Bathydiscus

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 42.4°N, -73.5°W), and of Canada (Newfoundland).

Ecology
Bathydiscus  occurs in association with other Weymouthiidae (Acidiscus, Acimetopus, Analox, Bolboparia, Leptochilodiscus, Serrodiscus), Calodiscus, several species of Olenellus and Bonnia (Dorypygidae).