ArticleProceedings of the National Academy of Sciences of the United States of America2012
Exceptionally preserved crustaceans from western Canada reveal a cryptic Cambrian radiation.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.
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40 citing papers in PubMed.
- Two exceptionally preserved biotas from North Dakota reveal cryptic Ordovician shelf ecologies.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Early Ordovician sea scorpions from Morocco suggest Cambrian origins and main diversification of Eurypterida.Proceedings. Biological sciences · 2025Article
- The chitin raft hypothesis for the colonization of the open ocean by cyanobacteria.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025Review
- Evolutionary escalation in an exceptionally preserved Cambrian biota from the Grand Canyon (Arizona, USA).Science advances · 2025Article
- Cambrian carbonaceous protoconodonts and the early fossil record of the Chaetognatha.Proceedings. Biological sciences · 2025Article
- A microscopic Burgess Shale: small carbonaceous fossils from a deeper water biota and the distribution of Cambrian non-mineralized faunas.Proceedings. Biological sciences · 2025Article
- The CambrianProceedings. Biological sciences · 2024Article
- Dawn of diverse shelled and carbonaceous animal microfossils at ~ 571 Ma.Scientific reports · 2024Article
- Article
- A mid-Cambrian tunicate and the deep origin of the ascidiacean body plan.Nature communications · 2023Article
- Chitin utilization by marine picocyanobacteria and the evolution of a planktonic lifestyle.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Cambrian 'sap-sucking' molluscan radulae among small carbonaceous fossils (SCFs).Proceedings. Biological sciences · 2023Article
- Functional importance of the mandibular skeleto-muscular system in the bivalved arthropod Heterocypris incongruens (Crustacea, Ostracoda, Cyprididae).Die Naturwissenschaften · 2022Article
- Whole-Genome Phylogenetic Reconstruction as a Powerful Tool to Reveal Homoplasy and Ancient Rapid Radiation in Waterflea Evolution.Systematic biology · 2022Article
- Ostracods had colonized estuaries by the late Silurian.Biology letters · 2021Article
- Vertically migratingProceedings. Biological sciences · 2021Article
- The complete mitogenome of the fairy shrimpMitochondrial DNA. Part B, Resources · 2020Article
- Phylogeny and Biogeography of Spinicaudata (Crustacea: Branchiopoda).Zoological studies · 2020Article
- Fossil and Modern Clam Shrimp (Branchiopoda: Spinicaudata, Laevicaudata): The World's First Clam Shrimp Symposium and a Celebration of Brian V. Timms.Zoological studies · 2020Article
- New suspension-feeding radiodont suggests evolution of microplanktivory in Cambrian macronekton.Nature communications · 2018Article
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Abstract
The early history of crustaceans is obscured by strong biases in fossil preservation, but a previously overlooked taphonomic mode yields important complementary insights. Here we describe diverse crustacean appendages of Middle and Late Cambrian age from shallow-marine mudstones of the Deadwood Formation in western Canada. The fossils occur as flattened and fragmentary carbonaceous cuticles but provide a suite of phylogenetic and ecological data by virtue of their detailed preservation. In addition to an unprecedented range of complex, largely articulated filtering limbs, we identify at least four distinct types of mandible. Together, these fossils provide the earliest evidence for crown-group branchiopods and total-group copepods and ostracods, extending the respective ranges of these clades back from the Devonian, Pennsylvanian, and Ordovician. Detailed similarities with living forms demonstrate the early origins and subsequent conservation of various complex food-handling adaptations, including a directional mandibular asymmetry that has persisted through half a billion years of evolution. At the same time, the Deadwood fossils indicate profound secular changes in crustacean ecology in terms of body size and environmental distribution. The earliest radiation of crustaceans is largely cryptic in the fossil record, but "small carbonaceous fossils" reveal organisms of surprisingly modern aspect operating in an unfamiliar biosphere.
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