Osteology and relationships of a new theropod dinosaur from the Middle Jurassic of Patagonia

Abstract

A new taxon of theropod dinosaur is described as Condorraptor currumili gen. et sp. nov., from the Middle Jurassic (Callovian) Cañadó n Asfalto Formation of Chubut Province, Argentinean Patagonia. The taxon is represented by a single fragmentary postcranial skeleton. Although incompletely known, Condorraptor is the second most complete theropod from the Middle Jurassic of Gondwana. The new taxon is characterized by the absence of a posterior incision between the fibular condyle and the medial side of the proximal articular end of the tibia, the pleurocoels in the anterior cervicals being situated posteroventral to the parapophyses, and the presence of a pronounced 'step' between the distal articular facet and shaft of Mt IV. Pneumatic features of the vertebral column show strong variation between the left and right side. Condorraptor gen. nov. can be referred to the Tetanurae and is a representative of a global radiation of basal tetanurans in the Early to Mid Jurassic.

Theropod teeth from the Middle-Upper Jurassic Shishugou Formation of northwest Xinjiang, China

“…0.6). The preserved crowns of this taxon are strongly elongated (CHR almost 2.5), and do not display any interdenticular sulci between mesial and distal denticles (Rauhut 2005). There are 14 denticles per 5 mm on the distal carina, at mid-crown, in Condorraptor, and 11 to 15 in Piatnitzkysaurus (CH personal observations).…”

Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain

“…Also as in Majungasaurus, the intercondylar notch is represented by a groove that runs from the intercondylar area and is medially directed in proximal view to the proximal articular surface (Fig. 11C, E), as in Carcharodontosauridae (Sereno 1999), the coelurosaur Tugulusaurus (Rauhut and Xu 2005) and the ceratosaurian Masiakasaurus (Rauhut 2005a). This groove is also present in the medial condyle of Majungasaurus.…”

The Late Triassic dinosauromorph Sacisaurus agudoensis (Caturrita Formation; Rio Grande do Sul, Brazil): anatomy and affinities

“…Recent studies have employed an apomorphybased approach as a surrogate for association (e.g. Irmis et al 2007a;Nesbitt et al 2010;Kammerer et al 2012), which is also safer in specific taphonomic contexts (Rauhut 2005;Martinez & Alcober 2009). As for the dinosauromorph remains found in the bone accumulation dealt with here, the ilia and femora are the only duplicated elements with notable variations.…”