†suborder Anazygidina Copper 1996 (lamp shell)

Rhynchonellata - Atrypida

Parent taxon: Atrypida according to A. Williams et al. 2002

Sister taxa: Antelocoelia, Atrypidina, Davidsoniidina, Lissatrypidina, Undithyrella, Wutubulakia

Subtaxa: Anazygoidea

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Ecology: stationary epifaunal suspension feeder

Distribution:

• Silurian of Canada (11: New Brunswick, Northwest Territories, Nunavut, Quebec, Québec collections), China (5), Estonia (3), Lithuania (3), Mongolia (7), the Russian Federation (9), the United Kingdom (3), United States (1: Nevada)

• Ordovician to Silurian of Canada (2: Québec)

• Ordovician of Australia (21), Belgium (2), Canada (116: British Columbia, Manitoba, Northwest Territories, Nunavut, Ontario, Quebec, Québec), China (16), the Czech Republic (2), Estonia (5), Latvia (1), Lithuania (1), Norway (4), the Russian Federation (2), the United Kingdom (28), United States (980: Alabama, Alaska, California, Colorado, Georgia, Idaho, Illinois, Iowa, Indiana, Iowa, Kentucky, Maryland, Michigan, Minnesota, Missouri, Nevada, New Mexico, New York, Ohio, Pennsylvania, Pennsylvania and Virginia, Tennessee, Texas, Virginia, Wyoming)

• Llandeilo of China (1)

• Whiterockian of United States (2: Nevada)

Total: 1225 collections including 1326 occurrences

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