Spinosaurus
| Spinosaurus | |
|---|---|
 Spinosaurus illustration. | |
| Videnskabelig klassifikation | |
| Rige | Animalia (Dyr) |
| Række | Chordata (Chordater) |
| Klasse | Sauropsida (Krybdyr) |
| Overorden | Dinosauria (Dinosaurus) |
| Orden | Saurischia |
| Familie | Spinosaurida |
| Slægt | Spinosaurus Stromer, 1915 |
| Hjælp til læsning af taksobokse | |
Spinosaurus var en dinosaur i slægten Spinosaurus, og levede for ca. 100 millioner år siden i kridttiden. Nogle forskere mener at den levede af store fisk som Onchopristis.
Spinosaurus optræder bl.a. i filmen Jurassic Park III (2001).
Udseende
Spinosaurus var muligvis den største kødædende dinosaurer nogensinde, fordi undersøgelser publiceret i hh. 2005 og 2007 antyder, at den kan have været 12 til 18 meter lang og have vejet op til mellem 7 og 20 ton. Den havde massive kløer, som den brugte til at flænse byttet med. [1][2]
Spinosaurus kan genkendes ved, at den har et krokodillelignende gab, hvor kraniet kunne blive op til 1,75 meter langt, mens den på ryggen bar en form for sejl, hvilket nok var det mest iøjnefaldende træk, som kunne blive op til ca. 2 meter højt.
Rester
Der er blevet fundet knoglerester flere steder i Nordafrika, hvor den menes at have levet. Grunden til, at denne dinosaurus kun menes at have været den største kødædende dinosaur, skyldes, at der kun er fundet ganske få knogler, som man kan gætte og måle ud fra.
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Kilder
- ^ Dal Sasso, C. (2005). "New information on the skull of the enigmatic theropod Spinosaurus, with remarks on its sizes and affinities" (PDF). Journal of Vertebrate Paleontology. 25 (4): 888-896. doi:10.1671/0272-4634(2005)025[0888:NIOTSO]2.0.CO;2. Arkiveret fra originalen (PDF) 29. april 2011. Hentet 23. april 2011.
{{cite journal}}: Ukendt parameter|coauthors=ignoreret (|author=foreslået) (hjælp) - ^ Therrien, F. (2007). "My theropod is bigger than yours...or not: estimating body size from skull length in theropods". Journal of Vertebrate Paleontology. 27 (1): 108-115. doi:10.1671/0272-4634(2007)27[108:MTIBTY]2.0.CO;2.
{{cite journal}}: Ukendt parameter|coauthors=ignoreret (|author=foreslået) (hjælp)
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Spinosaurus skull restoration,
- • Based on the 2005 Del Sasso reconstruction. Which in turn is based on specimins MSNM V4047 (a 998 mm snoat), IPHG 1912 VIII 19 (the front half of the lower jaw), and UCPC-2 (the crest). Rear parts of the skull based on Irritator and other spinosaurs.[1]
- • • Skin is not yet known for Spinosaurus. However, other large theropods with skin impressions have, until recently, shown typical dinosaurian scales. (Encyclopedia of Dinosaurs 1997 Philip J. Currie, Kevin Padian) The skin details in this image are speculative but have been based loosely on what is known in Carnotaurus[2]. In 2011 Sciurumimus was described which shows a fuzzy body covering, some analysis have found it to be a magalosauroid, the same group that Spinosaurus belongs to. [3]. In 2012 Yutyrannus was described, it showed that large theropods could have been covered in feathers [4]. Other recent discoveries have suggested that the origin of feathers are further back in the dinosaur family tree and may even predate dinosaurs. These discoveries suggest that it is entirely possible that Spinosaurus could have also have feathers covering its body.
- • The colours and/or patterns, as with nearly all reconstructions of prehistoric creatures, are speculative.
NOTE: I often update my images. If you want to have any of my images on a website, please (if possible) don’t host/save it to the website server. I’d prefer it if the image's Wikimedia URL is used. This means that if I update an image, it will be updated on the site as well. Thanks.
References
- ↑ dal Sasso, C.; Maganuco, S.; Buffetaut, E.; and Mendez, M.A. (2005). "New information on the skull of the enigmatic theropod Spinosaurus, with remarks on its sizes and affinities". Journal of Vertebrate Paleontology 25 (4): 888–896. DOI:[0888:NIOTSO2.0.CO;2 10.1671/0272-4634(2005)025[0888:NIOTSO]2.0.CO;2].
- ↑ Bonaparte, José F.; Novas, Fernando E.; Coria, Rodolfo A. (1990). "Carnotaurus sastrei Bonaparte, the horned, lightly built carnosaur from the Middle Cretaceous of Patagonia". Contributions in Science 416. Natural History Museum of Los Angeles County.
- ↑ Rauhut, O.W.M.; Foth, C.; Tischlinger, H.; and Norell, M.A. (2011). "doi=10.1073 Exceptionally preserved juvenile megalosauroid theropod dinosaur with filamentous integument from the Late Jurassic of Germany". Proceedings of the National Academy of Sciences 109 (29): 11746–11751.
- ↑ (2012). "A gigantic feathered dinosaur from the Lower Cretaceous of China" (PDF). Nature 484: 92–95. DOI:10.1038/nature10906. PMID 22481363.
Forfatter/Opretter: Didier Descouens, Licens: CC BY-SA 4.0
Spinosaurus aegyptiacus; Morroco; Private collection
Stage: Albian-Cenomanian (112-93 Ma)
Size: 8,40 m