†family Grypoceratidae Hyatt 1900 (mollusk)
Cephalopoda - Nautilida - Grypoceratidae
Parent taxon: Trigonoceratoidea according to S. Niko and R. H. Mapes 2016
See also Teichert et al. 1964 and Zakharov and Shigeta 2000
Sister taxa: Dasbergoceratidae, Temnocheilidae, Thrincoceratidae, Trigonoceratidae
Subtaxa: Grypoceras Gryponautilus Gyronautilinae Menuthionautilus Xiaohenautilus
Ecology: nektobenthic carnivore
Distribution:
• Triassic of Austria (9 collections), China (15), India (6), Indonesia (1), Israel (1), Italy (3), New Zealand (1), Pakistan (2), Romania (1), the Russian Federation (23), Spain (2), United States (13: California, Idaho, Nevada)
• Permian of India (1)
Total: 78 collections including 93 occurrences