Title |
New clade of enigmatic early archosaurs yields insights into early pseudosuchian phylogeny and the biogeography of the archosaur radiation
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Published in |
BMC Ecology and Evolution, June 2014
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DOI | 10.1186/1471-2148-14-128 |
Pubmed ID | |
Authors |
Richard J Butler, Corwin Sullivan, Martín D Ezcurra, Jun Liu, Agustina Lecuona, Roland B Sookias |
Abstract |
The origin and early radiation of archosaurs and closely related taxa (Archosauriformes) during the Triassic was a critical event in the evolutionary history of tetrapods. This radiation led to the dinosaur-dominated ecosystems of the Jurassic and Cretaceous, and the high present-day archosaur diversity that includes around 10,000 bird and crocodylian species. The timing and dynamics of this evolutionary radiation are currently obscured by the poorly constrained phylogenetic positions of several key early archosauriform taxa, including several species from the Middle Triassic of Argentina (Gracilisuchus stipanicicorum) and China (Turfanosuchus dabanensis, Yonghesuchus sangbiensis). These species act as unstable 'wildcards' in morphological phylogenetic analyses, reducing phylogenetic resolution. |
X Demographics
Geographical breakdown
Country | Count | As % |
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United Kingdom | 3 | 20% |
Australia | 2 | 13% |
United States | 1 | 7% |
Argentina | 1 | 7% |
Spain | 1 | 7% |
Indonesia | 1 | 7% |
Chile | 1 | 7% |
Unknown | 5 | 33% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 8 | 53% |
Scientists | 5 | 33% |
Science communicators (journalists, bloggers, editors) | 1 | 7% |
Practitioners (doctors, other healthcare professionals) | 1 | 7% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Germany | 1 | 1% |
Chile | 1 | 1% |
France | 1 | 1% |
Sweden | 1 | 1% |
Argentina | 1 | 1% |
Japan | 1 | 1% |
United States | 1 | 1% |
Unknown | 65 | 90% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 16 | 22% |
Student > Ph. D. Student | 12 | 17% |
Student > Bachelor | 10 | 14% |
Student > Master | 8 | 11% |
Student > Doctoral Student | 4 | 6% |
Other | 4 | 6% |
Unknown | 18 | 25% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 26 | 36% |
Earth and Planetary Sciences | 19 | 26% |
Biochemistry, Genetics and Molecular Biology | 2 | 3% |
Environmental Science | 2 | 3% |
Nursing and Health Professions | 1 | 1% |
Other | 3 | 4% |
Unknown | 19 | 26% |