Lessemsaurus
| Lessemsaurus Temporal range: Norian
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | †Sauropodomorpha |
| Clade: | †Sauropoda |
| Clade: | †Lessemsauridae |
| Genus: | †Lessemsaurus Bonaparte 1999 |
| Species: | †L. sauropoides
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| Binomial name | |
| †Lessemsaurus sauropoides Bonaparte 1999
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Lessemsaurus is an extinct genus of sauropod dinosaur belonging to Lessemsauridae.
Naming and description
The type species, L. sauropoides, was formally described by José Fernando Bonaparte in 1999 in honor of Don Lessem, a writer of popular science books. It was found in the Los Colorados Formation of the Ischigualasto-Villa Unión Basin in La Rioja Province, Argentina.[1]
This dinosaur was around 9 metres (30 ft) long and was discovered in strata dating to the Norian stage, around 210 million years ago.[2][3]
Classification
In 2018, Apaldetti et al. recovered it as part of a clade they named Lessemsauridae, after Lessemsaurus. Their cladogram is reproduced below:[4]
References
- ^ Weishampel, David B; et al., 2004. "Dinosaur distribution (Late Triassic, South America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 527–528. ISBN 0-520-24209-2.
- ^ Bonaparte, J. F. (1999). "Evolución de las vértebras presacras en Sauropodomorpha". Ameghiniana. 36: 115–187.
- ^ Pol, D.; Powell, J. E. (2007). "New information on Lessemsaurus sauropoides (Dinosauria: Sauropodomorpha) from the Upper Triassic of Argentina". Special Papers in Palaeontology. 77: 223–243.
- ^ Apaldetti; Martínez, Ricardo N.; Cerda, Ignatio A.; Pol, Diego; Alcober, Oscar (2018). "An early trend towards gigantism in Triassic sauropodomorph dinosaurs". Nature Ecology & Evolution. 2 (8): 1227–1232. doi:10.1038/s41559-018-0599-y. hdl:11336/89332. PMID 29988169.
External links
Media related to Lessemsaurus at Wikimedia Commons
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