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On the phylogeny and evolutionary history of pterosaurs
- D. Unwin
- BiologyGeological Society, London, Special Publications
The pattern of pterosaur evolution suggested by the results of this analysis is broadly similar to traditional ideas, but has greater resolution, more complexity and reveals several previously unrecognized ‘events’.
Evidence for modular evolution in a long-tailed pterosaur with a pterodactyloid skull
- J. Lü, D. Unwin, Xingsheng Jin, Yongqing Liu, Q. Ji
- Biology, Environmental ScienceProceedings of the Royal Society B: Biological…
- 7 February 2010
Darwinopterus exhibits a remarkable ‘modular’ combination of characters: the skull and neck are typically pterodactyloid, exhibiting numerous derived character states, while the remainder of the skeleton is almost completely plesiomorphic and identical to that of basal pterosaurs, supporting the idea that modules were the principal focus of natural selection and played a leading role in evolutionary transitions.
An overview of the pterosaur assemblage from the Cambridge Greensand (Cretaceous) of Eastern England
- D. Unwin
The Cambridge Greensand pterosaur assemblage is similar to a slightly younger, but much smaller assemblages from the Lower Chalk of England and shares some elements, such as ornithocheirids, in common with many other late Early and early Late Cretaceous assemblelages.
A survey of pterosaurs from the Jurassic and Cretaceous of the former Soviet Union and Mongolia
Remains of pterosaurs, the dominant aerial vertebrate throughout much of the Mesozoic were, until relatively recently, almost exclusively known from marine and marginal marine sediments of western…
An Egg-Adult Association, Gender, and Reproduction in Pterosaurs
- J. Lü, D. Unwin, D. Deeming, Xingsheng Jin, Yongqing Liu, Q. Ji
- Environmental Science, GeographyScience
- 21 January 2011
Examples of Darwinopterus preserved together with an egg from the Jurassic of China demonstrate that males of this pterosaur had a relatively small pelvis and a large cranial crest, whereas females had a comparatively largepelvis and no crest.
A new azhdarchoid pterosaur from the Lower Cretaceous of China and its implications for pterosaur phylogeny and evolution
A complete, articulated skeleton of a 1.4-m-wingspan pterosaur from the Lower Cretaceous Jiufotang Formation of Liaoning Province, China is reported and it is identified as a new genus and species, Shenzhoupterus chaoyangensis gen. nov.
New pterosaur tracks (Pteraichnidae) from the Late Cretaceous Uhangri Formation, southwestern Korea
- K. Hwang, M. Huh, M. Lockley, D. Unwin, Joanna L. Wright
- Environmental Science, GeographyGeological Magazine
- 1 October 2001
Numerous footprints of dinosaurs, pterosaurs and birds, together with arthropod tracks, have been discovered in the upper Cretaceous Uhangri Formation which crops out along the south-western…
Respiratory Evolution Facilitated the Origin of Pterosaur Flight and Aerial Gigantism
Various lines of skeletal evidence indicate that pterosaurs had a highly effective flow-through respiratory system, capable of sustaining powered flight, predating the appearance of an analogous breathing system in birds by approximately seventy million years.