†subfamily Platyschismatinae Knight 1956 (snail)
Gastropoda - Eogastropoda - Sinuopeidae
Full reference: J. B. Knight. 1956. New families of Gastropoda. Journal of the Washington Academy of Sciences 46(2):41-42
Parent taxon: Sinuopeidae according to P. Bouchet et al. 2005
See also Knight et al. 1960
Sister taxa: Euconia, Gasconadia, Schizopea, Sinuopeinae
Subtaxa: Umbospira
Type: Platyschisma
Ecology: epifaunal
Distribution:
• Devonian of Australia (3 collections)
• Silurian of Canada (1: Nova Scotia), China (2), the Czech Republic (1)
• Ordovician of Canada (1: Nunavut)
Total: 8 collections each including a single occurrence