Trace fossils from the Meishucun section of South China: revisiting ichnotaxonomy, behavioural diversification and ecosystem engineering from a key Ediacaran–Cambrian succession

Papers in Palaeontology, Journal Year: 2025, Volume and Issue: 11(2)

Published: March 1, 2025

Abstract The Ediacaran–Cambrian transition was a time of profound geobiological revolution and sedimentary change in Earth's history, including arguably the most dramatic evolutionary radiation remarkable biotic replacement. complex feedback between diversification metazoans their ecological interactions, especially after extinction latest Ediacaran biota, is still debated. Here, we systematically studied trace fossil content succession from Meishucun section South China. A total 20 ichnogenera comprising 31 ichnospecies have been identified succession. occurrence Treptichnus pedum Lower Phosphate Zhongyicun Member reinforces importance this ichnotaxon as an indicator boundary. Our critical review record key shows that increases ichnodiversity, ichnodisparity, degree bioturbation, bioturbation depth were accompanied by modes life ecosystem engineering throughout early Cambrian. stepped increased ichnodiversity ichnodisparity transition, simple morphologies to branching Fortunian, finally horizontal looping trails suspension feeding burrows Cambrian Stage 2, paralleled shift information agronomic revolution. hike intensity occurred during 2 may resulted increase bioirrigation levels conducive further deepening redox discontinuity surface.

Language: Английский

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New morphological structures of Priapulus caudatus, Lamarck 1816 (Priapulida) and analysis of homologous characters across macroscopic priapulids

Zoologischer Anzeiger, Journal Year: 2024, Volume and Issue: 312, P. 135 - 152

Published: Aug. 26, 2024

Language: Английский

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Himatiichnus mangano igen. et isp. nov., a scalidophoran trace fossil from the late Ediacaran of Namibia

Royal Society Open Science, Journal Year: 2024, Volume and Issue: 11(10)

Published: Oct. 1, 2024

Himatiichnus mangano igen. et isp. nov., a new trace fossil from the late Ediacaran Huns Member of Urusis Formation, southern Namibia, comprises intertwining tubes exhibiting dual lineation patterns and reminiscent both modern early Cambrian examples priapulid worm burrows. These similarities support interpretation total-group scalidophoran tracemaker for H. , thus providing direct evidence first appearance date Scalidophora in ca 539 Ma. This material is indicative presence scalidophorans below boundary supports inference lengthy Precambrian fuse explosion.

Language: Английский

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Bioturbators as ecosystem engineers in space and time

Palaeontology, Journal Year: 2024, Volume and Issue: 67(6)

Published: Nov. 1, 2024

Abstract Biogenic sedimentary structures offer a unique perspective for understanding the role of biosphere in interaction with other Earth subsystems and building up our planet. The record their ancient equivalents provides wealth information reconstructing bioturbators as ecosystem engineers using multiple ichnological proxies methods. In this study, we present an overview how bioturbation has worked across broad range spatial temporal scales from engineering. Comprehensive systematic datasets allow analyses at regional global extents, especially over long where sampling intensity rock biases can be considered. Our results underscore significance Cambrian Explosion establishment modern‐style shallow marine ecosystems Ordovician Radiation deep counterparts, well continuous impact during Palaeozoic terrestrialization. Comparable rest Phanerozoic have not yet been compiled. However, preliminary indicates that colonization ultra‐deep tiers, rise to prominence regenerators, increased burrowing efficiency, compartmentalization endobenthic ecospace, were products Mesozoic Marine Revolution. trace‐fossil offers hard data evaluate driving force re‐structuring key factor geobiological cycles. Models assessing these fundamental issues should rooted empirically different scales, both autoecological synecological macroecological, making best possible use rich rapidly developing toolbox.

Language: Английский

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Magnetic susceptibility cyclostratigraphy of the lower Schwarzrand Subgroup in southern Namibia refines temporal calibration of late Ediacaran bilaterian radiation

Global and Planetary Change, Journal Year: 2024, Volume and Issue: unknown, P. 104668 - 104668

Published: Dec. 1, 2024

Language: Английский

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The largest complex burrow system from the early Cambrian of Sweden, probably made by priapulids in response to tidal currents

Lethaia, Journal Year: 2024, Volume and Issue: 57(3), P. 1 - 12

Published: Sept. 4, 2024

Language: Английский

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