Teleochilus duplicatus

Teleochilus duplicatus Temporal range: middle 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:	Raphitomidae
Genus:	Teleochilus
Species:	†T. duplicatus
Binomial name
†Teleochilus duplicatus Powell, 1944

Teleochilus duplicatus is an extinct species of sea snail, a marine gastropod mollusc in the family Raphitomidae. ^[1] Fossils of the species date to the middle Miocene, and have been found in strata of the Port Phillip Basin of Victoria.

Description

Reverse view of holotype

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

Shell of moderate size, ovate-biconic. Aperture almost two-thirds height of shell. Whorls strongly convex, greatest convexity just above the middle. Protoconch sculptured with six strong, rounded spiral cords. Post-nuclear whorls with five pairs of strong, flat-topped spiral cords, one pair submargining suture and separated from the remaining four by a moderately deep, narrow sulcus. On the body-whorl there are eleven pairs of cords and nine single cords on the anterior end. Each pair of cords is linear-spaced, but the interspaces between the pairs are half the width of a cord or more, There is no axial sculpture. ^[2]

The holotype of the species measures 14.1 mm (0.56 in) in height and 5.1 mm (0.20 in) in diameter. ^[2]

Taxonomy

The species was first described by A.W.B. Powell in 1944. ^[2] The holotype was collected from Grice's Creek (also known as Gunyoung Creek) near Mornington, 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 middle Miocene, and occurs in the strata of the Port Phillip Basin of Victoria, Australia, including the Gellibrand Formation. ^{[3] [5]}

References

1. Teleochilus duplicatus A. W. B. Powell, 1944 † . 13 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. Wikidata   Q135397912.
4. "Teleochilus duplicatus". Collections Online. Auckland War Memorial Museum . Retrieved 13 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.