†family Protozygidae Copper 1986 (lamp shell)
Rhynchonellata - Atrypida - Protozygidae
Parent taxon: Protozygoidea according to A. Williams et al. 2002
See also Zhan and Jin 2005
Sister taxon: Cyclospiridae
Subtaxa: Manespira Protozyga Xysila
Type: Protozyga
Ecology: stationary epifaunal suspension feeder
Distribution:
• Silurian of the United Kingdom (3 collections)
• Chazyan of United States (1: Virginia)
• Whiterockian of United States (1: Nevada)
• Ordovician of Australia (20), Canada (3: Quebec), Myanmar (1), Norway (1), the United Kingdom (6), United States (32: Georgia, Illinois, Iowa, Kentucky, Minnesota, Missouri, New York, Oklahoma, Pennsylvania, Tennessee, Virginia, Wisconsin)
Total: 68 collections including 70 occurrences