†family Clydonautilidae Hyatt in Zittel 1900 (mollusk)
Cephalopoda - Nautilida - Clydonautilidae
Parent taxon: Clydonautilaceae according to C. Teichert et al. 1964
Sister taxa: Ephippioceratidae, Gonionautilidae, Liroceratidae, Siberionautilidae
Subtaxa: Callaionautilus Clydonautilus Cosmonautilus Proclydonautilus Styrionautilus
Ecology: nektobenthic carnivore
Distribution:
• Triassic of Austria (19 collections), Canada (1: British Columbia), India (3), Iran (2), Nepal (1), New Zealand (3), Romania (1), the Russian Federation (32), Slovenia (1), Svalbard and Jan Mayen (2), Ukraine (1), United States (11: Alaska, California, Nevada)
• Permian of Azerbaijan (1)
Total: 78 collections including 95 occurrences