| Title |
Extreme Cranial Ontogeny in the Upper Cretaceous Dinosaur Pachycephalosaurus
|
|---|---|
| Published in |
PLOS ONE, October 2009
|
| DOI | 10.1371/journal.pone.0007626 |
| Pubmed ID | |
| Authors |
John R. Horner, Mark B. Goodwin |
| Abstract |
Extended neoteny and late stage allometric growth increase morphological disparity between growth stages in at least some dinosaurs. Coupled with relatively low dinosaur density in the Upper Cretaceous of North America, ontogenetic transformational representatives are often difficult to distinguish. For example, many hadrosaurids previously reported to represent relatively small lambeosaurine species were demonstrated to be juveniles of the larger taxa. Marginocephalians (pachycephalosaurids + ceratopsids) undergo comparable and extreme cranial morphological change during ontogeny. |
X Demographics
The data shown below were collected from the profiles of 33 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 5 | 15% |
| Japan | 4 | 12% |
| United Kingdom | 3 | 9% |
| France | 1 | 3% |
| Thailand | 1 | 3% |
| Spain | 1 | 3% |
| Canada | 1 | 3% |
| Argentina | 1 | 3% |
| Unknown | 16 | 48% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 24 | 73% |
| Scientists | 7 | 21% |
| Science communicators (journalists, bloggers, editors) | 1 | 3% |
| Unknown | 1 | 3% |
Mendeley readers
The data shown below were compiled from readership statistics for 186 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 8 | 4% |
| United Kingdom | 3 | 2% |
| Chile | 2 | 1% |
| Canada | 2 | 1% |
| Argentina | 2 | 1% |
| Portugal | 1 | <1% |
| Germany | 1 | <1% |
| Colombia | 1 | <1% |
| Spain | 1 | <1% |
| Other | 1 | <1% |
| Unknown | 164 | 88% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 35 | 19% |
| Researcher | 35 | 19% |
| Student > Master | 30 | 16% |
| Student > Bachelor | 25 | 13% |
| Student > Doctoral Student | 10 | 5% |
| Other | 29 | 16% |
| Unknown | 22 | 12% |
| Readers by discipline | Count | As % |
|---|---|---|
| Earth and Planetary Sciences | 76 | 41% |
| Agricultural and Biological Sciences | 60 | 32% |
| Biochemistry, Genetics and Molecular Biology | 6 | 3% |
| Environmental Science | 4 | 2% |
| Medicine and Dentistry | 4 | 2% |
| Other | 10 | 5% |
| Unknown | 26 | 14% |