Mauidrillia clavicula
| Mauidrillia clavicula Temporal range:
| |
|---|---|
| Holotype from Auckland War Memorial Museum | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Horaiclavidae |
| Genus: | Mauidrillia |
| Species: | †M. clavicula
|
| Binomial name | |
| †Mauidrillia clavicula A. W. B. Powell, 1942
| |
Mauidrillia clavicula is an extinct species of sea snail, a marine gastropod mollusc in the family Horaiclavidae.[1] Fossils of the species date to the early Miocene strata of the Mount Harris Formation at Glen Creek, Oamaru, Otago, New Zealand.
Description
The species has a small shell with a spire 1.5 times the height of the combined length of the aperture and canal. The shell has 6.5 whorls, including a protoconch of 1.5 whorls. The middle of the shell has strongly angled whorls, and the shell has weak suture cord margining. The axials appear as strongly blunt knobs at angles, and do not extend to the sutures. There are between 9-12 axials per whorl, with ten found on the penultimate whorl.[2] The holotype of the species measures 8.25 mm (0.325 in) in height and 3.1 mm (0.12 in) in diameter.[2]
Taxonomy
The species was first described by A.W.B. Powell in 1942.[2] The holotype was collected from the Target Gully Shellbed at Glen Creek, Oamaru, Otago, New Zealand at an unknown date prior to 1943, and is held by the Auckland War Memorial Museum.[3][4]
Distribution
This extinct marine species occurs in early Miocene strata of the Mount Harris Formation at Glen Creek, Oamaru, Otago, New Zealand.[3]
References
- ^ Mauidrillia clavicula A. W. B. Powell, 1942 †. 8 December 2025. Retrieved through: World Register of Marine Species.
- ^ a b c Powell, A. W. B. (1942). "The New Zealand recent and fossil Mollusca of the family Turridae, with general notes on Turrid nomenclature and systematics". Bulletin of the Auckland Institute and Museum. 2: 86. ISSN 0067-0456. OCLC 1826451. Wikidata Q115110377.
- ^ a b 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.
- ^ "Mauidrillia clavicula". Collections Online. Auckland War Memorial Museum. Retrieved 8 December 2025.
Further reading
- P. A. Maxwell. 1988. Late Miocene Deep-Water Mollusca from the Stillwater Mudstone at Greymouth, Westland, New Zealand: Paleoecology and Systematics. New Zealand Geological Survey Paleontological Bulletin 55
- Maxwell, P.A. (2009). Cenozoic Mollusca. pp. 232–254 in Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch