ArticleProceedings. Biological sciences2023
Cambrian 'sap-sucking' molluscan radulae among small carbonaceous fossils (SCFs).
Article in Proceedings. Biological sciences, 2023. 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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6 citing papers in PubMed, 12 citations in OpenAlex.
- 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
- Changes in metazoan functional diversity across the Cambrian Radiation and the first Phanerozoic mass extinction: the Cambrian Sinsk Event.Proceedings. Biological sciences · 2025Article
- 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
- Dawn of diverse shelled and carbonaceous animal microfossils at ~ 571 Ma.Scientific reports · 2024Article
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1 author at 1 institution in 1 country.
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Abstract
Molluscs have produced an extensive fossil record, owing to the prevalence of robust biomineralized shells among this clade. By contrast, most other components of molluscan anatomy are seldom preserved. Importantly, little is known of the evolutionary history of the unique molluscan feeding apparatus-the radula. A scarcity of fossil radulae has hampered our understanding of the ancestral condition, and of the dietary ecology of early molluscs. The handful of known fossil radulae all point to early molluscs as simple deposit feeders that obtained food via rasping or scraping. This study reports microscopic radulae preserved as 'small carbonaceous fossils' (SCFs) from Cambrian (Stage 4-Wuliuan, approximately 514-504.5 Ma) strata of Sweden. These rare fossil radulae offer novel insights into the feeding anatomy and ecology of early molluscs. Each radula comprises a uniseriate arc of (≤10) blade-shaped teeth, fringed by a slicing keel. This distinctive morphology is strikingly convergent with the radulae of extant sacoglossan heterobranch gastropods-such radulae are specially adapted for piercing the cell walls of green algal tissues to enable suctorial feeding on the cytoplasm contents. Discovery of analogous Cambrian radulae demonstrates this specialized form of herbivory had already evolved among molluscs more than half a billion years ago.
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