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Swiss Journal of Palaeontology
Fig. 4 | Swiss Journal of Palaeontology

Fig. 4

From: New biostratigraphical data (calcareous nannofossils, ammonites) and Early to Late Barremian transition in the Urgonien Jaune facies and Marnes de la Russille complex of the Swiss Jura Mountains

Fig. 4

Ammonites from the Urgonien Jaune (UJ) of the Vaud Jura Mountains. 1–2: Cruasiceras cf. cruasense (Torcapel 1884), reworked, original negative imprint (1) and positive plaster mould (2) of an adult whorl portion, Eclépens quarry, basal UJ, early Late Hauterivian (Sayni Zone), MGL 101510. 3–5: Lyticoceras claveli (Busnardo and Thieuloy 1989), reworked fragment in opposite lateral views (3–4) and ventral view (5), Eclépens quarry, basal UJ, late Early Hauterivian (Nodosoplicatum Zone), MGL 97797. 6–18: Pseudometahoplites sp. juv., internal mould of a nucleus, Montcherand section (Gorges de l’Orbe), basal Marnes de la Russille, Mid-Barremian Compressissima/Moutonianum to Vandenheckii Zones, MGL 101512, imagery by CLSM “confocal laser scanning microscopy” (6–14), optical microscopy (15–16) and SEM “scanning electron microscopy” (17–18) with lateral views (opposite sides: 6, 7–8, 15, 17), ventral views (11, 13–14, 16, 18) and variable views by 3D image rotation (9–13), ornamentation schemes (8, 14) with tubercles and ribs marked in red for primary ribs or in white for secondary ribs

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