†family Theodossiidae Ivanova 1959 (lamp shell)
Rhynchonellata - Spiriferida - Theodossiidae
Parent taxon: Theodossioidea according to A. Williams et al. 2006
Sister taxa: Palaeochoristitidae, Ulbospiriferidae
Subtaxa: Branikiinae Theodossiinae
Type: Theodossia
Ecology: stationary epifaunal suspension feeder
Distribution:
• Devonian of Canada (4: Alberta, British Columbia, Northwest Territories collections), the Czech Republic (1), the Russian Federation (5), United States (16: Alaska, Iowa), Vietnam (1)
Total: 27 collections including 31 occurrences