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Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/9019

Title: An Egg-Adult Association, Gender, and Reproduction in Pterosaurs
Authors: Lü, Junchang
Unwin, David M.
Deeming, D. Charles
Jin, Xingsheng
Liu, Yongqing
Ji, Qiang
Issue Date: 21-Jan-2011
Publisher: Highwire Press on behalf of the American Association for the Advancement of Science
Citation: Science, 2011, 331 (6015), pp. 321-324.
Abstract: A sexually mature individual of Darwinopterus preserved together with an egg from the Jurassic of China provides direct evidence of gender in pterosaurs and insights into the reproductive biology of these extinct fliers. This new find and several other examples of Darwinopterus demonstrate that males of this pterosaur had a relatively small pelvis and a large cranial crest, whereas females had a relatively large pelvis and no crest. The ratio of egg mass to adult mass is relatively low, as in extant reptiles, and is comparable to values for squamates. A parchment-like eggshell points to burial and significant uptake of water after oviposition. This evidence for low parental investment contradicts the widespread assumption that reproduction in pterosaurs was like that of birds and shows that it was essentially like that of reptiles.
ISSN: 0036-8075
Links: http://dx.doi.org/10.1126/science.1197323
http://www.sciencemag.org/content/331/60(...)
http://hdl.handle.net/2381/9019
Type: Article
Description: This paper was published as Science, 2011, 331 (6015), pp. 321-324. It is available from http://www.sciencemag.org/content/331/6015/321.abstract. Doi: 10.1126/science.1197323
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Appears in Collections:Published Articles, School of Museum Studies

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