New theropod dinosaur from the Upper Cretaceous of Patagonia sheds light on the paravian radiation in Gondwana

@article{Motta2020NewTD,
  title={New theropod dinosaur from the Upper Cretaceous of Patagonia sheds light on the paravian radiation in Gondwana},
  author={Mat{\'i}as J. Motta and Federico L. Agnolin and Federico Briss{\'o}n Egli and Fernando Emilio Novas},
  journal={The Science of Nature},
  year={2020},
  volume={107},
  pages={1-8}
}
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 the Cenomanian-Turonian (Late Cretaceous) of Río Negro province, NW Patagonia, Argentina. The new taxon exhibits a derived bird-like morphology of the forelimbs (e.g., robust ulna with prominent, anteriorly oriented, and proximally saddle-shaped radial cotyle and wide medial… Expand
Megaraptorid (Theropoda: Tetanurae) Partial Skeletons from the Upper Cretaceous Bajo Barreal Formation of Central Patagonia, Argentina: Implications for the Evolution of Large Body Size in Gondwanan MegaraptoranS
ABSTRACT We describe two partial postcranial skeletons belonging to the enigmatic theropod dinosaur clade Megaraptoridae from the Upper Cretaceous (lower Cenomanian–upper Turonian) Bajo BarrealExpand
Testing the persistence of Carcharodontosauridae (THEROPODA) in the upper cretaceous of Patagonia based on dental evidence
Abstract The deposits corresponding to the Upper Cretaceous Neuquen and San Jorge Gulf basins from northern and central Patagonia have provided two of the most complete sequences of terrestrialExpand
Pennaraptoran Theropod Dinosaurs Past Progress and New Frontiers
Osteology of Unenlagia comahuensis (Theropoda, Paraves, Unenlagiidae) from the Late Cretaceous of Patagonia
TLDR
Detailed analysis of Unenlagia anatomy resulted in the recognition of one possible additional Unenlagiidae synapomorphy (i.e., the presence of cup‐like iliac articulation on ischium), lending support to the interpretation that unen lagiids are stem‐Avialae. Expand
Chapter 2 The fossil record of Mesozoic and Paleocene pennaraptorans
An unabated surge of new and important discoveries continues to transform knowledge of pennaraptoran biology and evolution amassed over the last 150+ years. This chapter summarizes progress made thusExpand
Comments on the Morphology of Basal Paravian Shoulder Girdle: New Data Based on Unenlagiid Theropods and Paleognath Birds
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 onExpand
Histology and pneumaticity of Aoniraptor libertatem (Dinosauria, Theropoda), an enigmatic mid‐sized megaraptoran from Patagonia
TLDR
A detailed analysis of pneumaticity of the sacrum and tail of Aoniraptor shows a complex structure within these vertebrae, being composed by small diverticulae surrounding large pNEumatic canals and a central chamber that opens outside through pleurocoels or pnematic canals. Expand

References

SHOWING 1-10 OF 76 REFERENCES
An Unusual New Theropod with a Didactyl Manus from the Upper Cretaceous of Patagonia, Argentina
TLDR
A new, partially articulated mid-sized theropod was found in rocks from the Huincul Formation and represents the first likely neovenatorid from this unit, the most basal tetatanuran to exhibit common patterns of digit III reduction that evolved independently in a number of other tetanuran lineages. Expand
A bizarre Cretaceous theropod dinosaur from Patagonia and the evolution of Gondwanan dromaeosaurids
TLDR
The new discovery amplifies the range of morphological disparity among unenlagiines, demonstrating that by the end of the Cretaceous this clade included large, short-armed forms alongside crow-sized, long-armed, possibly flying representatives. Expand
New evidence on deinonychosaurian dinosaurs from the Late Cretaceous of Patagonia
TLDR
A new, Late Cretaceous member of the clade, Neuquenraptor argentinus gen. et sp. Expand
A new carcharodontosaurid (Dinosauria, Theropoda) from the Upper Cretaceous of Argentina
A new carcharodontosaurid theropod from the Huincul Formation (Aptian-Cenomanian, Upper Cretaceous) of Neuquen Province, Argentina, is described. Approximately the same size as GiganotosaurusExpand
New evidence concerning avian origins from the Late Cretaceous of Patagonia
TLDR
A theropod dinosaur from Patagonia is described, Unenlagia comahuensis gen. et sp. Expand
New carnivorous dinosaur from the Late Cretaceous of NW Patagonia and the evolution of abelisaurid theropods
TLDR
It is suggested that isolated teeth originally referred as post-Cenomanian Carcharodontosauridae most probably belong to abelisaurids, and the development of horn-like structures and differential cranial thickening appear to be convergently acquired within Abelisauridae. Expand
A diminutive deinonychosaur (Dinosauria: Theropoda) from the Early Cretaceous of Öösh (Övörkhangai, Mongolia)
TLDR
The finding of a new small theropod specimen in the Öösh Formation adds to the deinonychosaur fossil record from the same beds, until now restricted to the dromaeosaurid Shanag ashile. Expand
The oldest Archaeopteryx (Theropoda: Avialiae): a new specimen from the Kimmeridgian/Tithonian boundary of Schamhaupten, Bavaria
TLDR
The iconic primeval bird Archaeopteryx was so far mainly known from the Altmühltal Formation of Bavaria, southern Germany, with one specimen having been found in the overlying Mörnsheim Formation, but a new specimen from the earliest Tithonian Painten Formation of Schamhaupten (Bavaria) represents the so far oldest representative of the genus. Expand
A new abelisaurid from the Huincul Formation (Cenomanian-Turonian; Upper Cretaceous) of Río Negro province, Argentina
Abstract The record of abelisaurids in South America, particularly Argentina is relatively abundant. However, abelisaurid diversity is far from being well-known. Huincul Formation has yielded diverseExpand
A new abelisauroid (Dinosauria: Theropoda) from the Huincul Formation (lower Upper Cretaceous, Neuquén Basin) of Patagonia, Argentina
TLDR
Phylogenetic analyses recovered Huinculsaurus as most closely related to the Late Jurassic Elaphrosaurus than to other Cretaceous abelisauroids, suggesting the persistence of the elaphrosaurine lineage in South America up to the early Late Cret Jurassic. Expand
...
1
2
3
4
5
...