Splendrillia formosa
| Splendrillia formosa Temporal range:
| |
|---|---|
| Holotype from Auckland War Memorial Museum | |
| Scientific 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
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
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
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
- ^ Splendrillia formosa A. W. B. Powell, 1944 †. 24 November 2025. Retrieved through: World Register of Marine Species.
- ^ a b c Powell, A. W. B. (1944). "The Australian Tertiary Mollusca of the Family Turridae". Records of the Auckland Institute and Museum. 3: 3–68. ISSN 0067-0464. JSTOR 42905993. Wikidata Q58676624.
- ^ dei Musei, Via; Selmi, Via (2005). "Notes on fossil turrids 1 (Mollusca: Gastropoda). Elaeocyma dertonensis, new name for Drillia exilis Bellardi, 1877 not Pease, 1868". Bollettino malacologico. 41 (5–8): 13-16.
- ^ 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.
- ^ "Splendrillia formosa". Collections Online. Auckland War Memorial Museum. Retrieved 24 November 2025.
- ^ Darragh, Thomas A. (August 2024). "A checklist of Australian marine Cenozoic Mollusca". Memoirs of Museum Victoria. 83: 37–206. doi:10.24199/J.MMV.2024.83.02. ISSN 1447-2546. Wikidata Q136396722.