ISSN 0067-0464. JSTOR 42906115. Wikidata Q58676802.
- ^ Powell, A.W.B. (1979). New Zealand Mollusca: Marine, Land and Freshwater Shells. Auckland: Collins. p. 90. ISBN 0002169061.
- ^ Blom, Wilma M. (2025). "Annotated Catalogue of Fossil and Extant Molluscan Types in the Auckland War Memorial Museum". Bulletin of the Auckland Museum. 22. doi:10.32912/BULLETIN/22. ISSN 1176-3213. OCLC 1550165130. Wikidata Q135397912.
- ^ Ponder, Winston F.; Yoo, E. K. (1978). "A revision of the Eatoniellidae of Australia (Mollusca, Gastropoda, Littorinacea)". Records of the Australian Museum. 31 (15): 606–658. doi:10.3853/J.0067-1975.31.1978.206. ISSN 0067-1975. Wikidata Q92172879.
- ^ Spencer, H. G.; Willan, R. C. (1995). "The marine fauna of New Zealand: Index to the fauna. 3. Mollusca" (PDF). New Zealand Oceanographic Institute Memoir. 105: 1–125. ISSN 0083-7903. Wikidata Q66411987.
- ^ "NZ Mollusca - Crassitoniella thola". www.mollusca.co.nz. Retrieved 2 August 2023.
Further reading
- Powell, A.W.B. 1979 New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p. 90)
- Spencer, H.G., Marshall, B.A. & Willan, R.C. (2009). Checklist of New Zealand living Mollusca. pp 196–219. in: Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch.