Pycnonemosaurus

Pycnonemosaurus
Temporal range: Late Cretaceous, 70 Ma
↓
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Dinosauria
Order: Saurischia
Suborder: Theropoda
Family: †Abelisauridae
Genus: †Pycnonemosaurus
Kellner & Campos, 2002
Species: †P. nevesi
Binomial name
Pycnonemosaurus nevesi
Kellner & Campos, 2002
Synonyms
  • Pycnoneosaurus nevesi Paul, 2010 lapsus calami

Pycnonemosaurus (meaning 'thick forest lizard') is a genus of carnivorous theropod dinosaur that belonged to the family Abelisauridae. It was found in the Upper Cretaceous Bauru-type red conglomerate sandstone, Mato Grosso, Brazil, and it lived about 70 million years ago during the Late Cretaceous (Maastrichtian stage). Initial size estimations put this animal at 7 metres (23 ft) in length,[1] but later analyses have found that it was likely larger, being approximately 8.9 metres (29 ft) long.[2] This new size estimate currently makes Pycnonemosaurus the largest formally described member of the Abelisauridae thus far.[3]

Thus far, the remains of Pycnonemosaurus have been fragmentary: five incomplete teeth, parts of seven caudal vertebrae, the distal part of a right pubis, a right tibia, and the distal articulation of the right fibula. The small pubic foot and hatchet-shaped cnemial crest of the tibia distinguish this species within the abelisaurs. The type species, Pycnonemosaurus nevesi, was formally described by Kellner and Campos in 2002.[1][4]

See also

References

  1. 1 2 Paul, G.S. (2010). Princeton Field Guide to Dinosaurs. Princeton University Press. p. 79.
  2. ↑ Grillo, O. N.; Delcourt, R. (2016). "Allometry and body length of abelisauroid theropods: Pycnonemosaurus nevesi is the new king". Cretaceous Research. doi:10.1016/j.cretres.2016.09.001.
  3. ↑ http://www.eartharchives.org/articles/brazilian-dinosaur-was-king-of-the-abelisaurs/
  4. ↑ Kellner, A.W.A.; Campos, D.A. (2002). "On a theropod dinosaur (Abelisauria) from the continental Cretaceous of Brazil.". Arquivos do Museu Nacional Rio de Janeiro. 60 (3): 163–170.
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