†family Eldoniidae Walcott 1911
Parent taxon: Cambroernids according to J.-B. Caron et al. 2010
See also Schroeder et al. 2018
Sister taxa: Cheungkongella, Herpetogaster
Subtaxa: Eldonia Paropsonema Rotadiscus
Distribution:
• Cambrian of Canada (11: British Columbia collections), China (17), the Russian Federation (1), United States (2: Utah)
Total: 31 collections including 32 occurrences