ArticleNature communications2020
Reptile-like physiology in Early Jurassic stem-mammals.
Article in Nature communications, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.
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29 citing papers in PubMed, 54 citations in OpenAlex.
- A perspective from the Mesozoic: Evolutionary changes of the mammalian skull and their influence on feeding efficiency and high-frequency hearing.Anatomical record (Hoboken, N.J. : 2007) · 2026Review
- Synchrotron imaging reveals diversity in archosauromorph growth strategies by the end of the early Triassic.iScience · 2026Article
- Reading hominin life history in fossil bones and teeth: methods to test hypotheses regarding its evolution.Biological reviews of the Cambridge Philosophical Society · 2026Review
- Life history of a new Paraceratheriid from the Early Oligocene of Northwest China.Scientific reports · 2025Article
- Pseudosuchian thermometabolism: A review of the past two decades.Anatomical record (Hoboken, N.J. : 2007) · 2025Review
- Integrative paleophysiology of the metriorhynchoid Pelagosaurus typus (Pseudosuchia, Thalattosuchia).Anatomical record (Hoboken, N.J. : 2007) · 2025Article
- Article
- The origins of mammal growth patterns during the Jurassic mammalian radiation.Science advances · 2024Article
- New evidence from high-resolution computed microtomography of Triassic stem-mammal skulls from South America enhances discussions on turbinates before the origin of Mammaliaformes.Scientific reports · 2024Article
- Global latitudinal gradients and the evolution of body size in dinosaurs and mammals.Nature communications · 2024Article
- Agency as an Inherent Property of Living Organisms.Biological theory · 2024Review
- Article
- Evolution, diversification and function of the maternal-infant dyad in mammalian feeding.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023Article
- Spatiotemporal monitoring of hard tissue development reveals unknown features of tooth and bone development.Science advances · 2023Article
- High-energy synchrotron-radiation-based X-ray micro-tomography enables non-destructive and micro-scale palaeohistological assessment of macro-scale fossil dinosaur bones.Journal of synchrotron radiation · 2023Article
- Synchrotron X-ray Studies of the Structural and Functional Hierarchies in Mineralised Human Dental Enamel: A State-of-the-Art Review.Dentistry journal · 2023Review
- On taxonomic issues, ontogenetic series and tooth replacement. Comments on Diphyodont tooth replacement of Brasilodon-A late Triassic eucynodont that challenges the time of origin of mammals by Cabreira et al.Journal of anatomy · 2023Article
- Diphyodont tooth replacement of Brasilodon-A Late Triassic eucynodont that challenges the time of origin of mammals.Journal of anatomy · 2022Article
- The origin of placental mammal life histories.Nature · 2022Article
- Revisiting life history and morphological proxies for early mammaliaform metabolic rates.Nature communications · 2022Article
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Authors and funding
20 authors at 9 institutions in 5 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Despite considerable advances in knowledge of the anatomy, ecology and evolution of early mammals, far less is known about their physiology. Evidence is contradictory concerning the timing and fossil groups in which mammalian endothermy arose. To determine the state of metabolic evolution in two of the earliest stem-mammals, the Early Jurassic Morganucodon and Kuehneotherium, we use separate proxies for basal and maximum metabolic rate. Here we report, using synchrotron X-ray tomographic imaging of incremental tooth cementum, that they had maximum lifespans considerably longer than comparably sized living mammals, but similar to those of reptiles, and so they likely had reptilian-level basal metabolic rates. Measurements of femoral nutrient foramina show Morganucodon had blood flow rates intermediate between living mammals and reptiles, suggesting maximum metabolic rates increased evolutionarily before basal metabolic rates. Stem mammals lacked the elevated endothermic metabolism of living mammals, highlighting the mosaic nature of mammalian physiological evolution.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.