A new transitional sauropodomorph dinosaur from the Early Jurassic of South Africa and the evolution of sauropod feeding and quadrupedalism
- A. Yates, Matthew F. Bonnan, J. Neveling, A. Chinsamy, M. Blackbeard
- BiologyProceedings of the Royal Society B: Biological…
- 7 March 2010
Cursorial ability appears to have been reduced and the weight bearing axis of the pes shifted to a medial, entaxonic position, falsifying the hypothesis that entaxony evolved in sauropods only after an obligate quadrupedal gait had been adopted.
Sauropod dinosaur embryos from the Late Cretaceous of Patagonia
- L. Chiappe, R. Coria, L. Dingus, Frankie D. Jackson, A. Chinsamy, M. Fox
- Environmental Science, GeographyNature
- 19 November 1998
The first known unequivocal embryonic remains of sauropod dinosaurs—the only known non-avian dinosaur embryos from Gondwana—are described from a nesting ground in the Upper Cretaceous stage of Patagonia, Argentina and it is proposed that these specimens belong to the same sauroPod species.
Mesozoic avian bone microstructure: physiological implications
The bone microstructure of the Late Cretaceous birds Patagopteryx deferrariisi and members of the Enantiornithes is reported, suggesting that birds developed classic endothermy relatively late in their phylogenetic history.
Physiological implications of the bone histology of Syntarsus rhodesiensis (Saurischia: Theropoda)
- A. Chinsamy
The general bone histology is described initially and thereafter follow speculations on the animal's thermoregulatory ability, possible evidence for sexual dimorphism, and also the probable growth strategy it employed, as reflected in its bone Histology.
A new raptorial dinosaur with exceptionally long feathering provides insights into dromaeosaurid flight performance.
It is demonstrated how the low-aspect-ratio tail of the new fossil would have acted as a pitch control structure reducing descent speed and thus playing a key role in landing and insight into the flight performance of microraptorines is provided.
BONE HISTOLOGY AND GROWTH PATTERNS OF SOME NONMAMMALIAN THERAPSIDS
The analysis of bone histology of gorgonopsian, therocephalian and cynodont genera, ranging from the Late Permian to Early Jurassic, reveals a predominance of cortical fibrolamellar bone tissue in most skeletal elements.
Functional aspects of the postcranial anatomy of the Permian dicynodont Diictodon and their ecological implications
The postcranial skeleton of the Permian dicynodont Diictodon is described, major skeletal muscles restored and functional aspects of the skeleton analyzed, and it is indicated that the animals lived close together but did not share a single large communal structure.
A Large Bird from the Early Cretaceous of China: New Information on the Skull of Enantiornithines
The histological characterization of CNUVB-0903 indicates that it was not yet a full-grown individual at the time of death, and supports previous evidence indicating that early in their history, enantiornithines were able to achieve relatively large sizes.
Bone microstructure of the divingHesperornisand the voltantIchthyornisfrom the Niobrara Chalk of western Kansas
Abstract We report on the bone microstructure of the Cretaceous birdsHesperornis regalisandIchthyornis victor. Thin sections of representative elements of both these ornithurine birds show a rapid,…
Polar dinosaur bone histology
ABSTRACT We report on the bone microstructure of a hypsilophodont and an ornithomimosaur from the Early Cretaceous, Otway Group of Dinosaur Cove in south-eastern Australia, which at the time lay well…