Biology:Etrema mirabilis
| Etrema mirabilis | |
|---|---|
| File:Etrema mirabilis MA70969-a.jpg | |
| Holotype from Auckland War Memorial Museum | |
Scientific classification 
| |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Clathurellidae |
| Genus: | Etrema |
| Species: | †E. mirabilis
|
| Binomial name | |
| †Etrema mirabilis A. W. B. Powell, 1944
| |
Etrema mirabilis is an extinct species of sea snail, a marine gastropod mollusc, in the family Pseudomelatomidae.[1] Fossils of the species date to late Miocene strata of the Gippsland Basin of Victoria, Australia.
Description
In the original description, Powell described the species as follows:
Large, differing from all other species of Etrema in the total absence of axials, concave, inwardly inclined shoulder and erect, papillate, smooth protoconch of 21⁄4 whorls without a keel. Spiral sculpture of broad, flattened cords separated by narrow, shallow interspaces, 8 on penultimate, 23 on body-whorl. A thread in each interspace over the median area of body-whorl. Sinus deep, subtubular. Parietal tubercle strong. Outer lip thin and crenulated at edge, strengthened behind by a heavy varix, and within by a narrow ridge.[2]
The holotype of the species measures 17.5 mm (0.69 in) in length and has a diameter of 7.6 mm (0.30 in).[2] It can be distinguished from E. gippslandensis due to the slight angulation on the last whorl of the shell.[2]
Taxonomy
The species was first described by A. W. B. Powell in 1944 as Pseudoinquisitor trinervis.[2] The holotype was collected by farmer Christopher Ritchie, likely from the Mississippi Creek near Lakes Entrance in Victoria, Australia at an unknown date prior to 1937. A part of the Finlay Collection held by the Auckland War Memorial Museum, H. J. Finlay had stolen the specimen from the National Museum of Victoria's Dennant Collection, which had been on loan to F. A. Singleton.[3][4]
Distribution
This extinct marine species occurs in late Miocene strata of the Gippsland Basin of Victoria, Australia, including the Jemmys Point Formation.[3][5]
Gallery
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Reverse view of holotype
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Side view of holotype
References
- ↑ Etrema mirabilis (A. W. B. Powell, 1944) †. Retrieved through: World Register of Marine Species on 18 December 2025.
- ↑ 2.0 2.1 2.2 2.3 , Wikidata Q58676624 Template:Source-attribution-CC BY 4.0
- ↑ 3.0 3.1 , Wikidata Q135397912
- ↑ "Etrema mirabilis". Auckland War Memorial Museum. https://www.aucklandmuseum.com/discover/collections/record/237297.
- ↑ , Wikidata Q136396722
Wikidata ☰ Q137437755 entry
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