Artiopoda - Agnostida - Weymouthiidae
Parent taxon: Eodiscida according to J. M. Adrain 2011
See also Whittington et al. 1997
Sister taxa: Calodiscidae, Eodiscidae, Hebediscidae, Pagetiidae, Tsunyidiscidae, Yukoniidae
Subtaxa: Abakolia Acidiscus Acimetopus Analox Bathydiscus Bolboparia Chelediscus Cobboldites Leptochilodiscus Litometopus Mallagnostus Meniscuchus Morocconus Ninadiscus Oodiscus Pseudocobboldia Runcinodiscus Semadiscus Serrodiscus Stigmadiscus Tannudiscus Weymouthia
Ecology: slow-moving epifaunal detritivore
Distribution:
• Cambrian of Australia (4 collections), Canada (3: Newfoundland and Labrador, Nova Scotia, Yukon), China (5), Greenland (4), Kazakhstan (1), Morocco (4), Norway (2), Poland (2), the Russian Federation (6), Spain (1), Svalbard and Jan Mayen (2), the United Kingdom (5), United States (7: Alaska, Massachusetts, New York)
• Solvan of Morocco (2), the Russian Federation (1)
• Caerfai of United States (1: New York)
Total: 50 collections including 95 occurrences