Ecologically distinct dinosaurian sister group shows early diversification of Ornithodira
- S. Nesbitt, C. Sidor, R. Irmis, K. Angielczyk, Roger M. H. Smith, L. A. Tsuji
- Environmental Science, GeographyNature
- 4 March 2010
The analysis suggests that the dentition and diet of silesaurids, ornithischians and sauropodomorphs evolved independently from a plesiomorphic carnivorous form, and Asilisaurus demonstrates the antiquity of both Ornithodira and the dinosaurian lineage.
Patterns of morphospace occupation and mechanical performance in extant crocodilian skulls: A combined geometric morphometric and finite element modeling approach
- S. Pierce, K. Angielczyk, E. Rayfield
- Geography, Environmental ScienceJournal of morphology
- 1 July 2008
It is shown that biomechanical stress and the hydrodynamic properties of the skull show a strong relationship with the distribution of crocodilians in skull morphospace, whereas phylogeny and biogeography show weak or no correlation.
The earliest bird-line archosaurs and the assembly of the dinosaur body plan.
It is demonstrated that several anatomical features long thought to characterize Dinosauria and dinosauriforms evolved much earlier, soon after the bird-crocodylian split, and that the earliest avemetatarsalians retained the croc Codylian-like ankle morphology and hindlimb proportions of stem archosaurs and early pseudosuchians.
Bringing Dicynodonts Back to Life: Paleobiology and Anatomy of a New Emydopoid Genus from the Upper Permian of Mozambique
A new dicynodont (Therapsida, Anomodontia) from northern Mozambique is described and synchrotron radiation based micro-computed tomography (SRµCT) combined with a phylogenetic analysis demonstrates a set of characters shared with Emydopoidea.
The Daptocephalus Assemblage Zone (Lopingian), South Africa: A proposed biostratigraphy based on a new compilation of stratigraphic ranges
A comprehensive taxonomic revision of Dicynodon (Therapsida, Anomodontia) and its implications for dicynodont phylogeny, biogeography, and biostratigraphy
A new phylogenetic analysis of Anomodontia reveals that “Dicynodon” is polyphyletic, necessitating taxonomic revision at the generic level, and new generic names are established for several species formerly included in DICynodon.
Permian and Triassic Dicynodont (Therapsida: Anomodontia) Faunas of the Luangwa Basin, Zambia: Taxonomic Update and Implications for Dicynodont Biogeography and Biostratigraphy
- K. Angielczyk, J. Steyer, C. Sidor, Roger M. H. Smith, R. Whatley, S. Tolan
- Geography, Environmental Science
Dicynodont fossils were first collected in the Luangwa Basin, Zambia, in the 1920s, but limited detailed study and taxonomic uncertainty have obscured their biostratigraphic utility and their…
Preliminary phylogenetic analysis and stratigraphc congruence of the dicynodont anomodonts (Synapsida: Therapsida)
- K. Angielczyk
- Environmental Science
The Council's Research Committee, University of the Witwatersrand; National Research Foundation (NRF); Palaeo-Anthropology Scientific Trust (PAST); Collections Usage Grant (AMNH); Grant-in-Aid-of…
A New Silesaurid from the Upper Ntawere Formation of Zambia (Middle Triassic) Demonstrates the Rapid Diversification of Silesauridae (Avemetatarsalia, Dinosauriformes)
- B. Peecook, C. Sidor, S. Nesbitt, Roger M. H. Smith, J. Steyer, K. Angielczyk
- Geography, Environmental Science
- 1 September 2013
ABSTRACT Recent discoveries have shown that non-dinosaurian dinosauromorphs were morphologically diverse, globally distributed, and have a stratigraphic range extending into the Upper Triassic.…
Nocturnality in synapsids predates the origin of mammals by over 100 million years
- K. Angielczyk, L. Schmitz
- Biology, Environmental ScienceProceedings of the Royal Society B: Biological…
- 22 October 2014
Recognizing the complexity of diel activity patterns in non-mammalian synapsids is an important step towards a more nuanced picture of the evolutionary history of behaviour in the synapsid clade.