Ancient arthropod fossil reshapes view of late Cambrian biodiversity
A 500-million-year-old arthropod from Québec, Magnicornaspis garwoodi, with two forward-projecting head spines, expands knowledge of rare corcoraniids in the late Cambrian. Found in the Rivière-du-Loup Formation and long stored in the Smithsonian, the specimen suggests the Furongian gap may reflect sampling bias rather than a true biodiversity collapse, implying diverse ecosystems persisted in the late Cambrian and that many fossils remain undiscovered in under-explored rocks and museum collections.