ArticleBMC evolutionary biology2016
Unappreciated diversification of stem archosaurs during the Middle Triassic predated the dominance of dinosaurs.
Article in BMC evolutionary biology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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Who cites it
24 citing papers in PubMed.
- Synchrotron imaging reveals diversity in archosauromorph growth strategies by the end of the early Triassic.iScience · 2026Article
- A new eucrocopodan archosauriform from the Middle Triassic of southern Brazil and the phylogeny of Euparkeriidae.Scientific reports · 2026Article
- The smallest tetrapod from the Middle Triassic of South America: a new procolophonoid parareptile from the Ladinian of Southern Brazil.Scientific reports · 2026Article
- A new pseudosuchian from the Favret Formation of Nevada reveals that archosauriforms occupied coastal regions globally during the Middle Triassic.Biology letters · 2024Article
- A new small-sized predatory pseudosuchian archosaur from the Middle-Late Triassic of Southern Brazil.Scientific reports · 2024Article
- Locomotion and the early Mesozoic success of Archosauromorpha.Royal Society open science · 2024Article
- Osteohistological insight into the growth dynamics of early dinosaurs and their contemporaries.PloS one · 2024Article
- A new Middle Triassic (Ladinian) trilophosaurid stem-archosaur from Germany increases diversity and temporal range of this clade.Royal Society open science · 2023Article
- Re-description of the early Triassic diapsid Palacrodon from the lower Fremouw formation of Antarctica.Journal of anatomy · 2022Article
- Osteology and relationships of Revueltosaurus callenderi (Archosauria: Suchia) from the Upper Triassic (Norian) Chinle Formation of Petrified Forest National Park, Arizona, United States.Anatomical record (Hoboken, N.J. : 2007) · 2022Review
- Functional and ecomorphological evolution of orbit shape in mesozoic archosaurs is driven by body size and diet.Communications biology · 2022Article
- Femoral specializations to locomotor habits in early archosauriforms.Journal of anatomy · 2022Article
- A new pseudosuchian archosaur,Royal Society open science · 2022Article
- A remarkable group of thick-headed Triassic Period archosauromorphs with a wide, possibly Pangean distribution.Journal of anatomy · 2021Article
- Anatomy, ontogeny, and evolution of the archosaurian respiratory system: A case study on Alligator mississippiensis and Struthio camelus.Journal of anatomy · 2021Article
- Article
- 3D hindlimb joint mobility of the stem-archosaur Euparkeria capensis with implications for postural evolution within Archosauria.Scientific reports · 2020Article
- The cranial morphology ofPeerJ · 2020Article
- Article
- The rise of the ruling reptiles and ecosystem recovery from the Permo-Triassic mass extinction.Proceedings. Biological sciences · 2018Article
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5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundArchosauromorpha originated in the middle-late Permian, radiated during the Triassic, and gave rise to the crown group Archosauria, a highly successful clade of reptiles in terrestrial ecosystems over the last 250 million years. However, scientific attention has mainly focused on the diversification of archosaurs, while their stem lineage (i.e. non-archosaurian archosauromorphs) has often been overlooked in discussions of the evolutionary success of Archosauria. Here, we analyse the cranial disparity of late Permian to Early Jurassic archosauromorphs and make comparisons between non-archosaurian archosauromorphs and archosaurs (including Pseudosuchia and Ornithodira) on the basis of two-dimensional geometric morphometrics.
resultsOur analysis recovers previously unappreciated high morphological disparity for non-archosaurian archosauromorphs, especially during the Middle Triassic, which abruptly declined during the early Late Triassic (Carnian). By contrast, cranial disparity of archosaurs increased from the Middle Triassic into the Late Triassic, declined during the end-Triassic extinction, but re-expanded towards the end of the Early Jurassic.
conclusionsOur study indicates that non-archosaurian archosauromorphs were highly diverse components of terrestrial ecosystems prior to the major radiation of archosaurs, including dinosaurs, while disparity patterns of the Ladinian and Carnian indicate a gradual faunal replacement of stem archosaurs by the crown group, including a short interval of partial overlap in morphospace during the Ladinian.
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