Tagasi otsingusse
Yang et al., 2025

Exceptionally preserved burrows of ichnogenus Asterosoma from the lower Silurian of south China: systematic ichnology, palaeoecology and implications for ecosystem recovery following the late Ordovician mass extinction

Yang, L., Feng, X., Zheng, Z., Zheng, Z., Chen, H., Chen, Z.
DOI
DOI10.1144/jgs2023-202
Aasta2025
AjakiriJournal of the Geological Society
Köide182
Number2
Tüüpartikkel ajakirjas
Keelinglise
Id50286

Abstrakt

Exceptionally preserved complex burrows are described from the lower Silurian of South China, and they are identified as Asterosoma ludwigae Schlirf, 2000, which is characterized by the straight or curved bulbs that bud from an axial, vertical or horizontal, cylindrical burrow following a dichotomous or fan-like pattern. Striae and concentric lamination of burrow fills indicate that the special mining behaviour of the tracemaker reflects appendages that imprinted the burrow wall during their activities, speculating that polychaetes or holothuroides could be strong candidates of the tracemaker of A . ludwigae. Abundant organic-matter-rich peloids and muddy matrix in burrow fills may consist of tracemaker's secretions or excrement. Abundant extracellular polymeric substance (EPS) and clay minerals in filling sediment indicate the possible presence of microbes, implying that Asterosoma is not a simple fodinichnion, but rather created a beneficial symbiosis between tracemakers and microbes in burrows. Phanerozoic spatiotemporal distributions indicate that Asterosoma was distributed in broad habitats from deep sea to delta, but showed a strong preference for the shallow sea. Compilation of new ichnofossils and previously reported ichnotaxa from South China reveals that ichnospecies richness, burrow size and complexity all increased significantly during the late Aeronian, indicating a full recovery after the late Ordovician mass extinction.

Viimati muudetud: 2.7.2025
KIKNATARCSARVTÜ Loodusmuuseumi geokogudEesti Loodusmuuseumi geoloogia osakond
Leheküljel leiduvad materjalid on enamasti kasutamiseks CC BY-SA litsensi alusel, kui pole teisiti määratud.
Portaal on osaks teadustaristust ning infosüsteemist SARV, majutab TalTech.
Open Book ikooni autor Icons8.