Eomesodon
| Eomesodon Temporal range: Early Jurassic
Potential Late Triassic, Middle Jurassic, and Early Cretaceous records
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|---|---|
| Scientific classification Edit this classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | †Pycnodontiformes |
| Genus: | †Eomesodon Woodward, 1918 |
| Type species | |
| †Pycnodus liassicus Egerton, 1854
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| Other species | |
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?See text | |
Eomesodon (Greek for "dawn Mesodon", Mesodon being a now-disused pycnodont genus) is an extinct genus of prehistoric marine pycnodont fish.[1] [2]
It contains only a single definitive species, E. liassicus (Egerton, 1854) from the Early Jurassic (Hettangian to Sinemurian) of England (Lower Lias), France, and Belgium (Marnes de Jamoigne Formation). The specimen from England is known from a nearly complete skeleton.[2] [3] E. liassicus is the only known species of pycnodont known from the earliest Jurassic Europe following the Triassic-Jurassic extinction event, and the group does not see further diversification in Europe until the Toarcian.[4]
In addition to E. liassicus, several other disputed species are known from earlier (Late Triassic) and much later (up to the earliest Cretaceous). However, the status of these species and their placement within Eomesodon is disputed, and later studies refer to them as "Eomesodon". If the Triassic species actually did belong to this genus, then Eomesodon would be the only pycnodont known from both sides of the Triassic-Jurassic boundary.
The following disputed species are known:[5]
- "E." barnesi (Woodward, 1906) - latest Jurassic (Tithonian)/earliest Cretaceous (Berriasian) of England (Purbeck Group). Nearly complete specimen known.
- "E." depressus Woodward, 1916 - Tithonian/Berriasian of England (Purbeck Group)
- "E." hoeferi (Gorjanovic-Kramberger, 1905) - Late Triassic (middle Norian) of Austria (Seefelder Formation). Many small, complete specimens known.[6] [7]
- "E." granulatus (Münster, 1846) - Oxfordian (Corallian Group) to Kimmeridgian of England and potentially France
- "E." rugulosus (Agassiz, 1839) - middle Jurassic (Bathonian) of England (Taynton Limestone Formation) and France (Great Oolite Group)
Some studies have found it to be potentially related to the Triassic genus Brembodus , while others have found it to be more basal.[8]
See also
[edit ]References
[edit ]- ^ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 364: 560. Archived from the original on 2011年07月23日. Retrieved 2009年02月27日.
- ^ a b Woodward, Arthur Smith (1895). Catalogue of the Fossil Fishes in the British Museum (Natural History). Taylor & Francis.
- ^ "PBDB Taxon". paleobiodb.org. Retrieved 2025年01月10日.
- ^ Stumpf, Sebastian; Ansorge, Jörg; Pfaff, Cathrin; Kriwet, Jürgen (2017年07月04日). "Early Jurassic diversification of pycnodontiform fishes (Actinopterygii, Neopterygii) after the end-Triassic extinction event: evidence from a new genus and species, Grimmenodon aureum". Journal of Vertebrate Paleontology. 37 (4): e1344679. Bibcode:2017JVPal..37E4679S. doi:10.1080/02724634.2017.1344679. ISSN 0272-4634. PMC 5646184 . PMID 29170576.
- ^ Palaeontographical Society. Palaeontographical Society. 1918.
- ^ "PBDB Taxon". paleobiodb.org. Retrieved 2025年01月10日.
- ^ Hornung, Thomas; Kogan, Ilja; Moosleitner, Gero; Wolf, Gerhard; van der Wielen, Joop (2019年12月01日). "The Norian fish deposits of Wiestal („Seefeld Member", Northern Calcareous Alps, Salzburg, Austria) – taxonomy and palaeoenvironmental implications". Austrian Journal of Earth Sciences. 112 (2): 125–165. doi:10.17738/ajes.2019.0008 . ISSN 2072-7151.
- ^ Poyato-Ariza, Francisco; Wenz, Sylvie (January 2002). "A new insight into pycnodontiform fishes". Geodiversitas. Retrieved 10 November 2023.
This article about a prehistoric ray-finned fish is a stub. You can help Wikipedia by expanding it.
- Pycnodontiformes genera
- Prehistoric ray-finned fish stubs
- Triassic fish stubs
- Early Jurassic fish
- Hettangian genus first appearances
- Sinemurian genus extinctions
- Fossils of England
- Fossils of France
- Fossils of Belgium
- Jurassic fish of Europe
- Fossil taxa described in 1916
- Taxa named by Arthur Smith Woodward