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16 results for “Pseudaganides”
FIG. 15. — A1-A3 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. 15. — A1-A3, Pseudaganides subbiangulatus (d'Orbigny, 1850), specimen 2023.PB.N155, la Crèche, Lower Callovian, Gracilis Zone; B1-B3, Belmonticeras subsinuatum (d'Orbigny, 1850), specimen 2023.PB.N150, Chauray, Lower Bajocian, Laeviuscula Zone; C, Pseudaganides subbiangulatus, specimen 2023. PB.N110, detail of the well preserved and particular aperture, Bougon, Lower Callovian, Gracilis Zone, Patina Subzone, Boginense Horizon. *, end of the phragmocone. Scale bars: 1 cm.
FIG. 14. — A1-A3 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. 14. — A1-A3, Pseudaganides subbiangulatus (d'Orbigny, 1850), specimen 2023.PB.N144, la Grève quarry near Saint-Laon, Middle Callovian, Anceps Zone; B1-B3, Pseudaganides dimidiatus Marchand & Tintant, 1971, specimen 2023.PB.N126, la Grève quarry, Middle Callovian, Anceps Zone; C1-C3, Pseudaganides aganiticus (Schlotheim, 1820), specimen 2023.PB.N111, Montreuil-Bellay (Maine-et-Loire), Upper Callovian, Athleta Zone, Trezeense Subzone. *, end of the phragmocone. Scale bars: 1 cm.
FIG. 13. — A 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. 13. — A, Antaganides cf. erycinus (Tagliarini, 1901), n. comb., specimen 2023.PB.N129, with its preserved muscle scar, Niort, Upper Bajocian, Niortense Zone; B, Antaganides cf. erycinus (Tagliarini, 1901), n. comb.,specimen 2023.PB.N148, with its siphuncle,viaduc de l'Égray, Upper Bajocian,Niortense Zone; C, Pseudaganides crechensis n. sp., specimen 2023.PB.N143, newly hatched shell showing its reticulate ornamentation on the phragmocon; D1-D3, Pseudaganides subbiangulatus (d'Orbigny, 1850),specimen 2023.PB.N110, full grown shell with its well preserved aperture,Bougon,Lower Callovian,Gracilis Zone,Patina Subzone,Boginense Horizon; E1-E3, Pseudaganides subbiangulatus, specimen 2023.PB.N112, Niort,Middle Callovian,Anceps Zone,Stuebeli Subzone.*, end of the phragmocone. Scale bars:1 cm.
FIG. 11. — A1-A3, Antaganides grulkei n. gen., 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. 11. — A1-A3, Antaganides grulkei n. gen., n. sp., holotype (2023.PB.N97), adult shell, les Hauts-de-Rochefort quarry, Middle Bathonian, Progracilis Zone; B1-B3, Antaganides grulkei n. gen., n. sp., specimen 2023.PB.N134, Champs-Albert near la Crèche, Upper Bathonian, base of the Retrocostatum Zone; C1-C3, Pseudaganides aquitanense n. sp., holotype (2023.PB.N96), adult shell, Aiffres, Upper Bathonian, Retrocostatum Zone; D1, D2, Pseudaganides aquitanense n. sp., specimen 2023.PB.N106, Champs-Albert near la Crèche, Upper Bathonian, Retrocostatum Zone; E1, E2, Pseudaganides aquitanense n. sp., paratype (2023.PB.N124), bed 8b, Buffevent quarry near Niort, Upper Bathonian, Retrocostatum Zone. *, end of the phragmocone. Scale bars: 1 cm.
FIG. 10 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. 10. — Evolution of the size of the adult shell and phragmocone among the different species of Antaganides n. gen. and Pseudaganides Spath, 1927 for full grown shells.
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.
FIG. 9 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. 9. — Ratio "P/L" of the depth of the width of the lateral lobe compared with its width among the different species of Antaganides n. gen. and Pseudaganides Spath, 1927.
FIG. 8 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. 8. — Ratio "W/H" of the shell among the different species of Antaganides n. gen. and Pseudaganides Spath, 1927.
FIG. 6 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. 6. — Ratio "w" of the width of the whorl compared with the diameter of the shell (W/D) among the different species of Antaganides n. gen. and Pseudaganides Spath, 1927.
FIG. 4 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. 4. — Suture lines of Antaganides n. gen. and Pseudaganides Spath, 1927: A, Antaganides cf. erycinus (Tagliarini,1901), n. comb., 2023.PB.N117; B, Antaganides sauvageti n. gen., n. sp. 2023.PB.N64; C, Antaganides fournieri n. gen., n. sp., 2023.PB.N105; D, Pseudaganides aquitanense n. sp., 2023.PB.N96; E, Pseudaganides buffeventi n. sp., 2023.PB.N76; F, Pseudaganides crechensis n. sp., 2023.PB.N107; G, Pseudaganides subbiangulatus (d'Orbigny, 1850), 2023. PB.N73, Patina Zone; H, Pseudaganides subbiangulatus, 2023.PB.N112, Anceps Zone.
FIG. 5 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. 5. — Ratio "h" of the height of the whorl compared with the diameter of the shell (H/D) among the different species of Antaganides n. gen. and Pseudaganides Spath, 1927.
FIG. 3. — A1-A3 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. 3. — A1-A3, Antaganides cf. erycinus (Tagliarini,1901), n. comb., specimen 2023.PB.N117, bed 32, viaduc de l'Égray, Upper Bajocian, Niortense Zone; B1-B3, Antaganides sauvageti n. gen., n. sp., holotype (2023.PB.N64), viaduc de l'Égray, Lower Bathonian, Zigzag Zone; C1-C3, Antaganides fournieri n. gen., n. sp., holotype (2023.PB.N105), adult shell, les Hauts-de-Rochefort quarry, Middle Bathonian, Progracilis Zone. *, end of the phragmocone. Scale bars: 2 cm.
FIG. 7 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. 7. — Ratio "u" of the umbilical width compared with the diameter of the shell (U/D) among the different species of Antaganides n. gen. and Pseudaganides Spath, 1927.
FIG. 1 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. 1. — Geographical map reporting the position of the localities that provided specimens of Antaganides n. gen. and Pseudaganides Spath, 1927: 1, Buffevent quarry; 2, Niort; 3, Aiffres; 4, Trotte-buie quarry; 5, A83 highway trench at Viaduc de l'Égray; 6, Les Lucs (Échiré); 7, Chaban-de-Chauray; 8, La Crèche; 9, Salles; 10, Bougon; 11, Les Hauts-de-Rochefort quarry; 12, Les Maisons-Blanches; 13, La Grève quarry near Saint-Laon; 14, Montreuil-Bellay.
FIG. 16 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. 16. — Evolution of the Antaganides n. gen.-Pseudaganides Spath, 1927 group from Upper Bajocian to Upper Callovian.
FIG. 2 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. 2. — Dimensional characteristics measured in this study, drawing from Dzik (1984).
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