Synchrotron scanning reveals amphibious ecomorphology in a new clade of bird-like dinosaurs

  title={Synchrotron scanning reveals amphibious ecomorphology in a new clade of bird-like dinosaurs},
  author={Andrea Cau and Vincent Beyrand and Dennis F.A.E. Voeten and Vincent Fernandez and Paul Tafforeau and Koen Stein and Rinchen Barsbold and Khishigjav Tsogtbaatar and Philip J. Currie and Pascal Godefroit},
Maniraptora includes birds and their closest relatives among theropod dinosaurs. During the Cretaceous period, several maniraptoran lineages diverged from the ancestral coelurosaurian bauplan and evolved novel ecomorphologies, including active flight, gigantism, cursoriality and herbivory. Propagation X-ray phase-contrast synchrotron microtomography of a well-preserved maniraptoran from Mongolia, still partially embedded in the rock matrix, revealed a mosaic of features, most of them absent… 
The phylogenetic affinities and morphological peculiarities of the bird-like dinosaur Borogovia gracilicrus from the Upper Cretaceous of Mongolia
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The body plan of Halszkaraptor escuilliei (Dinosauria, Theropoda) is not a transitional form along the evolution of dromaeosaurid hypercarnivory
  • A. Cau
  • Environmental Science, Biology
  • 2020
The halszkaraptorine bauplan is confirmed as a derived amphibious specialization, and does not represent a “transitional” stage along the evolution of dromaeosaurids.
A New Dromaeosaurid (Dinosauria: Coelurosauria) from Khulsan, Central Mongolia
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  • Environmental Science
    Bulletin of the American Museum of Natural History
  • 2020
New Dromaeosaurid Dinosaur (Theropoda, Dromaeosauridae) from New Mexico and Biodiversity of Dromaeosaurids at the end of the Cretaceous
Dromaeosaurids (Theropoda: Dromaeosauridae), a group of dynamic, swift predators, have a sparse fossil record, particularly at the time of their extinction near the Cretaceous-Paleogene boundary.
Paravian Phylogeny and the Dinosaur-Bird Transition: An Overview
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Redescription and affinities of Hulsanpes perlei (Dinosauria, Theropoda) from the Upper Cretaceous of Mongolia
Hulsanpes perlei is an enigmatic theropod dinosaur from the Baruungoyot Formation (?mid- to upper Campanian, Upper Cretaceous) of Mongolia. It was discovered in 1970, during the third


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The gigantic Gigantoraptor shows many bird-like features absent in its smaller oviraptorosaurian relatives, unlike the evolutionary trend seen in many other coelurosaurian subgroups.
The phylogenetic affinities of the bizarre Late Cretaceous Romanian theropod Balaur bondoc (Dinosauria, Maniraptora): dromaeosaurid or flightless bird?
The reinterpretation of Balaur implies that a superficially dromaeosaurid-like taxon represents the enlarged, terrestrialised descendant of smaller and probably volant ancestors, and its phylogenetic placement within Avialae is not biased by character weighting.
A Review of Dromaeosaurid Systematics and Paravian Phylogeny
This study provides the most detailed and comprehensive phylogenetic analysis of paravians to date in order to explore the phylogenetic history of dromaeosaurid taxa and reviews and revises the membership of DromaeOSauridae and provides an apomorphy-based diagnosis for all valid taxa.
A bizarre Jurassic maniraptoran theropod with preserved evidence of membranous wings
Documentation of the unique forelimbs of Yi greatly increases the morphological disparity known to exist among dinosaurs, and highlights the extraordinary breadth and richness of the evolutionary experimentation that took place close to the origin of birds.
Osteology of Khaan mckennai (Oviraptorosauria: Theropoda)
The primary goal of this paper is to provide a relatively comprehensive descriptive morphology and illustrations for one member of Oviraptoridae, namely Khaan mckennai, with an emphasis on characters that can be used to establish a phylogenetic hypothesis for the taxon and group as a whole.
The arctometatarsalian pes, an unusual structure of the metatarsus of Cretaceous Theropoda (Dinosauria: Saurischia)
  • T. Holtz
  • Biology, Environmental Science
  • 1995
Morphometric analysis indicates that the arctometatarsalian structure is significantly more elongate and gracile than underived metatarsi, and this structure is associated with relatively elongate distal hind limbs per unit femoral length.
Skeletal morphology and relationships of the early Cretaceous side-necked turtle, Araripemys barretoi (Testudines: Pelomedusoides: Araripemydidae), from the Santana Formation of Brazil
Examination of 35 skeletal characters in six living and nine extinct taxa suggest that there are four distinct clades in the Pelomedusidae (sensu lato).
Anatomy of Mahakala omnogovae (Theropoda: Dromaeosauridae), Tögrögiin Shiree, Mongolia
Several interesting features of Mahakala omnogovae have implications for deinonychosaurian and avialan character evolution and for understanding patterns of size variation and size change within paravian theropods.
  • L. Xing, W. Persons, P. Currie
  • Environmental Science, Geography
    Evolution; international journal of organic evolution
  • 2013
The largest specimen of the four‐winged dromaeosaurid dinosaur Microraptor gui includes preserved gut contents, which offer unique insights into the ecology of nonavian dinosaurs early in the evolution of flight.
The Teeth of the Unenlagiine Theropod Buitreraptor from the Cretaceous of Patagonia, Argentina, and the Unusual Dentition of the Gondwanan Dromaeosaurids
Gianechini, F.A., Makovicky, P.J., and Apesteguía, S. 2011. The teeth of the unenlagiine theropod Buitreraptor from the Cretaceous of Patagonia, Argentina, and the unusual dentition of the Gondwanan