Pycnonemosaurus

  • Mato Grosso, Brazil ( Adamantina Formation)
  • Pycnonemosaurus Nevesi

Pycnonemosaurus is a little known theropod dinosaur genus from the group of Abelisauridae. The fragmentary remains of discovery so far only come from the Upper Cretaceous ( Turonian to Santonian ) of Brazil. It is the first formally designated both as well as to the currently best known in Brazilian territory discovered Abelisauriden. The relationships within the Abelisauridae can not be determined because of the very incomplete discovery. This genus was described in 2002 by Alexander Kellner and Diógenes de Almeida Campos with the only kind Pycnonemosaurus Nevesi scientifically.

Discovery

The Fund ( holotype, specimen number DGM 859- R) consists of five teeth, fragments of seven caudal vertebrae, pubis ( pubic ), shinbone ( tibia ) and the fragment of a fibula ( fibula ). He was found on the land of the Roncador Farm in Mato Grosso. The fossils come from a conglomeratic sandstone, which is today credited the Adamantina formation, a formation of the Bauru Group.

Features

Pycnonemosaurus was probably a powerfully built Abelisauride what the short and robust, 84.5 cm long shin points, similar to the Indian Lametasaurus. As with other Abelisauriden the ends of the diapophyses (lateral spinous processes ) of the caudal vertebrae are fan-shaped. The pubic bone is long, slender and in side view straight. Unlike other Abelisauriden, the lower end of this bone on the anterolateral side on a serving as muscle attachment point lead.

Documents

Mya (unit) Adamantina-Formation Species Vertebral arch Digital Object Identifier
665853
de