Notadusta clifdenensis
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| Notadusta clifdenensis Temporal range: | |
|---|---|
 | |
| Holotype from the Auckland War Memorial Museum | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Superfamily: | Cypraeoidea |
| Family: | Cypraeidae |
| Genus: | †Notadusta |
| Species: | †N. clifdenensis |
| Binomial name | |
| †Notadusta clifdenensis (Cernohorsky, 1971) † | |
| Synonyms[1][2] | |
| |
Notadusta clifdenensis is an extinct species of sea snail, a marine gastropod mollusc, in the family Cypraeidae.[1] Dating to the Miocene, it is the most widespread Cypraeidae fossil in New Zealand.
In the original description, Cernohorsky described the species as follows:
Shell moderate in size, 30–37 mm (1.2–1.5 in) in length, elongate-ovate, sub-cylindrical, dorsum smooth: the labial lip margined, particularly at the extremities, and the columellar lip margined from the centre towards the anterior extremity. Aperture narrow, slightly recurved posteriorly, labial lip declivious anteriorly; the first five anterior teeth slightly produced but not reaching the margin, remainder of teeth short, columellar teeth small and confined to the aperture without extending over the columella. Posterior canal deep and well defined, columella smooth, fossula moderately broad, steep, smooth and not projecting; a single terminal ridge borders the anterior outlet, spire distinct and slightly projecting.[3]
The holotype of the species measures 37 mm (1.5 in) in length, 21 mm (0.83 in) in width, 19 mm (0.75 in) in height.[3] The spire is covered by a callus and is barely recognisable on most fossils, except due to a shallow groove at the base.[2]
It can be differentiated from N. trelissickensis due to being larger, more solid and not pyriform, and from N. victoriana due to being larger and having a steeper, smooth fossula.[3]
