†subfamily Quadratiinae Lazarev 1989 (lamp shell)
Strophomenata - Productida - Araksalosiidae
Parent taxon: Araksalosiidae according to A. Williams et al. 2000
Sister taxa: Araksalosiinae, Donalosiinae, Rhytialosiinae
Subtaxa: Chonetipustula Cyphotalosia Plicaea Plicatiferina Quadratia
Type: Quadratia
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Permian of China (1 collection)
• Carboniferous of Australia (2), Bosnia and Herzegovina (1), Canada (2: Nunavut), the Czech Republic (1), Germany (2), Ireland (1), the United Kingdom (3), United States (39: Alaska, California, Idaho, Iowa, Kentucky, Missouri, Nevada, Tennessee, Texas, Utah)
• Devonian of Canada (7: Manitoba), Germany (4), Uzbekistan (1), Vietnam (1)
Total: 65 collections including 71 occurrences