Enigmatic dinosaur precursors bridge the gap to the origin of Pterosauria

  title={Enigmatic dinosaur precursors bridge the gap to the origin of Pterosauria},
  author={Mart{\'i}n Daniel Ezcurra and Sterling J. Nesbitt and Mario Bronzati and Fabio Marco Dalla Vecchia and Federico L. Agnolin and Roger B. J. Benson and Federico Briss{\'o}n Egli and S{\'e}rgio Furtado Cabreira and Serjoscha W. Evers and Adriel R. Gentil and Randall B. Irmis and Agustín G. Martinelli and Fernando E Novas and L{\'u}cio Roberto da Silva and Nathan D Smith and Michelle R. Stocker and Alan H. Turner and Max Cardoso Langer},
Pterosaurs were the first vertebrates to evolve powered flight 1 and comprised one of the main evolutionary radiations in terrestrial ecosystems of the Mesozoic era (approximately 252–66 million years ago), but their origin has remained an unresolved enigma in palaeontology since the nineteenth century 2 – 4 . These flying reptiles have been hypothesized to be the close relatives of a wide variety of reptilian clades, including dinosaur relatives 2 – 8 , and there is still a major morphological… 
The origin of Pterosaurs
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  • Geography, Environmental Science
  • 2021
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Most Triassic terrestrial diapsids belong to two clades, Lepidosauromorpha or (the more diverse) Archosauromorpha. Nevertheless, the phylogenetic relationships of some Triassic diapsids have remained
Pendraig milnerae, a new small-sized coelophysoid theropod from the Late Triassic of Wales
The authors' analyses indicate that, in contrast with averostran-line neotheropods, coelophysoids underwent a small body size decrease early in their evolution, and there is ambiguous evidence to indicate that this species was subjected to dwarfism.
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A new phylogenetic hypothesis of Tanystropheidae (Diapsida, Archosauromorpha) and other “protorosaurs”, and its implications for the early evolution of stem archosaurs
The polyphyly of “Protorosauria” is confirmed and therefore the usage of this term should be abandoned and a new phylogenetic hypothesis is presented that comprises a wide range of archosauromorphs, including the most exhaustive sample of ”protorosaurs” to date and several “protorosaur” taxa from the eastern Tethys margin that have not been included in any previous analysis.
The rhynchosaur record, including a new stenaulorhynchine taxon, from the Chañares Formation (upper Ladinian–?lowermost Carnian levels) of La Rioja Province, north-western Argentina
Rhynchosaurs were quadrupedal, bulky herbivorous archosauromorph diapsids with a highly specialized dental apparatus. This group is restricted to the Triassic Period and became extremely abundant
On the homology of crocodylian post-dentary bones and their macroevolution throughout Pseudosuchia.
Embryological and paleontological data indicates that most perifenestral centers are involved in the origin of the prearticular of non-mesoeucrocodylian pseudosuchians, bolstering the idea that the coronoid and the articular of Crocodylia are not completely homologous to those of other diapsids.
Reassessment of Faxinalipterus minimus, a purported Triassic pterosaur from southern Brazil with the description of a new taxon
The phylogenetic analysis places Faxinalipterus minimus within Lagerpetidae and Maehary bonapartei gen. et sp.
Sinomacrops bondei, a new anurognathid pterosaur from the Jurassic of China and comments on the group
This work presents a new genus and species from the Middle-Late Jurassic Tiaojishan Formation, the third nominal anurognathid speciesFrom the Jurassic of China, and provides a new phylogenetic analysis incorporating into a single data set characters from diverging phylogenetic proposals.


A tiny ornithodiran archosaur from the Triassic of Madagascar and the role of miniaturization in dinosaur and pterosaur ancestry
Analysis of ancestral body size indicates that there was a pronounced miniaturization event near the common ancestor of dinosaurs and pterosaurs, and an analysis of body size evolution in dinosaurs and other archosaurs demonstrates that the earliest-diverging members of the group may have been smaller than previously thought.
Ecologically distinct dinosaurian sister group shows early diversification of Ornithodira
The analysis suggests that the dentition and diet of silesaurids, ornithischians and sauropodomorphs evolved independently from a plesiomorphic carnivorous form, and Asilisaurus demonstrates the antiquity of both Ornithodira and the dinosaurian lineage.
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A state-of-the-art examination of early archosaur groups and their close relatives including historical, anatomical, biogeographical, evolutionary and palaeobiological data is presented.
A Jurassic pterosaur from Patagonia and the origin of the pterodactyloid neurocranium
A µCT ray-generated virtual endocast shows that the new pterosaur exhibits a mosaic of plesiomorphic and derived traits of the inner ear and neuroanatomy that fills an important gap between those of non-monofenestratan breviquartossans (Rhamphorhynchidae) and derived pterodactyloids.
The earliest bird-line archosaurs and the assembly of the dinosaur body plan.
It is demonstrated that several anatomical features long thought to characterize Dinosauria and dinosauriforms evolved much earlier, soon after the bird-crocodylian split, and that the earliest avemetatarsalians retained the croc Codylian-like ankle morphology and hindlimb proportions of stem archosaurs and early pseudosuchians.
The origin and early evolution of dinosaurs
The oldest unequivocal records of Dinosauria were unearthed from Late Triassic rocks accumulated over extensional rift basins in southwestern Pangea, and the group achieved a nearly global distribution by the latest Triassic, especially with the radiation of saurischian groups such as “prosauropods” and coelophysoids.
Scleromochlus taylori and the origin of dinosaurs and pterosaurs
A reanalysis of crown–group archosaur relationships confirms the split into Crurotarsi (crocodile relatives) and Ornithodira (bird relatives), as well as the clear division of Ornithadira into Pterosauria and Dinosauromorpha.
Classification and phylogeny of the diapsid reptiles
  • M. Benton
  • Environmental Science, Geography
  • 1985
A cladistic analysis of skull and skeletal characters of all described Permo-Triassic diapsid reptiles suggests some significant rearrangements to commonly held views of the Diapsida.
The Early Evolution of Archosaurs: Relationships and the Origin of Major Clades
A time-calibrated phylogeny of Archosauriformes indicates that the origin and initial diversification of archosauria occurred during the Early Triassic following the Permian-Triassic extinction.