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Soft-Tissue Vessels and Cellular Preservation in Tyrannosaurus rex
Soft tissues are preserved within hindlimb elements of Tyrannosaurus rex and removal of the mineral phase reveals transparent, flexible, hollow blood vessels containing small round microstructures that can be expressed from the vessels into solution. Expand
Response to Comment on "Protein Sequences from Mastodon and Tyrannosaurus rex Revealed by Mass Spectrometry"
Endogenous peptide sequences extracted from a 68-million-year-old Tyrannosaurus rex fossil bone and obtained by mass spectrometry have been shown to be statistically significant based on protein… Expand
LATE CRETACEOUS AVIAN EGGS WITH EMBRYOS FROM ARGENTINA
- M. Schweitzer, Frankie D. Jackson, L. Chiappe, J. Schmitt, J. Calvo, David E. Rubilar
- 14 March 2002
This data indicates that the distribution of Carboniferous strata in the Northern Hemisphere has changed significantly in recent centuries, with the largest changes occurring in the western hemisphere during the Bronze and Iron Age. Expand
Beta-keratin specific immunological reactivity in feather-like structures of the cretaceous alvarezsaurid, Shuvuuia deserti.
- M. Schweitzer, J. Watt, +4 authors M. Marshall
- Biology, Medicine
- The Journal of experimental zoology
- 15 August 1999
Morphological, microscopic, mass spectrometric, and immunohistochemical studies suggest that proteinaceous components may survive across geological time and support the view that alvarezsaurids (Shuvuuia and its allies) are either a lineage of birds or are a lineage phylogenetically close to them. Expand
Analyses of Soft Tissue from Tyrannosaurus rex Suggest the Presence of Protein
The results indicate that collagen I, the main organic component of bone, has been preserved in low concentrations in these tissues and a possible chemical pathway that may contribute to this preservation is proposed. Expand
Melanosomes or Microbes: Testing an Alternative Hypothesis for the Origin of Microbodies in Fossil Feathers
‘Mouldic impressions’ were observed in association with both the feather and sediment grains, supporting a microbial origin and a criteria for distinguishing between these two microbodies is proposed. Expand
The Sauropods: Evolution and Paleobiology
- M. Schweitzer
- 28 February 2007
The Sauropods, edited by K. Curry-Rogers and J. Wilson, provides a comprehensive summary of work done in the area discussed, and provides a wonderful starting place for students of dinosaur biology interested in any area of study. Expand
Soft tissue and cellular preservation in vertebrate skeletal elements from the Cretaceous to the present
- M. Schweitzer, J. Wittmeyer, J. Horner
- Proceedings of the Royal Society B: Biological…
- 22 January 2007
The results suggest that present models of fossilization processes may be incomplete and that soft tissue elements may be more commonly preserved, even in older specimens, than previously thought. Expand
Molecular analyses of dinosaur osteocytes support the presence of endogenous molecules.
These data are the first to support preservation of multiple proteins and to present multiple lines of evidence for material consistent with DNA in dinosaurs, supporting the hypothesis that these structures were part of the once living animals. Expand
Alligator osteoderms as a source of labile calcium for eggshell formation
Scute (osteoderm) X-ray density was significantly greater in females with ripe ovarian follicles compared with those that had recently laid or contained heavily calcified eggs within their oviducts, suggesting that the scutes play a role in Ca storage during egglay. Expand