Trigonellites
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T. latus redirects here. For the dinosaur, see Torosaurus.
| Trigonellites Temporal range: Late Jurassic, ~
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| 1895 drawing of an aptychi of T. latus | |
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| Genus: | †Trigonellites Parkinson, 1811
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| Type species | |
| †Trigonellites latus Parkinson, 1811
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| Other species | |
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Trigonellites is an extinct genus of Late Jurassic ammonite, known from three species, discovered in an outcrop of the Kimmeridge Clay Formation in Ely, England.[2] It was originally classified as a bivalve,[1] but it has since been classed as an ammonite species. Only two species once placed in the genus are still considered valid today: T. latus and T. curvirostris, with one dubious species, T. simplex, possibly being a species of Lyrodon.[1]
The genus name Trigonellites was originally proposed for some calcareous plates found in Cretaceous oolitic rocks , but these have since been declassed as indeterminate ammonites. The name has since been used to represent three species of Late Jurassic (c.156-151 Ma) ammonites.[1]
References
- ^ a b c d G. A. Goldfuss. 1863. Abbildungen und Beschreibungen der Petrefacten Deutschlands und der angrenzenden Länder. Divisio Quarta: Molluscorum acephalicorum reliquiae. Muschelthiere der Vorwelt. 1. Bivalvia. Petrefacta Germaniae 4(1):1-273 [A. Dunhill/B. Allen]
- ^ J. Prestwich. 1879. On the discovery of a species of Iguanodon in the Kimmeridge Clay near Oxford; and a notice of a very fossiliferous band of the Shotover Sands. Geological Magazine, new series, decade 2 6(5):193-195 [M. Carrano/M. Carrano]
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