ArticleScience advances2024
Late acquisition of erect hindlimb posture and function in the forerunners of therian mammals.
Article in Science advances, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Femoral neck anteversion among five canid taxa.Anatomical record (Hoboken, N.J. : 2007) · 2026Article
- Evolutionary diversification via modular compliance for self-reconfigurable continuum robots.Science advances · 2026Article
- Hindlimb functional morphology and locomotor biomechanics of the small Late Triassic pseudosuchian reptile Gracilisuchus stipanicicorum (Archosauria: Gracilisuchidae).Journal of anatomy · 2026Article
- Scaling of internal joint distance in the elbow of small- to medium-sized mammals: Implications for range of motion analyses.Journal of anatomy · 2026Article
- Biomechanical simulations of hindlimb function inScience advances · 2025Article
- Adaptive landscapes unveil the complex evolutionary path from sprawling to upright forelimb function and posture in mammals.PLoS biology · 2025Article
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Authors and funding
2 authors.
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Abstract
The evolutionary transition from early synapsids to therian mammals involved profound reorganization in locomotor anatomy and function, centered around a shift from "sprawled" to "erect" limb postures. When and how this functional shift was accomplished has remained difficult to decipher from the fossil record alone. Through biomechanical modeling of hindlimb force-generating performance in eight exemplar fossil synapsids, we demonstrate that the erect locomotor regime typifying modern therians did not evolve until just before crown Theria. Modeling also identifies a transient phase of increased performance in therapsids and early cynodonts, before crown mammals. Further, quantifying the global actions of major hip muscle groups indicates a protracted juxtaposition of functional redeployment and conservatism, highlighting the intricate interplay between anatomical reorganization and function across postural transitions. We infer a complex history of synapsid locomotor evolution and suggest that major evolutionary transitions between contrasting locomotor behaviors may follow highly nonlinear trajectories.
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