Pycnonemosaurus

Pycnonemosaurus
Temporal range: Late Cretaceous, 70 Ma
↓
Reconstructed head in the National Museum of Brazil
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Clade:Dinosauria
Order:Saurischia
Suborder:Theropoda
Family:†Abelisauridae
Clade:†Furileusauria
Genus:†Pycnonemosaurus
Kellner & Campos, 2002
Species: †P. nevesi
Binomial name
Pycnonemosaurus nevesi
Kellner & Campos, 2002
Synonyms
  • Pycnoneosaurus nevesi Paul, 2010 lapsus calami

Pycnonemosaurus (meaning 'dense 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 sandstones of the Adamantina Formation, 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 about 8.9 metres (29.2 ft) long.[2] This new size estimate currently makes Pycnonemosaurus the largest formally described member of the Abelisauridae thus far.[3]

Fossil remains

Size comparison of Pycnonemosaurus (middle, medium grey) with other related carnotaurins

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]

  • Restoration of the head

See also

References

  1. 1 2 Paul, G.S., 2010., The 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. ↑ 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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