FIG. 12. — A1-A3, Pseudaganides buffeventi n in Antaganides n. gen., a new genus of Middle Jurassic nautiloid, ancestor of Pseudaganides Spath, 1927, with discussion on the phyletic origin of the family Pseudonautilidae

FIG. 12. — A1-A3, Pseudaganides buffeventi n. sp., holotype (2023.PB.N76), adult shell, bed 9, Buffevent quarry near Niort, Lower Callovian, Bullatus Zone; B1-B3, Pseudaganides buffeventi n. sp., specimen 2023.PB.N102, adult shell, Salles, Lower Callovian, Bullatus Zone; C1-C3, Pseudaganides crechensis n. sp., holotype (2023.PB.N107), Champs-Albert near la Crèche, Lower Callovian, Gracilis Zone, Prahecquense Subzone. *, end of the phragmocone. Scale bars: 1 cm.