ArticleProceedings. Biological sciences2021
Were all trilobites fully marine? Trilobite expansion into brackish water during the early Palaeozoic.
Article in Proceedings. Biological sciences, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 29 citations in OpenAlex.
- Ediacaran-Cambrian paleosols of Nevada and California.PloS one · 2025Article
- Convergent Adaptation of True Crabs (Decapoda: Brachyura) to a Gradient of Terrestrial Environments.Systematic biology · 2024Article
- Review
- Assessing the expansion of the Cambrian Agronomic Revolution into fan-delta environments.Scientific reports · 2022Article
- Contrasting Early Ordovician assembly patterns highlight the complex initial stages of the Ordovician Radiation.Scientific reports · 2022Article
- Ostracods had colonized estuaries by the late Silurian.Biology letters · 2021Article
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Trilobites, key components of early Palaeozoic communities, are considered to have been invariably fully marine. Through the integration of ichnological, palaeobiological, and sedimentological datasets within a sequence-stratigraphical framework, we challenge this assumption. Here, we report uncontroversial trace and body fossil evidence of their presence in brackish-water settings. Our approach allows tracking of some trilobite groups foraying into tide-dominated estuaries. These trilobites were tolerant to salinity stress and able to make use of the ecological advantages offered by marginal-marine environments migrating up-estuary, following salt wedges either reflecting amphidromy or as euryhaline marine wanderers. Our data indicate two attempts of landward exploration via brackish water: phase 1 in which the outer portion of estuaries were colonized by olenids (Furongian-early late Tremadocian) and phase 2 involving exploration of the inner to middle estuarine zones by asaphids (Dapingian-Darriwilian). This study indicates that tolerance to salinity stress arose independently among different trilobite groups.
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