Lessemsaurus

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Lessemsaurus
Temporal range: Norian
~228–208.5 Ma
Lessemsaurus Senckenberg.jpg
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: Saurischia
Suborder: Sauropodomorpha
Clade: Sauropoda
Clade: Lessemsauridae
Genus: Lessemsaurus
Bonaparte 1999
Species:
L. sauropoides
Binomial name
Lessemsaurus sauropoides
Bonaparte 1999

Lessemsaurus is an extinct genus of sauropod dinosaur belonging to Lessemsauridae.

Naming and description

Exhibit in Singapore

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]


Sauropodiformes

Mussaurus

Aardonyx

Sefapanosaurus

Melanorosauridae

Camelotia

Melanorosaurus

Sauropoda
Lessemsauridae

Antetonitrus

Ingentia

Lessemsaurus

Blikanasaurus

Gongxianosaurus

Pulanesaura

Gravisauria

References

  1. ^ 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.
  2. ^ Bonaparte, J. F. (1999). "Evolución de las vértebras presacras en Sauropodomorpha". Ameghiniana. 36: 115–187.
  3. ^ 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.
  4. ^ Apaldetti; Martínez, Ricardo N.; Cerda, Ignatio A.; Pol, Diego; Alcober, Oscar (2018). "An early trend towards gigantism in Triassic sauropodomorph dinosaurs". Nature Ecology & Evolution. doi:10.1038/s41559-018-0599-y.

External links

  • Media related to Lessemsaurus at Wikimedia Commons


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