Biotocus turbinatus
| Biotocus turbinatus | |
|---|---|
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| A drawing of a shell of Tomigerus turbinatus | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Tomogeridae |
| Genus: | †Biotocus |
| Species: | †B. turbinatus
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| Binomial name | |
| †Biotocus turbinatus (Pfeiffer, 1845)
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| Synonyms | |
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Biotocus turbinatus was a species of land snail, a gastropod in the family Tomogeridae.[2] [3]
Description
The altitude of the shell attains 10 mm, its maximum diameter 11 mm.
(Original description in Latin) The shell is chinked, compresssed-turbinate (like a flattened top), thin, and very lightly striated. It's pale horny in color and slightly shiny.
The spire is turbinate (top-shaped) and somewhat sharp. There are 5 convex whorls, with the body whorl barely equaling the spire in height. This body whorl is compressed on the side, slightly angled at the base, and ascends anteriorly, where it is constricted and pitted underneath.
The aperture is vertical, somewhat ear-shaped, and nearly closed. The peristome is widely expanded, thin, and its right margin is arched. It is armed on the inside with a strong, upper bifid (two-pronged) lamella. The basal lamella descends obliquely and is tridentate (three-toothed). The apertural wall shows 3 unequal lamellae. [4]
Distribution
This species was endemic to Brazil and is since 1996 considered extinct.[1]
References
- ^ a b Mansur, M.C.D. (1996). "Tomigerus turbinatus". IUCN Red List of Threatened Species. 1996: e.T29616A9505033. doi:10.2305/IUCN.UK.1996.RLTS.T29616A9505033.en.
- ^ Biotocus turbinatus (L. Pfeiffer, 1845). 17 August 2025. Retrieved through: World Register of Marine Species.
- ^ Breure A. S. H. & Ablett J. D. (2012) "Annotated type catalogue of the Bothriembryontidae and Odontostomidae (Mollusca, Gastropoda, Orthalicoidea) in the Natural History Museum, London". ZooKeys 182: 1-70. doi:10.3897/zookeys.182.2720.
- ^ Pfeiffer, L. (1845). "Descriptions of new species of land shells from the collection of H. Cuming, Esq". Proceedings of the Zoological Society of London. 13 (147): 45. Retrieved 17 August 2025.
This article incorporates text from this source, which is in the public domain.
- Simone, L.R.L. (2006). Land and Freshwater Molluscs of Brazil. São Paulo: Editora Gráfica Bernardi, FAPESP. pp. 1–390.
External links
- Moricand, S. (1846). "Troisième supplément au mémoire sur les coquilles terrestres et fluviatiles de la province de Bahia, envoyées par. M.J. Blanchet". Mémoires de la Société de Physique et d'Histoire naturelle de Genève. 11: 153.