Turricula wanneri
| Turricula wanneri | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Superfamily: | Conoidea |
| Family: | Clavatulidae |
| Genus: | Turricula |
| Species: | T. wanneri
|
| Binomial name | |
| Turricula wanneri (K. Martin, 1914)
| |
| Synonyms[1] | |
| |
Turricula wanneri is an extinct species of sea snail, a marine gastropod mollusk in the family Clavatulidae.[1]
Taxonomy
The species was originally described as Surcula wanneri by K. Martin in 1914 from Eocene deposits of Java.[2] It was later transferred to the genus Turricula following subsequent revisions of the turrid gastropods.
Description
The shell is elongate and spindle-shaped, with the aperture occupying approximately half of the total shell length. The protoconch consists of two smooth, convex whorls that are not sharply separated from the later whorls.[2]
Early teleoconch whorls bear sharp transverse ribs which are intersected by a groove near the posterior suture, forming a row of nodules. On later whorls this groove develops into a broad depression corresponding to the sinus of the outer lip. Spiral sculpture is weak and appears mainly as fine spiral lines.[2]
In front of the depression a distinct spiral angle is formed where the ribs become nodular. Additional narrow spiral cords may occur along the sutures. The younger whorls show four to five rows of nodes elongated in the direction of the spiral.[2]
The aperture is ovate and sharply separated from the long, nearly straight siphonal canal. The inner lip is weakly developed. The outer lip, not preserved in the type material, is inferred to have had a deep rounded sinus.[2]
The shell length reaches about 14 millimetres (0.55 in).[2]
Distribution
Fossils of this species were found in the Nanggulan Formation of Java, Indonesia. The type material was collected from the Kali Puru section in the N₂ and N₃ nummulite beds of the Eocene sequence.[2]
Gallery
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Aperture view.
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Shell view.
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Spiral detail.
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Protonoch detail
References
- ^ a b "WoRMS - World Register of Marine Species - Out of scope". www.marinespecies.org. Retrieved 9 March 2026.
- ^ a b c d e f g Martin, K. (1914). "Die Fauna des Obereocäns von Nanggulan, auf Java" [The fauna of the Upper Ocean of Nangulan]. Sammlungen des Geologischen Reichs-Museums in Leiden. Neue Folge (in German). 2 (1): 118.
- Shuto, T. (1980) A note on the Eocene turrids of the Nangulan Formation, Java. In Igo, H. & Noda, H. (Eds.) Professor Saburo Kanno Memorial Volume. Institute of Geoscience, University of Tsukuba, Ibaraki, Japan, pp. 25–52, pls. 3–5.