†order Sandiviiformes (vertebrate)
Parent taxon: Thelodonti according to R. van der Laan 2019
See also Long 2011
Sister taxa: Archipelepidiformes, Boreania, Furcacaudiformes, Helenolepididae, Loganelliiformes, Longodidae, Oeseliidae, Phlebolepidiformes, Shieliiformes, Thelodontiformes, Valiukia
Subtaxa: Angaralepididae Sandiviidae Stroinolepididae
Ecology: planktonic suspension feeder
Distribution:
• Silurian of the Russian Federation (3 collections)
• Ordovician of the Russian Federation (5)
Total: 8 collections including 11 occurrences