†subfamily Theodossiinae Ivanova 1959 (lamp shell)
Rhynchonellata - Spiriferida - Theodossiidae
Parent taxon: Theodossiidae according to A. Williams et al. 2006
Sister taxon: Branikiinae
Subtaxa: Paralazutkinia Theodossia Urella
Type: Theodossia
Ecology: stationary epifaunal suspension feeder
Distribution:
• Devonian of Canada (4: Alberta, British Columbia, Northwest Territories collections), the Russian Federation (5), United States (16: Alaska, Iowa), Vietnam (1)
Total: 26 collections including 28 occurrences