Austrotoma janjukiensis
| Austrotoma janjukiensis Temporal range:
| |
|---|---|
| Holotype from Auckland War Memorial Museum | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Pseudomelatomidae |
| Genus: | Austrotoma |
| Species: | †A. janjukiensis
|
| Binomial name | |
| †Austrotoma janjukiensis A. W. B. Powell, 1944
| |
| Synonyms[1] | |
| |
Austrotoma janjukiensis is an extinct species of sea snail, a marine gastropod mollusc, in the family Pseudomelatomidae.[2] Fossils of the species date to the early Miocene strata of the Port Phillip Basin of Victoria, Australia.
Description
In the original description, Powell described the species as follows:
Species similar to inexpectata, but without axial folds on the spire. The primary spirals are heavier, more broadly rounded, with a threadin each interspace over most of the base. In inexpectata the spirals are obsolescent on the upper half of the base. There is a moderate subsutural fold. Spire-whorls with 8 spaced, spiral threads on the shoulder, 5 strong rounded cords from shoulder angle to lower suture and about 14 primary cords on the body-whorl. Spiral threads, one per interspace over the upper half of the base, increasing to three below, and finally crowding the neck just above the fasciole. The spire is not much less than the height of the aperture.[3]
The holotype of the species has a height of 26.5 mm (1.04 in), and a diameter of 12.1 mm (0.48 in).[3]
Taxonomy
The species was first described by A. W. B. Powell in 1944.[3] The holotype was collected prior to 1944 from Torquay, Victoria, Australia. It is a part of the H. J. Finlay Collection, which is held by the Auckland War Memorial Museum.[4][5]
Distribution
This extinct marine species occurs in early Miocene strata of the Port Phillip Basin of Victoria, Australia, including the Puebla Formation.[4][1]
References
- ^ a b 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.
- ^ Austrotoma janjukiensis A. W. B. Powell, 1944 †. Retrieved through: World Register of Marine Species on 2 March 2026.
- ^ 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. This article incorporates text from this source, which is under a CC BY 4.0 license.
- ^ 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.
- ^ "Austrotoma janjukiensis". Collections Online. Auckland War Memorial Museum. Retrieved 2 March 2026.