Iliosuchus
| Iliosuchus Temporal range:Bathonian
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| Drawing of BMNH R83 | |
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| Photograph of BMNH R83 | |
Scientific classification
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Clade: | Orionides |
| Clade: | Avetheropoda |
| Clade: | Coelurosauria |
| Genus: | †Iliosuchus Huene,1932 |
| Type species | |
| Iliosuchus incognitus Huene, 1932
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| Synonyms | |
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Iliosuchus(meaning "crocodile hipped" ) is agenusoftheropoddinosaurknown fromBathonian–age (168.3 – 166.1mya) rocks ofEngland.It was perhaps 2 metres (6.6 ft) long.[1]
History
[edit]The only known fossils of this genus are threeilia(BMNHR83, OUM J29780 and OUM J28971) from theStonesfield Slate,Oxfordshire,England.From theholotypeBMNH R83, which was discovered in 1880,[2]Friedrich von Huenedescribed and named the only species,I. incognitus,in 1932.[3]The generic name is derived from the ilium and GreekSouchos,the crocodile god. Thespecific namemeans "unknown" inLatin.Another species,I. clevelandi,was proposed in 1976 byPeter Galton,[4]who assignedStokesosaurus clevelanditoIliosuchus,but this has found no acceptance among other researchers;[5]in 1980 Galton himself withdrew his opinion.[6]
Description
[edit]TheIliosuchusilia, very small with a length of nine to ten centimetres, have a vertical supra–acetabularridge on the surface, similar totyrannosauridsand many other predatory dinosaurs belonging to the groupTetanurae,includingPiatnitzkysaurusandMegalosaurus.[7]Such fragmentary and incomplete material is inadequate for accurate classification; nonetheless,Iliosuchushas sometimes been considered a tyrannosaurid ancestor. This is unlikely to be correct as the bones cannot be distinguished from small individuals ofMegalosaurus,a megalosaurid. Whatever the case,Iliosuchusis not diagnostic and is thereforedubious.[7]IfIliosuchus incognitusis a tyrannosauroid, it would be a possibleancestortoProceratosaurus,the earliest recognized tyrannosauroid, and would be the earliest of the tyrannosauroids.
See also
[edit]References
[edit]- ^Holtz, Thomas R. Jr. (2008)Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All AgesSupplementary Information
- ^Lomax, D. & Tamura, N. (2014). "Dinosaurs of the British Isles",Siri Scientific Presspg. 162ISBN9780957453050
- ^F. v. Huene (1932). "Die fossile Reptil-Ordnung Saurischia, ihre Entwicklung und Geschichte",Monographien zur Geologie und Palaeontologie, serie 14(1-2): 1-361
- ^P. M. Galton, (1976), "Iliosuchus,a Jurassic dinosaur from Oxfordshire and Utah ",Palaeontology19(3): 587-589
- ^Benson, R.B.J. (2008). "New information onStokesosaurus,a tyrannosauroid (Dinosauria: Theropoda) from North America and the United Kingdom ".Journal of Vertebrate Paleontology.28(3): 732–750.doi:10.1671/0272-4634(2008)28[732:NIOSAT]2.0.CO;2.S2CID129921557.
- ^Galton, P.M.; Powell, H.P. (1980). "The ornithischian dinosaurCamptosaurus prestwichiifrom the Upper Jurassic of England ".Palaeontology.23:411–443.
- ^abBenson, R.B.J. (2009). "An assessment of variability in theropod dinosaur remains from the Bathonian (Middle Jurassic) of Stonesfield and New Park Quarry, UK and taxonomic implications forMegalosaurus bucklandiiandIliosuchus incognitus."Palaeontology52 857-877,[1]
