Dapediidae
| Dapediidae | ||||||||||||
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Dapedium caclatus |
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| Temporal occurrence | ||||||||||||
| Upper Triassic to Upper Jura | ||||||||||||
| Locations | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the order | ||||||||||||
| Dapediiformes | ||||||||||||
| Thies & Waschkewitz , 2015 | ||||||||||||
| Scientific name of the family | ||||||||||||
| Dapediidae | ||||||||||||
| Lehmann , 1966 |
The Dapediidae are an extinct family of bony fish (Osteichthyes). They lived in the sea and in freshwater from the Middle Triassic to the Upper Jurassic .
features
The fish were usually medium-sized with a maximum length of 45 cm. They are high back and strongly flattened on the sides, in some species the head and trunk are almost circular, others are highly spindle-shaped. The back and anal fin were long. A row of infraorbitalia and a row of suborbitalia together formed the bones of the eye ring. The vertical section of the preoperculars was partially covered by the suborbitalia. A gular plate was available.
Systematics
The Dapediidae family was introduced in 1966 by the German paleontologist Ulrich Lehmann and assigned to the Semionotiformes . In 2015, Thiesa and Waschkewitz introduced the monotypical order Dapediiformes for the family and assigned it to the gingymodes (kinship of the pike ) within the subclass of the bone organoids (Holostei). Other scientists place them in the Halecomorphi (relationship of the bald pike ) or see the Dapediidae as the sister group of a clade of Ginglymodi and Halecomorphi.
Genera
- Dapedium Leach, 1822 , Upper Triassic of Europe
- Paradapedium Jain, 1973 , Lower Triassic of India
- Hemicalypterus Schaeffer, 1967 , Upper Triassic of North America
- Sargodon Plieninger, 1847 , Upper Triassic of Europe
- Heterostrophus Wagner, 1863 , Upper Jurassic of Europe
- Tetragonolepis Bronn, 1830 , Lower Jurassic of Europe and India
Dapedium pholidotum
Heterostrophus latus
Sargodon tomicus
Tetragonolepis semicinctus
literature
- Detlev Thies & Jens Waschkewitz: Redescription of Dapedium pholidotum (Agassiz, 1832) (Actinopterygii, Neopterygii) from the Lower Jurassic Posidonia Shale, with comments on the phylogenetic position of Dapedium Leach, 1822. Journal of Systematic Palaeontology, Volume 14, Issue 4, 2016, DOI: 10.1080 / 14772019.2015.1043361
- Joseph S. Nelson , Terry C. Grande, Mark VH Wilson: Fishes of the World. John Wiley & Sons, 2016, ISBN 978-1118342336 .
