Project 3502: V. Beyrand, D. F. Voeten, S. Bureš, V. Fernandez, J. Janáček, D. Jirák, O. Rauhut, P. Tafforeau. 2019. Multiphase progenetic development shaped the brain of flying archosaurs. Scientific Reports. 9 (1):1-15.
Abstract
The growing availability of virtual cranial endocasts of extinct and extant vertebrates has fueled the quest for endocranial characters that discriminate between phylogenetic groups and resolve their neural significances. We used geometric morphometrics to compare a phylogenetically and ecologically comprehensive data set of archosaurian endocasts along the deep evolutionary history of modern birds and found that this lineage experienced progressive elevation of encephalisation through several chapters of increased endocranial doming that we demonstrate to result from progenetic developments. Elevated encephalisation associated with progressive size reduction within Maniraptoriformes was secondarily exapted for flight by stem avialans. Within Mesozoic Avialae, endocranial doming increased in at least some Ornithurae, yet remained relatively modest in early Neornithes. During the Paleogene, volant non-neoavian birds retained ancestral levels of endocast doming where a broad neoavian niche diversification experienced heterochronic brain shape radiation, as did non-volant Palaeognathae. We infer comparable developments underlying the establishment of pterosaurian brain shapes.Read the article »
Article DOI: 10.1038/s41598-019-46959-2
Project DOI: 10.7934/P3502, http://dx.doi.org/10.7934/P3502
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- Creation Date:
23 July 2019 - Publication Date:
09 August 2019 - Project views: 106827
- Media downloads: 227
Authors' Institutions
- Akademie Ved CR (Czech Academy of Sciences)
- Charles University in Prague
- Ludwig-Maximilians-Universitaet Muenchen
- Palacky University
- European Synchrotron Radiation Facility
- Institute for Clinical and Experimental Medicine (IKEM)
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Vincent Beyrand Project Administrator | 145 | 144 | 143 |
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