Spatial trends in Ediacaran Bilaterian trails
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916928003506176 |
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| author | Laing, Brittany A. Buatois, Luis A. Mángano, M. Gabriela Brock, Glenn A. Vestrum, Zoe Strotz, Luke C. Koens, Lyndon |
| author_facet | Laing, Brittany A. Buatois, Luis A. Mángano, M. Gabriela Brock, Glenn A. Vestrum, Zoe Strotz, Luke C. Koens, Lyndon |
| contents | The Savannah Hypothesis and the Cambrian Information Revolution invoke the development of spatially heterogeneous resource distribution during the Ediacaran-Cambrian transition as a key driver of infaunalization and sensory evolution of mobile bilaterians, respectively. However, difficulties in detecting historical resource distribution hinders the ability to tests these theories. If external conditions crucial to organism fitness (e.g. nutrient distribution, oxygen availability) became increasingly heterogeneous across the Ediacaran-Cambrian transition, then it follows that benthic organisms dependent on these conditions would demonstrate a similar increase in the spatial variability of their movement trajectories. To investigate Ediacaran resource distribution on the seafloor we examined the morphology of Helminthoidichnites tenuis, a simple unbranched horizontal bilaterian trail, from the Ediacara Member of Southern Australia for spatial trends. Our analysis reveals a as-yet undiscovered variability in the behaviour of the Helminthoidichnites tenuis tracemaker and confirmed heterogeneity in external conditions relevant to the tracemaker in the latest Ediacaran. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2509_01104 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spatial trends in Ediacaran Bilaterian trails Laing, Brittany A. Buatois, Luis A. Mángano, M. Gabriela Brock, Glenn A. Vestrum, Zoe Strotz, Luke C. Koens, Lyndon Populations and Evolution Biological Physics Quantitative Methods The Savannah Hypothesis and the Cambrian Information Revolution invoke the development of spatially heterogeneous resource distribution during the Ediacaran-Cambrian transition as a key driver of infaunalization and sensory evolution of mobile bilaterians, respectively. However, difficulties in detecting historical resource distribution hinders the ability to tests these theories. If external conditions crucial to organism fitness (e.g. nutrient distribution, oxygen availability) became increasingly heterogeneous across the Ediacaran-Cambrian transition, then it follows that benthic organisms dependent on these conditions would demonstrate a similar increase in the spatial variability of their movement trajectories. To investigate Ediacaran resource distribution on the seafloor we examined the morphology of Helminthoidichnites tenuis, a simple unbranched horizontal bilaterian trail, from the Ediacara Member of Southern Australia for spatial trends. Our analysis reveals a as-yet undiscovered variability in the behaviour of the Helminthoidichnites tenuis tracemaker and confirmed heterogeneity in external conditions relevant to the tracemaker in the latest Ediacaran. |
| title | Spatial trends in Ediacaran Bilaterian trails |
| topic | Populations and Evolution Biological Physics Quantitative Methods |
| url | https://arxiv.org/abs/2509.01104 |