Ostracoda - Hollinocopida - Eurychilinidae
Parent taxon: Eurychilinacea according to M. Mohibullah et al. 2013
See also Benson et al. 1961 and Henningsmoen 1953
Sister taxa: Bolbinidae, Oepikellidae
Subtaxa: Apatochilina Ballardina Bicornellina Chilobolbininae Eurychilininae Nodambichilina Opikella Tsitrella
Type: Eurychilina
Ecology: epifaunal
Distribution:
• Silurian of Canada (2: Quebec collections), the Russian Federation (2), United States (3: New York, Oklahoma)
• Dobrotivian of Portugal (1)
• Uhaku of the Russian Federation (1), Sweden (3)
• Chazyan of Canada (9: Northwest Territories, Quebec), United States (31: New York)
• Whiterockian of United States (11: Nevada)
• Ordovician of Canada (26: Northwest Territories, Nunavut, Ontario, Quebec, Québec), China (2), Estonia (1), Norway (10), the Russian Federation (20), Sweden (28), United States (41: Alaska, Indiana, Iowa, Minnesota, Nevada, Oklahoma, Tennessee, Virginia, Wisconsin)
Total: 191 collections including 275 occurrences