Palaeontology: Scales, feathers and dinosaurs

  title={Palaeontology: Scales, feathers and dinosaurs},
  author={Xing(徐星) Xu},
A fossil dinosaur that ‘nests’ with feathered relations in the dinosaur phylogenetic tree did not, it seems, have feathers. The discovery will encourage a re-evaluation of feather evolution.Feather OutlookSmall, Late Jurassic carnivorous dinosaurs are rare worldwide, and in Europe are represented by just two poorly preserved Compsognathus skeletons. Göhlich and Chiappe describe a previously unknown theropod which, like Compsognathus and most specimens of Archaeopteryx, is from the Late Jurassic… 

Integumentary Structures in Kulindadromeus zabaikalicus, a Basal Neornithischian Dinosaur from the Jurassic of Siberia

Kulindadromeus zabaikalicus, a basal neornithischian dinosaur from the Jurassic of Siberia, preserves diverse integumentary structures, including monofilaments, more complex protofeather structures and scales on its tail and distal parts of its limbs, suggesting that integumental features were diversified even in ornithischians.

A bizarre Jurassic maniraptoran from China with elongate ribbon-like feathers

This finding shows that a member of the avialan lineage experimented with integumentary ornamentation as early as the Middle to Late Jurassic, and provides further evidence relating to this aspect of the transition from non-avian theropods to birds.

Note on the paleobiogeography of Compsognathidae (Dinosauria: Theropoda) and its paleoecological implications.

The paleobiogeography of the theropod clade Compsognathidae is here reaccessed in order to test the hypothesis of this taxon being adapted specifically to inhabit semi-arid environments. Data about

New occurrences of fossilized feathers: systematics and taphonomy of the Santana Formation of the Araripe Basin (Cretaceous), NE, Brazil

Feathered non-avian dinosaurs have not yet been described from the Crato Member, even though there are suggestions of their presence in nearby basins, and it is revealed that, despite the small sample size, they can be referred to coelurosaurian theropods.

Feather Evolution in Pennaraptora

The origin and early evolution of complex feathers and flight abilities in paravian theropods were not linear processes, but more complex than previously thought.

The Presence of Ankylosaur Tracks in the Guará Formation (Brazil) and Remarks on the Spatial and Temporal Distribution of Late Jurassic Dinosaurs

ABSTRACT The Guará Formation (Paraná Basin, southern Brazil) is an Upper Jurassic unit that yielded a dinosaur ichnoassemblage composed of theropod, ornithopod, and sauropod tracks. A new set of

The dorsal appendages of the Triassic reptile Longisquama insignis: reconsideration of a controversial integument type

The existing feather similarity is explained by their development from a filamentous primordium and a complex sequence of individual processes, some of which are reminiscent of processes observed in feather development.

The socio-sexual behaviour of extant archosaurs: implications for understanding dinosaur behaviour

  • T. Isles
  • Geography, Environmental Science
  • 2009
It is proposed that for the majority of dinosaurs there was no post-hatching care provided which would have allowed adults energy acquisition that would otherwise have been required for defence and provisioning to be redirected towards growth and increased fecundity, both traits for which there is fossil evidence.

Molekulare Evolutionsforschung: Methoden, Phylogenie, Merkmalsevolution und Phylogeographie

Der britische Biologe Falkner untersuchte um 1900 immunologische Merkmale in Blutproben von Menschen und Menschenaffen (Schimpanse, Gorilla, Orang-Utan und Gibbon). Schon damals erkannte der Autor,

Self-assembly of 3D prestressed tensegrity structures from DNA

N nanoscale, prestressed, three-dimensional tensegrity structures in which rigid bundles of DNA double helices resist compressive forces exerted by segments of single-stranded DNA that act as tension-bearing cables are reported.



A new carnivorous dinosaur from the Late Jurassic Solnhofen archipelago

A cladistic analysis indicates that the new theropod dinosaur described from the Late Jurassic period of Schamhaupten in southern Germany is closer to maniraptorans than to tyrannosauroids, grouping it with taxa often considered to be compsognathids.

The evolution of dinosaurs.

  • P. Sereno
  • Environmental Science, Geography
  • 1999
The ascendancy of dinosaurs on land near the close of the Triassic now appears to have been as accidental and opportunistic as their demise and replacement by therian mammals at the end of the

An exceptionally well-preserved theropod dinosaur from the Yixian Formation of China

The two nearly complete skeletons of a small theropod that represent a species closely related to Compsognathus are described, Sinosauropteryx, which has the longest tail of any known theropid, and a three-fingered hand dominated by the first finger.

Feathered dragons : studies on the transition from dinosaurs to birds

This book presents new information on Bambiraptor feinbergi (Theropoda: Dromaeosauridae) from the Late Cretaceous of Montana and the Arboreal Origin of Avian Flight from China, and discusses the role of acid rain in the end-Cretaceous extinction process.

The morphogenesis of feathers

The replication-competent avian sarcoma retrovirus is used to deliver exogenous genes to regenerating flight feather follicles of chickens, and it is shown that the antagonistic balance between noggin and bone morphogenetic protein 4 (BMP4) has a critical role in feather branching.

The Evolutionary Origin And Diversification Of Feathers

The developmental theory proposes that feathers evolved through a series of evolutionary novelties in developmental mechanisms of the follicle and feather germ, and the discovery of primitive feather fossils on nonavian theropod dinosaurs documents that feathers evolve and diversified in nonavIAN theropods before the origin of birds and before theorigin of flight.

A basal tyrannosauroid dinosaur from the Late Jurassic of China

The tyrannosauroid fossil record is mainly restricted to Cretaceous sediments of Laurasia, although some very fragmentary Jurassic specimens have been referred to this group. Here we report a new