Rhynchonellata - Athyridida - Athyrididae
Alternative spelling: Spirigera
Parent taxon: Athyris according to G. Astre 1934
See also Sykora et al. 1998
Sister taxa: Athyris (Cliothyris), Athyris (Seminula), Athyris ambiguaeformis, Athyris angelica, Athyris angulata, Athyris bisulcata, Athyris bradyensis, Athyris cestriensis, Athyris concentrica, Athyris damesi, Athyris globularis, Athyris goniocolpos, Athyris lamellosa, Athyris mirabilis, Athyris persinuata, Athyris plicatiformis, Athyris spiriferoides, Athyris subquadrata, Athyris xetra
Subtaxa: Spirigera (Didymospira) Spirigera borovacensis Spirigera forojulensis Spirigera kaihikuana Spirigera kittlii Spirigera manzavinii Spirigera manzavinioides Spirigera milesi Spirigera misolica Spirigera monticola Spirigera oppelii Spirigera pseudodielasma Spirigera schloenbachii Spirigera sellaris Spirigera siljanensis Spirigera stoliczkai Spirigera subindistincta Spirigera sufflata Spirigera tricupii Spirigera wreyi
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Triassic of Bosnia and Herzegovina (10 collections), Canada (1: British Columbia), East Timor (1), Hungary (3), India (5), Indonesia (5), Italy (5), Nepal (1), New Zealand (6), Serbia and Montenegro (1), Slovakia (1), Thailand (1), Turkey (1), United States (2: California, Nevada)
• Permian of Indonesia (3)
• Carboniferous of India (1), United States (1: California)
Total: 48 collections including 52 occurrences