Callawayasaurus
Callawayasaurus Temporal range: Early Cretaceous, Aptian
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Skull of Callawayasaurus colombiensis displayed in the | |
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Superorder: | †Sauropterygia |
Order: | †Plesiosauria |
Family: | †Elasmosauridae |
Genus: | †Callawayasaurus Carpenter, 1999 |
Species: | †C. colombiensis
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Binomial name | |
†Callawayasaurus colombiensis (Wells, 1962 [originally Alzadasaurus])
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Synonyms | |
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Callawayasaurus is a genus of plesiosaur from the family Elasmosauridae. When the first Callawayasaurus fossil was first discovered by Samuel Paul Welles in 1962, it was described as Alzadasaurus colombiensis before being moved into its current genus by Kenneth Carpenter in 1999.[1]
Etymology[]
Callawayasaurus is named in honor of the paleontologist , editor of Ancient Marine Reptiles who, as Carpenter put it, "in his brief career as a vertebrate paleontologist, did much to improve our understanding of marine reptiles."[1] The familiar suffix, -saurus comes from the Greek sauros (σαυρος), meaning "lizard" or "reptile."[2]
Description[]
The first skull of Callawayasaurus to be found was 35 centimetres (14 in; 1.15 ft) long,[3] while the animal as a whole grew up to 8 metres (26 ft) long. The nares of Callawayasaurus are elongated and positioned over the maxilla, which has 3-5 teeth.[2] The neck contains 56 vertebrae which are relatively short compared to other elasmosaurids.[2] Callawayasaurus fossils have no ; in common with other plesiosaurs such as Terminonatator. They also lack postaxial accessory facets.[4]
Another nearly complete skeleton was found to be slightly more robust than the holotype specimen. This subtle change may indicate sexual dimorphism.[2]
Distribution[]
The first Callawayasaurus remains were found in the Paja Formation near Leiva, Boyaca Colombia.[2] The species name for the type, "columbiensis", means "from Colombia".[2] Callawayasaurus are known from the Aptian faunal stage of the early Cretaceous period, which extended from 125 to 112 million years ago.[5]
See also[]
- List of plesiosaur genera
- Timeline of plesiosaur research
References[]
- ^ Jump up to: a b Carpenter, K. 1999. "Revision of North American elasmosaurs from the Cretaceous of the Western Interior". Paludicola 2(2):148-173.
- ^ Jump up to: a b c d e f "ppne.co.uk entry on Callawayasaurus". Archived from the original on 2011-07-28. Retrieved 2008-03-06.
- ^ "oceansofkansas.com entry on Callawayasaurus". Retrieved 2008-03-08.
- ^ Patrick S. Druckenmiller and Anthony P. Russell., "A new Elasmosaurid Plesiosaur (Reptilia: Sauropterygia) from the lower Cretaceous Clearwater Formation, Northeastern Alberta, Canada". Vertebrate Morphology Research Group, Department of Biological Sciences, University of Calgary
- ^ "stratigraphy.org entry on Apitan stage". Archived from the original on 2008-02-09. Retrieved 2008-03-06.
External links[]
- Elasmosaurids
- Early Cretaceous plesiosaurs
- Early Cretaceous reptiles of South America
- Plesiosaurs of South America
- Cretaceous Colombia
- Fossils of Colombia
- Altiplano Cundiboyacense
- Paja Formation
- Fossil taxa described in 1999
- Taxa named by Kenneth Carpenter
- Sauropterygian genera