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8 results for “Germanonautilus”
Fig. 3 Germanonautilus aff. ellipticus Parnes, 1986, PIMUZ 29942 in Middle Triassic Nautilida from the Besano Formation of Monte San Giorgio, Switzerland
Fig. 3 Germanonautilus aff. ellipticus Parnes, 1986, PIMUZ 29942, Valle Stelle/Tre Fontane (Monte San Giorgio), Middle Besano Formation (bed 73), Secedensis Zone, Illyrian: a original specimen partially included in the matrix, lateral view, b ventral view, associated with an external mold of Stoppaniceras cf. artinii, c plaster cast replica of the same specimen, lateral view, d plaster cast replica of the same specimen, ventral view, e plaster cast replica of the same specimen, ventrolateral view, f drawing of the ventral view showing the hypothetical whorl section (in grey the flank areas)
Fig. 9 in Soft-tissue attachment structures and taphonomy of the Middle Triassic nautiloid Germanonautilus
Fig. 9. Reconstruction of the conch and the soft parts of Germanonautilus tridorsatus (Böttcher, 1938); oblique view; × 0.3.
Fig. 6 in Soft-tissue attachment structures and taphonomy of the Middle Triassic nautiloid Germanonautilus
Fig. 6. Outline in venter (A) and left flank(B) of the folded carbonaceous layer (remains of the soft parts?), the attachment area of the cephalic retractor and the posterior mantle (mantle myoadhesive band) of Germanonautilus bidorsatus (von Schlotheim, 1820), SMNS 64881, coll. H.E. Meuret (1959), Upper Muschelkalk, Nussloch/ Heidelberg (southern Germany).
Fig. 5 in Soft-tissue attachment structures and taphonomy of the Middle Triassic nautiloid Germanonautilus
Fig. 5. Germanonautilus with remains of the black layer from the German Muschelkalk (Anisian, Ladinian, Middle Triassic). A. G. bidorsatus (von Schlotheim, 1820), MHI 919, compressus Zone, Upper Muschelkalk, Middle Triassic, Garnberg near Künzelsau; this specimen shows the attachment structures of the cephalic retractors, mantle myoadhesive band, palliovisceral ligament, septal myoadhesive band, dorsal mantle, and the aperture; × 0.5. B. G. suevicus Philippi 1898, SMNS 64961, Upper Muschelkalk, Middle Triassic, Kupferzell−Rüblingen (Kleinknecht quarry). Note the black layer in the concave whorl zone and the epifauna consisting of the oyster Placunopsis and the inarticulate brachiopod Discinisca; B1 ventral view, showing a detail of B3 with a thin line of the black substance extending along a growth line, × 1; B2 lateral view, with the attachment structures of the mantle myoadhesive band and the cephalic retractor, × 0.5; B3 ventral view, complete specimen with a thin line the black substance extending along a growth line; the dark colour of the venter might be caused by remains of the periostracum, × 0.5. C. Juvenile specimen of G. suevicus Philippi 1898, MHI 72, Tonhorizont ζ, nodosus Zone, Upper Muschelkalk, Middle Triassic, Heimbacher Steige, Schwäbisch Hall; this specimen is preserved with the embryonal spiral sculpture and the black layer; × 0.5.
Fig. 4 in Soft-tissue attachment structures and taphonomy of the Middle Triassic nautiloid Germanonautilus
Fig. 4. Germanonautilus bidorsatus (von Schlotheim, 1820) from the German Muschelkalk and Recent Nautilus from the Indopacific. A. Germanonautilus bidorsatus (von Schlotheim, 1820), right lateral view; SMNS 75229−1, coll. M. Warth, Hassmersheimer Marls 3, atavus Zone, Upper Muschelkalk (Anisian, Triassic), Weiler zum Stein (southern Germany); coated with ammonium chloride in right lateral view (A1); × 0.5. Detail of flank of the same (A2); note the attachment area of the cephalic retractor, the mantle myoadhesive band, the palliovisceral ligament, and the septal myoadhesive band with tracking bands (also behind the last formed septum); coated with ammonium chloride; × 2. B. Apertural view of Nautilus macromphalus Sowerby, 1849 (SMNS Zl 9614, Recent, New Caledonia, coll. Wessel 1860, displaying the attachment areas of the cephalic retractors, the mantle myoadhesive band and the dorsal mantle (black layer); × 0.5. C. Internal view of Nautilus pompilius Linnaeus, 1758; SMNS Zl 9615, Recent, locality unknown, with attachment areas of the cephalic retractors, the mantle and septal myoadhesive bands; × 0.75.
Fig. 3 in Soft-tissue attachment structures and taphonomy of the Middle Triassic nautiloid Germanonautilus
Fig. 3. Outline of soft−tissue attachment structures in Triassic and Recent Nautiloidea; the large scar of the cephalic retractor is in light grey. A. Nautilus pompilius Linnaeus, 1758, Recent, locality unknown, SMNS Zl 9615. B. Germanonautilus bidorsatus (von Schlotheim, 1820); SMNS 26618/11, coll. R. Mundlos, Upper Muschelkalk (Anisian, Triassic), Schöningen/ Elm (central Germany); the growth lines are partially reconstructed. C. The same species, right flank; SMNS 75229−1, coll. M. Warth, Hassmersheimer Marls 3, atavus Zone, Upper Muschelkalk (Anisian, Triassic), Weiler zum Stein (southern Germany). Note the larger distance between the attachment areas of the cephalic retractor due to the broader venter of G. bidorsatus (B) and the different course of the attachment of the palliovisceral ligament.
Fig. 7 in Soft-tissue attachment structures and taphonomy of the Middle Triassic nautiloid Germanonautilus
Fig. 7. Epifauna on Germanonautilus conchs. A. A cluster of 14 specimens of the brachiopod Coenothyris vulgaris (Schlotheim, 1820) on the venter of a large body chamber of Germanonautilus bidorsatus (von Schlotheim, 1820), SMNS 26679 (wh = 108 mm), Hassmersheimer Mergel, Upper Muschelkalk, Middle Triassic, Helmhof near Untergimpern (cf. Aigner et al. 1978); × 0.5. B. Germanonautilus suevicus Philippi, 1898, SMNS 24999/2 (dm = 298 mm), dorsoplanus Zone, Upper Muschelkalk, Middle Triassic, Kupferzell−Rüblingen (Kleinknecht quarry); × 0.3. Note the thick bulbous crust consisting of the oyster Placunopsis ostracina (von Schlotheim, 1820). Asterisk denotes the approximate position of aperture in incomplete specimens.
Fig. 8 in Soft-tissue attachment structures and taphonomy of the Middle Triassic nautiloid Germanonautilus
Fig. 8. Orientation of the aperture and body chamber length of Germanonautilus bidorsatus (von Schlotheim, 1820) from the German Muschelkalk and of Recent Nautilus (modified after Saunders and Shapiro 1986).
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