The dinosaurian origin of feathers: perspectives from dolphin (Cetacea) collagen fibers

@article{LinghamSoliar2003TheDO,
  title={The dinosaurian origin of feathers: perspectives from dolphin (Cetacea) collagen fibers},
  author={Theagarten Lingham‐Soliar},
  journal={Naturwissenschaften},
  year={2003},
  volume={90},
  pages={563-567}
}
The early origin of birds is a hotly disputed debate and may be broadly framed as a conflict between paleontologists and ornithologists. The paleontological emphasis has shifted from Archaeopteryx and its origins to recent finds of Cretaceous birds and “feathered” dinosaurs from China. The identification of alleged feathers has, however, relied principally on the visual image. Some workers have interpreted these integumentary structures as collagen fibers. To test the latter hypothesis, using… 
Fossilized melanosomes and the colour of Cretaceous dinosaurs and birds
TLDR
It is reported that melanosomes (colour-bearing organelles) are not only preserved in the pennaceous feathers of early birds, but also in an identical manner in integumentary filaments of non-avian dinosaurs, thus refuting recent claims that the filaments are partially decayed dermal collagen fibres.
Do feathered dinosaurs exist? Testing the hypothesis on neontological and paleontological evidence
TLDR
It is suggested that Aves plus bird‐like maniraptoran theropods (e.g., microraptors and others) may be a separate clade, distinctive from the main lineage of Theropoda, a remnant of the early avian radiation, exhibiting all stages of flight and flightlessness.
Possible link connecting reptilian scales with avian feathers from the early Late Jurassic of Kazakstan
Organic tissue of a recently found second specimen of feather-like Praeornis from the Karabastau Formation of the Great Karatau Range in southern Kazakstan, has a stable carbon isotope composition
On the purported presence of fossilized collagen fibres in an ichthyosaur and a theropod dinosaur
TLDR
It is found that there is no evidence to support the idea that the integumentary structures seen in the two taxa are collagen fibres, and it is confirmed that the most parsimonious interpretation of fossilized structures that look like feather homologues in Sinosauropteryx is that they are indeed the remains of featherhomologues.
A new Chinese specimen indicates that ‘protofeathers’ in the Early Cretaceous theropod dinosaur Sinosauropteryx are degraded collagen fibres
TLDR
A new specimen of Sinosauropteryx is reported which shows that the integumental structures proposed as protofeathers are the remains of structural fibres that provide toughness.
Description and ontogenetic assessment of a new Jehol microraptorine
TLDR
It is confirmed that this microraptorine theropod was around a single year in age and still growing at death, but that the growth had slowed, which indicates that presence of a variety of feather types, including filamentous feathers, pennaceous primaries, and long rectrices, likely used for ornamentation, preceded skeletal maturity and full adult size.
The evolution of the feather: Sinosauropteryx, life, death and preservation of an alleged feathered dinosaur
TLDR
The signs point strongly to invertebrate colonization of the carcass of Sinosauropteryx rather than vertebrate predation or scavenging, with moderate decay associated with the purge fluids while major decay was forestalled by burial, at most a few days after death.
A new microraptorine theropod from the Jehol Biota and growth in early dromaeosaurids
TLDR
Comparison of histology in the new taxon and Sinornithosaurus indicates that macroscopic signs of maturity developed after the first year, but before cessation of growth, demonstrating that nonhistological indicators of adulthood may be misleading when applied to dromaeosaurids.
The evolution of the feather: Sinosauropteryx, a colourful tail
TLDR
From experiments on the decomposition of native collagen in fish and reptilian dermis, SEMs of their ultrastructure show that distinctive spherical, elliptical or oblate particles, even more so than those figured in Sinosauropteryx, typically form during degradation.
Dinosaur protofeathers: pushing back the origin of feathers into the Middle Triassic?
TLDR
The notion that primordial feathers occurred in a clade more inclusive than the Coelurosauria and that it is supported by the presence of integumental structures in Psittacosaurus is analyzed and rejected.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 32 REFERENCES
Evolution of birds: ichthyosaur integumental fibers conform to dromaeosaur protofeathers
TLDR
The overall findings of the study are that the thesis of dinosaur "protofeathers" requires more substantial support than exists at present.
Branched integumental structures in Sinornithosaurus and the origin of feathers
TLDR
Observations of the filamentous integumental appendages of the basal dromaeosaurid dinosaur Sinornithosaurus millenii indicate that they are compound structures composed of multiple filaments that are unique to avian feathers, which strongly corroborate the hypothesis that the integumentals of SinORNithosaurus are homologous with avan feathers.
Anatomy of Sinosauropteryx prima from Liaoning, northeastern China
A spectacular pair of Sinosauropteryx skeletons from Jurassic–Cretaceous strata of Liaoning in northeastern China attracted worldwide notoriety in 1996 as the first dinosaurs covered with
The Development of the Sauropsid Integument: A Contribution to the Problem of the Origin and Evolution of Feathers1
Abstract Developmental anatomical data are insufficient to discuss plausible intermediates between an ancestral, scaled, reptilian skin and appendage-bearing, avian skin. We also review adult tissue
Fossilization of feathers
TLDR
There may be a significant bias in the avian fossil record in favor of inland water habitats because Preservation in terrestrial and normal-marine settings involves very different processes (in amber and in authigenically mineralized coprolites, respectively).
The ichthyosaur integument: skin fibers, a means for a strong, flexible and smooth skin
The ichthyosaur skin is examined in order to further our understanding of the adaptation of these animals to the aquatic medium and their locomotory efficiency. Softtissue structures in two
The Evolutionary Origin of Feathers
  • P. Regal
  • Biology, Medicine
    The Quarterly Review of Biology
  • 1975
TLDR
The development of feathers is complex and a model is proposed that gives attention to the fundamental problems of deriving a branched structure with a cylindrical base from an elongated scale.
Palaeontology: 'Modern' feathers on a non-avian dinosaur
TLDR
The occurrence of pinnate feathers, which clearly feature a rachis and barbs, on a small, non-avian dromaeosaur from northern China indicates that feathers of modern aspect evolved in dinosaurs before the emergence of birds and flight.
Development and evolutionary origin of feathers.
  • R. Prum
  • Biology, Medicine
    The Journal of experimental zoology
  • 1999
TLDR
A functionally neutral model of the origin and evolutionary diversification of bird feathers based on the hierarchical details of feather development is proposed, predicting that feathers originated with the evolution of the first feather follicle-a cylindrical epidermal invagination around the base of a dermal papilla.
On How an Archosaurian Scale Might Have Given Rise to an Avian Feather
TLDR
The homing ability of the neotropica~l bat Phyllostomus hastatus, with evidence for visual orientation, and the random element in bird navigation are studied.
...
1
2
3
4
...