ArticleScientific reports2020
3D hindlimb joint mobility of the stem-archosaur Euparkeria capensis with implications for postural evolution within Archosauria.
Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.
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34 citing papers in PubMed.
- Functional morphology and biomechanics of the locomotor apparatus in the large Late Triassic carnivore Postosuchus kirkpatricki (Archosauria: Rauisuchidae).Journal of anatomy · 2026Article
- Digital range of motion analysis is sensitive to subjective steps in joint model construction.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
- Hindlimb functional morphology and locomotor biomechanics of the small Late Triassic pseudosuchian reptile Gracilisuchus stipanicicorum (Archosauria: Gracilisuchidae).Journal of anatomy · 2026Article
- First forelimb reconstruction and range of motion assessment of the Late Cretaceous dinosaurPeerJ · 2026Article
- Soft tissue constraints on joint mobility in the avian shoulder.The Journal of experimental biology · 2025Article
- Biomechanical simulations of hindlimb function inScience advances · 2025Article
- Hindlimb biomechanics of Lagosuchus talampayensis (Archosauria, Dinosauriformes), with comments on skeletal morphology.Journal of anatomy · 2025Article
- Biomechanical modeling of musculoskeletal function related to the terrestrial locomotion of Riojasuchus tenuisceps (Archosauria: Ornithosuchidae).Anatomical record (Hoboken, N.J. : 2007) · 2025Article
- Comparative muscle anatomy of the anuran pelvis and hindlimb in relation to locomotor mode.Journal of anatomy · 2024Article
- Late acquisition of erect hindlimb posture and function in the forerunners of therian mammals.Science advances · 2024Article
- Hindlimb and pelvic anatomy of Caiman yacare (Archosauria, Pseudosuchia): Myology and osteological correlates with emphasis on lower leg and autopodial musculature.Journal of anatomy · 2024Article
- Articular surface interactions distinguish dinosaurian locomotor joint poses.Nature communications · 2024Article
- Locomotor and postural diversity among reptiles viewed through the prism of femoral microanatomy: Palaeobiological implications for some Permian and Mesozoic taxa.Journal of anatomy · 2023Article
- Modern three-dimensional digital methods for studying locomotor biomechanics in tetrapods.The Journal of experimental biology · 2023Review
- Inner workings of the alligator ankle reveal the mechanistic origins of archosaur locomotor diversity.Journal of anatomy · 2023Article
- Article
- Quantitative biomechanical assessment of locomotor capabilities of the stem archosaurRoyal Society open science · 2023Article
- Article
- Multi-Joint Analysis of Pose Viability Supports the Possibility of Salamander-Like Hindlimb Configurations in the Permian Tetrapod Eryops megacephalus.Integrative and comparative biology · 2022Article
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Abstract
Triassic archosaurs and stem-archosaurs show a remarkable disparity in their ankle and pelvis morphologies. However, the implications of these different morphologies for specific functions are still poorly understood. Here, we present the first quantitative analysis into the locomotor abilities of a stem-archosaur applying 3D modelling techniques. μCT scans of multiple specimens of Euparkeria capensis enabled the reconstruction and three-dimensional articulation of the hindlimb. The joint mobility of the hindlimb was quantified in 3D to address previous qualitative hypotheses regarding the stance of Euparkeria. Our range of motion analysis implies the potential for an erect posture, consistent with the hip morphology, allowing the femur to be fully adducted to position the feet beneath the body. A fully sprawling pose appears unlikely but a wide range of hip abduction remained feasible-the hip appears quite mobile. The oblique mesotarsal ankle joint in Euparkeria implies, however, a more abducted hindlimb. This is consistent with a mosaic of ancestral and derived osteological characters in the hindlimb, and might suggest a moderately adducted posture for Euparkeria. Our results support a single origin of a pillar-erect hip morphology, ancestral to Eucrocopoda that preceded later development of a hinge-like ankle joint and a more erect hindlimb posture.
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