†family Polydesmiidae Kobayashi 1940 (mollusk)
Cephalopoda - Actinocerida - Polydesmiidae
Parent taxon: Actinocerida according to R. E. Crick 1981
See also Teichert et al. 1964
Sister taxa: Actinoceratidae, Armenoceratidae, Astoceras, Calhounoceras, Carbactinoceratidae, Eldroceras, Georginidae, Gonioceratidae, Gouldoceratidae, Greenlandoceratidae, Hopeioceras, Huroniidae, Jeholoceras, Kobayashiceras, Meitanoceratidae, Ormoceratidae, Parahelenites, Parahelenitidae, Pseudactinoceratidae, Ruedemannoceratidae, Subtofangoceras, Wutinoceratidae, Zerashanoceras
Subtaxa: Ordosoceras Polydesmia
Ecology: nektobenthic carnivore
Distribution:
• Dawan of Mongolia (1 collection)
• Arenig of China (8), South Korea (1)
• Ordovician of China (2)
Total: 12 collections including 15 occurrences