Splendrillia formosa
| Splendrillia formosa Temporal range:
| |
|---|---|
| File:Splendrillia formosa MA71121-a.jpg | |
| Holotype from Auckland War Memorial Museum | |
| Scientific classification Edit this classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Drilliidae |
| Genus: | Splendrillia |
| Species: | †S. formosa
|
| Binomial name | |
| †Splendrillia formosa A. W. B. Powell, 1944
| |
Splendrillia formosa is an extinct species of sea snail, a marine gastropod mollusc in the family Drilliidae.[1] Fossils of the species date to the middle Miocene, and occur in the strata of the Otway Basin of Victoria, Australia.
Description
[edit | edit source]
In the original description, Powell described the species as follows:
Shell small, slender, tall-spired, sculptured with narrowly-rounded, very oblique axials, 10-11 per whorl, obsolescent on last whorl. Surface covered with incised spirals, 12 on spire-whorls and about 26 on body-whorl, base, and neck. From the middle of the base to the anterior end the spirals become increasingly deeper and wider-spaced, cutting the surface into quite strong rounded cords. Subsutural fold weak, narrow, and flattened. Shoulder very steep, broad, and very shallow, scarcely indenting the lightly convex whorl outlines. Aperture narrow; parietal callus-pad heavy; posterior sinus deep, subtubular.[2]
The holotype of the species measures 10.5 mm (0.41 in) in height and 3.9 mm (0.15 in) in diameter.[2] The species' developed spiral sculpture resembles Iredalea exilis, but can be distinguished due to lacking a keeled protoconch.[3]
Taxonomy
[edit | edit source]The species was first described by A.W.B. Powell in 1944.[2] The holotype was collected from Clifton Bank, Hamilton, Victoria, at an unknown date prior to 1944, and is held by the Auckland War Memorial Museum.[4][5]
Distribution
[edit | edit source]This extinct marine species dates to the middle Miocene, and occurs in the strata of the Otway Basin of Victoria, Australia, known from the Muddy Creek Formation.[4][6]
References
[edit | edit source]- ^ Splendrillia formosa A. W. B. Powell, 1944 †. 24 November 2025. Retrieved through: World Register of Marine Species.
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