The various species of Dapedium ranged from 9 to 40 centimetres (3.5 to 15.7 in) long, and all had an oval to near-circular body. The skin was covered with thick, rhomboid, ganoid (enamel-like) scales. The smallest species so far found is D. noricum.
The skull was armoured with bony dermal plates, which were especially plentiful in the orbital region. These bones bore irregular tubercles. The small pectoral and pelvic fins, along with the extended dorsal and anal fins formed a functional unit with the tail.[3] The tail was short and stout, providing the power for a sudden change in direction while the fish was swimming.
Dapedium pholidotum from Louis Agassiz collection at the Musée d'histoire naturelle de Neuchâtel
The upper jaw of Dapedium was moveable and could protrude from the mouth, enabling a wider gape to capture larger prey.
The strong and pointed dentition suggests that Dapedium was durophagous, feeding on hard-shelled invertebrates, like mussels and sea urchins.[3]
Referencesedit
^Roberts, George (1839). An etymological and explanatory dictionary of the terms and language of geology. London: Longman, Orme, Brown, Green, & Longmans. p. 45. Retrieved 31 December 2021.
^Detlev Thies; Jens Waschkewitz (2016). "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. 14 (4): 339–364. doi:10.1080/14772019.2015.1043361. S2CID 130282395.
^ abPalmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 37. ISBN1-84028-152-9.
Detlev THIES & Annette HERZOG, New information on †Dapedium LEACH 1822 (Actinopterygii, †Semionotiformes), in Mesozoic Fishes 2 – Systematics and Fossil Record, G. Arratia & H.-P. Schultze (eds.): pp. 143-152, Verlag Dr. Friedrich Pfeil, München, Germany – ISBN3-931516-48-2
dapedium, from, greek, δαπέδων, dapédon, pavement, extinct, genus, primitive, neopterygian, finned, fish, first, described, finding, example, politum, found, lower, lias, lyme, regis, jurassic, coast, england, leach, 1822, lived, late, triassic, jurassic, peri. Dapedium from Greek dapedwn dapedon pavement 1 is an extinct genus of primitive neopterygian ray finned fish The first described finding was an example of D politum found in the Lower Lias of Lyme Regis on the Jurassic Coast of England Leach 1822 Dapedium lived in the late Triassic and Jurassic periods 2 DapediumTemporal range Late Triassic Middle Jurassic PreꞒ Ꞓ O S D C P T J K Pg NScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass ActinopterygiiOrder DapediiformesFamily DapediidaeGenus DapediumLeach 1822Species D ballei D caelatum D granulatum D noricum D pholidotum D politum D punctatum Contents 1 Appearance 2 Distribution 3 Behaviour 4 ReferencesAppearance editThe various species of Dapedium ranged from 9 to 40 centimetres 3 5 to 15 7 in long and all had an oval to near circular body The skin was covered with thick rhomboid ganoid enamel like scales The smallest species so far found is D noricum nbsp Dapedium politum specimen from Oxford University Museum of Natural HistoryThe skull was armoured with bony dermal plates which were especially plentiful in the orbital region These bones bore irregular tubercles The small pectoral and pelvic fins along with the extended dorsal and anal fins formed a functional unit with the tail 3 The tail was short and stout providing the power for a sudden change in direction while the fish was swimming nbsp Dapedium pholidotum from Louis Agassiz collection at the Musee d histoire naturelle de NeuchatelThe upper jaw of Dapedium was moveable and could protrude from the mouth enabling a wider gape to capture larger prey Distribution edit nbsp D pholidotum at the American Museum of Natural History Dapedium lived mostly in the Jurassic seas of Europe a peripheral continental shelf sea of the Tethys Ocean Notable finds have been made in Holzmaden Germany in Temple Grafton Warwickshire England and in Lyme Regis Dorset England Behaviour editThe strong and pointed dentition suggests that Dapedium was durophagous feeding on hard shelled invertebrates like mussels and sea urchins 3 References edit Roberts George 1839 An etymological and explanatory dictionary of the terms and language of geology London Longman Orme Brown Green amp Longmans p 45 Retrieved 31 December 2021 Detlev Thies Jens Waschkewitz 2016 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 14 4 339 364 doi 10 1080 14772019 2015 1043361 S2CID 130282395 a b Palmer D ed 1999 The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals London Marshall Editions p 37 ISBN 1 84028 152 9 Detlev THIES amp Annette HERZOG New information on Dapedium LEACH 1822 Actinopterygii Semionotiformes in Mesozoic Fishes 2 Systematics and Fossil Record G Arratia amp H P Schultze eds pp 143 152 Verlag Dr Friedrich Pfeil Munchen Germany ISBN 3 931516 48 2 nbsp Paleontology portal nbsp Fish portal nbsp This article about a Triassic fish is a stub You can help Wikipedia by expanding it vte nbsp This article related to a Jurassic fish is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Dapedium amp oldid 1167548726, wikipedia, wiki, book, books, library,
