Gondwana Research, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 1, 2024
Language: Английский
Palaeontology, Journal Year: 2024, Volume and Issue: 67(4)
Published: July 1, 2024
Abstract The evolutionary rise of powerful new ecosystem engineering impacts is thought to have played an important role in driving waves biospheric change across the Ediacaran–Cambrian transition (ECT; c . 574–538 Ma). Among most heavily cited these bioturbation (organism‐driven sediment disturbance) as activities been shown critical downstream geobiological impacts. In this regard priapulid worms are crucial; trace fossils left by priapulan‐grade animals now recognized appearing shortly before base Cambrian and represent some earliest examples bed‐penetrative bioturbation. Understanding priapulids may thus be key reconstructing drivers ECT. However, rare modern benthic ecosystems, comparatively little known about behaviours associated with their burrowing. Here, we present early results neoichnological experiments focused on understanding worms. We observe for first time a variety burrowing (including formation linked burrow networks long in‐burrow residence times) hinting at larger group than previously thought. Finally, identify means which contribute our tracemakers ECT, they had shaping latest Ediacaran biosphere.
Language: Английский
Citations
6
Nature Ecology & Evolution, Journal Year: 2024, Volume and Issue: 8(7), P. 1238 - 1247
Published: June 12, 2024
Abstract The driving forces behind the evolution of early metazoans are not well understood, but key insights into their ecology and can be gained through ecological analyses in situ, sessile communities Avalon assemblage Ediacaran (~565 million years ago). Community structure is thought to underpinned by epifaunal tiering succession, which we investigate this study 18 communities. Here found that form four distinctive Types irrespective succession processes, instead based on dominance morphologically distinct taxa, prevalent three these Types. Our results consistent with emergent neutrality, whereby ecologically specialized morphologies evolve as a consequence neutral (stochastic or reproductive) processes within niches, leading generalization frond-dominated Type. provide an signature first origination subsequent loss disparate morphologies, probably community restructuring response innovation. This led survival non-tiered frondose generalists over tiered specialists, even youngest assemblages. Such body plans also survive beyond Ediacaran–Cambrian transition, perhaps due greater resilience afforded them alternative strategies.
Language: Английский
Citations
5
Precambrian Research, Journal Year: 2025, Volume and Issue: 419, P. 107702 - 107702
Published: Feb. 1, 2025
Language: Английский
Citations
0
Journal of Earth Science, Journal Year: 2025, Volume and Issue: 36(1), P. 102 - 112
Published: Feb. 1, 2025
Language: Английский
Citations
0
Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2025, Volume and Issue: unknown, P. 112816 - 112816
Published: Feb. 1, 2025
Language: Английский
Citations
0
Papers in Palaeontology, Journal Year: 2025, Volume and Issue: 11(2)
Published: March 1, 2025
Abstract The Jiangchuan biota is a diverse macrofossil assemblage from the Jiucheng Member of Dengying Formation, in uppermost Ediacaran (Sinian) Eastern Yunnan, Southwest China. This well known for its macroalgal fossils preserved as carbonaceous compressions, but co‐occurring taxa have remained poorly documented. Here, we present new discoidal macrofossils biota, which interpret eumetazoan‐grade organisms uncertain affinities. These disc‐like are smooth, well‐defined impressions with tube‐like peripheral zone. Most thick, three‐dimensional ring centrally, possible remnant perioral musculature and innervation. morphology these problematica invites comparison other putative Neoproterozoic medusoids Nanfen Xingmincun Formations Jilin Liaoning areas, Northeast China, enigmatic spiral‐like fossil Eoandromeda octobrachiata Doushantuoian Wenghui Guizhou. Based on shared presence central, dorsally oriented ring‐like structures fossils, speculate that annular nervous system may been widespread among organisms, it might represent plesiomorphic feature Eumetazoa.
Language: Английский
Citations
0
Journal of Palaeogeography, Journal Year: 2025, Volume and Issue: unknown
Published: March 1, 2025
Language: Английский
Citations
0
Current Biology, Journal Year: 2024, Volume and Issue: 34(11), P. 2528 - 2534.e3
Published: May 17, 2024
The rise of animals across the Ediacaran-Cambrian transition marked a step-change in history life, from microbially dominated world to complex macroscopic biosphere we see today.
Language: Английский
Citations
3
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
Citations
3
iScience, Journal Year: 2024, Volume and Issue: 27(2), P. 108823 - 108823
Published: Jan. 9, 2024
The late Ediacaran Jiangchuan biota, from the Dengying Formation in eastern Yunnan, is well-known for its diverse macroalgal fossils, opening a window onto eukaryotic-dominated ecosystems Neoproterozoic of South China. Although multiple lines evidence suggest that metazoans had already evolved by Ediacaran, animal fossils have not yet been formally described this locality. Here, we report putative disc-shaped macrofossil
Language: Английский
Citations
2