Rhynchonellata - Atrypida - Atrypinidae
Full reference: A. J. Boucot and J. G. Johnson. 1967. Silurian and Upper Ordovician atrypids of the genera Plectatrypa and Spirigerina. Norsk Geoliska Tidsskrift 47:79-101
Parent taxon: Spirigerina according to Boucot and Johnson 1967
Sister taxa: Spirigerina copperi, Spirigerina marginalis, Spirigerina quinquecostata, Spirigerina supramarginalis
Subtaxa: Spirigerina (Eospirigerina) gaspeensis
Ecology: stationary epifaunal suspension feeder
Distribution:
• Silurian of Canada (1: Ontario collection), Estonia (1), Norway (13), the United Kingdom (3), Venezuela (1)
• Ordovician to Silurian of Norway (1)
• Ordovician of Canada (10: Quebec, Québec), the Russian Federation (1), the United Kingdom (1)
Total: 32 collections each including a single occurrence