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 ), 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).