The earliest Laurasian unionoids? Freshwater bivalves from the Middle Triassic of Devon, southern UK

Autor:	Jonathan D. Radley, Robert A. Coram
Rok vydání:	2020
Předmět:	Unionoida Extinction event biology Early Triassic Paleontology Geology biology.organism_classification Freshwater ecosystem Otter Laurasia biology.animal Alluvium
Zdroj:	Proceedings of the Geologists' Association. 131:60-66
ISSN:	0016-7878
DOI:	10.1016/j.pgeola.2019.11.001
Popis:	Bivalve moulds and putative resting traces are recorded from a mudstone unit of lacustrine origin close to the top of the mainly alluvial Otter Sandstone Formation (Anisian, Middle Triassic) near Sidmouth, south-east Devon, southern UK. The bivalves resemble members of the Triassic – Recent Order Unionoida, to which they are tentatively attributed. Previous records of Early and Middle Triassic freshwater bivalves are largely Gondwanan. Our record provides evidence for a significant mid-Triassic radiation into Laurasia, as freshwater ecosystems recovered after the end-Permian mass extinction, and through the ensuing Early Triassic environmental crises.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::aa465bae9cbf3338484b10a589633ec6 https://doi.org/10.1016/j.pgeola.2019.11.001 Zobrazit plný text záznamu Full Text from ScienceDirect