Bathydiscus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Botomian stage.
Distribution Bathydiscus is known from the Lower Cambrian of the United States (unnamed formation, East Chatham Quad, Columbia County, New York State ), and of Canada (Newfoundland).Whittington, H. B. et al. Part O, Treatise on Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997
Ecology Bathydiscus occurs in association with other Weymouthiidae (Acidiscus, Acimetopus, Analox, Bolboparia, Leptochilodiscus, Serrodiscus), Calodiscus, several species of Olenellus and Bonnia (Dorypygidae).
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