Biology:Lessemsaurus
Lessemsaurus is an extinct genus of sauropodiform dinosaur that lived in the Norian-aged (Upper Triassic) Los Colorados Formation of what is now Argentina.
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]
It is part of the La Esquina faunal assemblage,[2][3] dating to the mid-Norian stage, around 213 million years ago.[4] It is estimated to have reached 10–12 metres (33–39 ft) long and weighed over 7 metric tons (7.7 short tons), possibly up to 8–10 metric tons (8.8–11.0 short tons), in maximum body mass.[5][6][7][8]
Classification
A cladogram after Pol, Garrido & Cerda, 2011,[9] illustrates a possible placing of Lessemsaurus and Antetonitrus in Sauropodomorpha:
| Sauropodomorpha |
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
In 2018, Apaldetti et al. recovered it as part of a clade they named Lessemsauridae, after Lessemsaurus. Their cladogram is reproduced below:[10]
| Sauropodiformes |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
The following cladogram shows the position of Lessemsaurus outside of Sauropoda, according to Oliver W. M. Rauhut and colleagues, 2020:[11]
| Massopoda |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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. http://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/2480.
- ↑ 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. https://www.researchgate.net/publication/230213248.
- ↑ Kent, Dennis V.; Olsen, Paul E.; Rasmussen, Cornelia; Lepre, Christopher; Mundil, Roland; Irmis, Randall B.; Gehrels, George E.; Giesler, Dominique et al. (2018-06-12). "Empirical evidence for stability of the 405-kiloyear Jupiter–Venus eccentricity cycle over hundreds of millions of years". Proceedings of the National Academy of Sciences 115 (24): 6153–6158. doi:10.1073/pnas.1800891115. PMID 29735684. PMC 6004457. https://www.pnas.org/doi/abs/10.1073/pnas.1800891115.
- ↑ Diego Pol; Alberto Garrido; Ignacio A. Cerda (2011). "A New Sauropodomorph Dinosaur from the Early Jurassic of Patagonia and the Origin and Evolution of the Sauropod-type Sacrum". PLOS ONE 6 (1). doi:10.1371/journal.pone.0014572. PMID 21298087. Bibcode: 2011PLoSO...614572P.
- ↑ Foelix, Rainer; Pabst, Ben; Kindlimann, René (2011). "Die Saurier in Frick". Mitteilungen der aargauischen Naturforschenden Gesellschaft 37. doi:10.5169/seals-283430. https://doc.rero.ch/record/232631/files/PAL_E4501.pdf.
- ↑ Apaldetti, C.; Martínez, R.N.; Cerda, I.A.; Pol, D.; Alcober, O. (2018). "An early trend towards gigantism in Triassic sauropodomorph dinosaurs". Nature Ecology & Evolution 2 (8): 1227–1232. doi:10.1038/s41559-018-0599-y. PMID 29988169. Bibcode: 2018NatEE...2.1227A.
- ↑ McPhee, Blair W.; Benson, Roger B.J.; Botha-Brink, Jennifer; Bordy, Emese M.; Choiniere, Jonah N. (2018). "A giant dinosaur from the earliest Jurassic of South Africa and the transition to quadrupedality in early sauropodomorphs". Current Biology 28 (19): 3143–3151.e7. doi:10.1016/j.cub.2018.07.063. PMID 30270189. Bibcode: 2018CBio...28E3143M. https://ora.ox.ac.uk/objects/uuid:70de4052-c736-4737-a4d7-6ef8ab2b21b0/files/m8e3f7c7b635474911e65e3da30edadac.
- ↑ Diego Pol; Alberto Garrido; Ignacio A. Cerda (2011). "A New Sauropodomorph Dinosaur from the Early Jurassic of Patagonia and the Origin and Evolution of the Sauropod-type Sacrum". PLOS ONE 6 (1). doi:10.1371/journal.pone.0014572. PMID 21298087. Bibcode: 2011PLoSO...614572P.
- ↑ 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. PMID 29988169. Bibcode: 2018NatEE...2.1227A.
- ↑ Rauhut, O. W. M.; Holwerda, F. M.; Furrer, H. (2020). "A derived sauropodiform dinosaur and other sauropodomorph material from the Late Triassic of Canton Schaffhausen, Switzerland". Swiss Journal of Geosciences 113 (1): 8. doi:10.1186/s00015-020-00360-8. https://dspace.library.uu.nl/bitstream/handle/1874/408535/Rauhut2020_Article_ADerivedSauropodiformDinosaurA.pdf?sequence=1&isAllowed=y.
External links
Wikidata ☰ Q135039 entry
 |  |
