Results 21 to 30 of about 105 (91)

Anatomía comparada de los terópodos paravianos Unenlagiidae y sus implicancias en el origen de las aves [PDF]

open access: yes, 2023
Paraves es el clado de dinosaurios que cuenta con mayor número de especies, ya que por un lado agrupa a terópodos no-avianos extintos como Troodon y Velociraptor, y por otro lado a las aves, únicos dinosaurios vivientes (Avialae: Dinosauria, Gauthier ...
Motta, Matías Javier
core   +1 more source

A diminutive deinonychosaur (Dinosauria:Theropoda) from the Early Cretaceous of Oosh (Ovorkhangai, Mongolia)

open access: yes, 2012
We describe a new specimen of small maniraptoran theropod from the Early Cretaceous Oosh locality, Ovorkhangai province, central Mongolia. This exemplar ISMD-VP09 preserves a maxillary fragment, two teeth and partial appendicular elements.
Prieto-Marquez, Albert   +5 more
core   +1 more source

Origin and early evolution of Aves: dinosaurs, ancient birds, and mtDNA sequences

open access: yes, 1992
Recently a general cladistic framework for early avian evolution has emerged. Postcranial modifications in the wrist joint and elsewhere firmly establish birds as a diversified subgroup of maniraptoran theropods.
Paul C. Sereno
core   +1 more source

Avialan status for Oviraptorosauria [PDF]

open access: yes, 2002
Oviraptorosauria is a clade of Cretaceous theropod dinosaurs of uncertain affinities within Maniraptoriformes. All previous phylogenetic analyses placed oviraptorosaurs outside a close relationship to birds (Avialae), recognizing Dromaeosauridae or ...
Osmolska, H., Wolsan, M., Maryanska, T
core  

A Jurassic avialan dinosaur from China resolves the early phylogenetic history of birds

open access: yes, 2013
The recent discovery of small paravian theropod dinosaurs with well-preserved feathers in the Middle–Late Jurassic Tiaojishan Formation of Liaoning Province (northeastern China) has challenged the pivotal position of Archaeopteryx regarded from its ...
Escuillie, F.   +17 more
core   +1 more source

Phylogenetic relationships of Unenlagiidae theropods: are they members of Dromaeosauridae? [PDF]

open access: yes, 2010
Paraves is the theropod clade that includes Aves and their close relatives, the deinonychosaurians. The fossil record of basal paravians (currently ranging from Late Jurassic to Late Cretaceous) was mostly restricted to the Northern Hemisphere, but ...
Agnolín, Federico Lisandro   +1 more
core  

Fig. 3 in A new Jurassic scansoriopterygid and the loss of membranous wings in theropod dinosaurs

open access: yes, 2019
Fig. 3 | Phylogeny and phylomorphospace of Mesozoic coelurosaurians. a, Simplified phylogeny showing the position of Ambopteryx (see Extended Data Fig. 7 for complete results, and full names for age and stage abbreviations). Myr, million years.
O'Connor, Jingmai K.   +3 more
core   +1 more source

New specimens of Microraptor zhaoianus (Theropoda, Dromaeosauridae) from northeastern China. American Museum novitates ; no. 3381

open access: yes, 2002
44 p. : ill., map ; 26 cm.Includes bibliographical references (p. 32-33).New specimens of the diminutive theropod dinosaur Microraptor zhaoianus are described.
Norell, Mark.   +3 more
core  

Synapomorphies of Deinonychosauria and its sub-clades that are confirmed to be present in Yurgovuchia doellingi.

open access: yes, 2012
Character and state numbers are as given in Appendix S1. Unless otherwise mentioned, in each case the state is a synapomorphy of the clade under both accelerated and delayed transformation. ACCTRAN = accelerated transformation.
Natalie Toth (164443)   +4 more
core   +1 more source

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