New keratose sponges after the end-Permian extinction provide insights into biotic recoveries.
Geobiology
; 22(1): e12582, 2024.
Article
in En
| MEDLINE
| ID: mdl-38385600
ABSTRACT
We challenge the prevailing view that the end-Permian extinction impeded the Triassic evolution of sponges. Here, we report a deep-water community dominated by abundant keratose sponges in the lowest Triassic strata from Southwest China. The sponge fossils occur as dark elliptical imprints in mudstone with distinct oscula on their tops. The structure of preserved fibers suggests closest affinity with the extant Dictyoceratida, an aspiculate demosponge. The exceptional preservation plays a crucial role in retaining their exquisite structures. Sedimentary, taphonomic, pyrite framboid, and trace elemental analyses indicate that the sponges proliferated in an oxygen-poor habitat, demonstrating the high tolerance of sponges to severe conditions. Sponge proliferation is a signal of environmental upheaval but they also stabilized the ecosystem, driving the first phase of biotic recovery after the end-Permian extinction.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Trace Elements
/
Keratosis
Limits:
Humans
Country/Region as subject:
Asia
Language:
En
Journal:
Geobiology
Journal subject:
BIOLOGIA
Year:
2024
Document type:
Article
Affiliation country: