Mauidrillia inaequalis
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| Mauidrillia inaequalis 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. inaequalis |
| Binomial name | |
| †Mauidrillia inaequalis A. W. B. Powell, 1942 | |
Mauidrillia inaequalis is an extinct species of sea snail, a marine gastropod mollusc in the family Horaiclavidae.[1] Fossils of the species date to the late Oligocene and early Miocene, and are found in South Canterbury and Otago, New Zealand.
The species has a moderately sized shell, with 7.5 whorls and a protoconch of 1.5 inflated whorls. The whorls are strongly angulate just above the middle, and the shells are deeply concave at the shoulder. The shells have broad axials and are crossed by fine, close spaced spirals. The holotype of the species measures 10 mm (0.39 in) in height and 4 mm (0.16 in) in diameter.[2]
Taxonomy
The species was first described by A.W.B. Powell in 1942.[2] The holotype was collected from Otiake, Waitaki Valley, Otago at an unknown date prior to 1943, and is held by the Auckland War Memorial Museum.[3][4]