Scrinium duplicatum

Scrinium duplicatum Temporal range: early Miocene PreꞒ Ꞓ O S D C P T J K Pg N
Holotype from Auckland War Memorial Museum
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Family:	Mitromorphidae
Genus:	Scrinium
Species:	†S. duplicatum
Binomial name
†Scrinium duplicatum A. W. B. Powell, 1944

Scrinium duplicatum is an extinct species of sea snail, a marine gastropod mollusc in the family Mitromorphidae. ^[1] Fossils of the species date to the early Miocene, and occur in the strata of the Port Phillip Basin of Victoria, Australia.

Description

Reverse view of holotype

In the original description, Powell described the species as follows:

Resembles [ Scrinium haroldi ], but slightly larger, more robust, with a depressed. dome-shaped protoconch, medially angulate whorls, and a moderately strong subsutural fold bearing two linear-spaced spiral cords. Whorls 6, including protoconch. Axials heavy, broadly rounded, not extended over base, 8-10 per whorl (8 on penultimate, in holotype). Spiral sculpture of regular linear-spaced cords, 14 on the penultimate (including two on subsutural fold), and about 38 on body-whorl and base. ^[2]

The holotype of the species measures 10 mm (0.39 in) in height and 4.5 mm (0.18 in) in diameter. ^[2]

Taxonomy

The species was first described by A.W.B. Powell in 1944. ^[2] The holotype was collected from Torquay, Victoria, at an unknown date prior to 1944, and is held by the Auckland War Memorial Museum. ^{[3] [4]}

Distribution

This extinct marine species dates to the early Miocene, and occurs in the strata of the Port Phillip Basin of Victoria, Australia, known from the Puebla Formation. ^{[3] [5]}

References

1. Scrinium duplicatum A. W. B. Powell, 1944 † . 24 November 2025. Retrieved through: World Register of Marine Species .
2. 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.
3. 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.
4. "Scrinium duplicatum". Collections Online. Auckland War Memorial Museum . Retrieved 24 November 2025.
5. 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.