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Pectoral Girdle Morphology in Early-Diverging Paravians and Living Ratites: Implications for the Origin of Flight
(American Museum of Natural History, 2020-08)
Discussions about the origin of flight almost unanimously assume that early birds positioned (and moved) their wings in the same basic manner as living flying birds, with reconstructed wings extended with the airfoil surface ...
Tail anatomy of Buitreraptor gonzalezorum (Theropoda, Unenlagiidae) and comparisons with other basal paravians
(Academic Press Ltd - Elsevier Science Ltd, 2017-09)
Tail anatomy of unenlagiid theropods remains poorly known. The most complete and informative taxon of this family is Buitreraptor gonzalezorum from the Upper Cretaceous of Rio Negro province, Argentina. The aim of the ...
New theropod dinosaur from the Upper Cretaceous of Patagonia sheds light on the paravian radiation in Gondwana
(Springer, 2020-06)
The fossil record of basal paravians in Gondwana is still poorly known, being limited to the Cretaceous unenlagiids from South America and the problematic Rahonavis from Madagascar. Here we report on a new paravian from ...
Comments on the morphology of basal paravian shoulder girdle: New data based on unenlagiid Theropods and Paleognath birds
(Frontiers Media, 2021-05)
In 1976 John Ostrom published an enlightening paper about the anatomical transformations in the shoulder girdle and forelimb elements along the origin of birds. Most of his ideas were based on comparing Archaeopteryx ...
Paravian phylogeny and the dinosaur-bird transition: An overview
(Frontiers Media S.A., 2019-02)
Recent years witnessed the discovery of a great diversity of early birds as well as closely related non-avian theropods, which modified previous conceptions about the origin of birds and their flight. We here present a ...
Archaeopteryx, paravian phylogenetic analyses, and the use of probability-based methods for palaeontological datasets
(Taylor & Francis, 2013-05)
Archaeopteryx, which has often been considered the earliest avialan, is an iconic species, central to our understanding of bird origins. However, a recent parsimony-based phylogenetic study shifted its position from within ...
Potential for Powered Flight Neared by Most Close Avialan Relatives, but Few Crossed Its Thresholds
(Cell Press, 2020-10)
Uncertainties in the phylogeny of birds (Avialae) and their closest relatives have impeded deeper understanding of early theropod flight. To help address this, we produced an updated evolutionary hypothesis through an ...
Postcranial osteology of a new specimen of Buitreraptor gonzalezorum (Theropoda, Unenlagiidae)
(Elsevier, 2017-06)
Buitreraptor gonzalezorum is a theropod dinosaur belonging to the clade Unenlagiidae. It is known by several specimens coming from the Upper Cretaceous of Northwestern Patagonia, Argentina. In spite of its completeness, ...