Brachiopoda - Tommotiida - Sunnaginiidae
Full reference: E. Landing. 1984. Skeleton of lapworthellids and the supragenetic classification of tommotiids (Early and Middle Cambrian phosphatic problematica). Journal of Paleontology 58(6):1380-1398
Parent taxon: Tommotiida according to E. Landing 1984
See also Li and Xiao 2004
Sister taxa: Eccentrotheca, Kelanellidae, Kennardiidae, Kulparina, Lapworthellidae, Mitrosagophora, Paterimitra, Porcauricula, Shetlandia, Tannuolinidae, Tommotiidae, Wufengella
Subtaxa: Jaycea Sunnaginia
Type: Sunnaginia
Ecology: facultatively mobile epifaunal suspension feeder
Distribution:
• Cambrian of Australia (3 collections), Canada (12: Nova Scotia), the Russian Federation (7), the United Kingdom (7), United States (4: Massachusetts)
• Placentian of United States (6: Massachusetts)
Total: 39 collections including 40 occurrences