From Wikipedia, the free encyclopedia
Sauropod dinosaur genus from Late Triassic Argentina
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]
It was discovered in strata dating to the
Norian
stage , around 210 million years ago.
[2]
[3] 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.
[4]
[5]
[6]
[7]
Classification
Exhibit in Singapore
A
cladogram after Pol, Garrido & Cerda, 2011,
[8] illustrates a possible placing of Lessemsaurus and
Antetonitrus in Sauropodomorpha:
In 2018, Apaldetti et al. recovered it as part of a
clade they named
Lessemsauridae , after Lessemsaurus . Their cladogram is reproduced below:
[9]
The following cladogram shows the position of Lessemsaurus outside of Sauropoda, according to Oliver W. M. Rauhut and colleagues, 2020:
[10]
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.
^ 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): e14572.
Bibcode :
2011PLoSO...614572P .
doi :
10.1371/journal.pone.0014572 .
PMC
3027623 .
PMID
21298087 .
^ Foelix, Rainer; Pabst, Ben; Kindlimann, René (2011).
"Die Saurier in Frick" (PDF) . Mitteilungen der aargauischen Naturforschenden Gesellschaft . 37 .
doi :
10.5169/seals-283430 .
^ 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 .
hdl :
11336/89332 .
PMID
29988169 .
S2CID
256705065 .
^ 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 .
^ 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): e14572.
Bibcode :
2011PLoSO...614572P .
doi :
10.1371/journal.pone.0014572 .
PMC
3027623 .
PMID
21298087 .
^ 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 .
S2CID
49669597 .
^ 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 .
S2CID
220294939 .
External links
Topics in sauropodomorph research