Asiatosaurus

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Asiatosaurus
Temporal range: Early Cretaceous, 122–112 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Asiatosaurus tooth.gif
Holotype tooth of A. mongolensis (AMNH 6264) seen from three different angles
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: †Sauropodomorpha
Clade: †Sauropoda
Genus: †Asiatosaurus
Osborn, 1924
Type species
†Asiatosaurus mongolensis
Osborn, 1924
Other species
  • †A. kwangshiensis Hou, Yeh & Zhao, 1975
Synonyms
  • Asiatosaurus mongolicus (lapsus calami)

Asiatosaurus (meaning "Asian lizard") is an extinct genus of herbivorous sauropod dinosaur which lived during the Early Cretaceous in Mongolia and China.[1] The type species is known only from teeth, making it difficult to rely on information until more specimens are found to expand our knowledge, and another species is known, also based on scant remains; both are now classified as nomina dubia..

The type species, A. mongolensis, was described by Osborn, in 1924, based on AMNH 6264, a broken tooth from the Öösh Formation of Övörkhangai Province, Mongolia.[2] It was the first sauropod genus named from East-Asia. In 2020, Molina-Perez and Larramendi estimated A. mongoliensis to be 31 metres (101.7 ft) in length and 45 metric tons (49.6 short tons) in weight, with a total height of 17.5 metres (57.4 ft), making it one of the tallest known dinosaurs.[3]

A. kwangshiensis, the second species, was described by Hou, Yeh and Zhao, in 1975 based on IVPP V4794, a tooth, three cervical vertebrae and multiple ribs from the Xinlong Formation of Guangxi, China and another dubious specimen hails from the Lura Formation. The genus was classified within Brachiosauridae by Hou et al.,[4] but is now believed to be a basal sauropod like A. mongolensis.

References[]

  1. ^ P. Upchurch, P. M. Barrett, and P. Dodson. (2004). Sauropoda. In D. B. Weishampel, H. Osmolska, and P. Dodson (eds.), The Dinosauria (2nd edition). University of California Press, Berkeley 259-322 [M. Carrano/M. Carrano/M. Carrano]
  2. ^ Osborn, H.F. (1924). "Sauropoda and Theropoda from the Lower Cretaceous of Mongolia". American Museum Novitates. 128: 1–7.
  3. ^ Molina-Perez & Larramendi (2020). Dinosaur Facts and Figures: The Sauropods and Other Sauropodomorphs. New Jersey: Princeton University Press. pp. 55 & 262.
  4. ^ Hou, L.H.; Yeh, H.K.; Zhao, X.J. (1975). "Fossil reptiles from Fusui, Kwangshi" (PDF). Vertebrata PalAsiatica. 13 (1): 24–33.


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