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Swiss Journal of Palaeontology
Fig. 6 | Swiss Journal of Palaeontology

Fig. 6

From: Multiple Orbitoides d’Orbigny lineages in the Maastrichtian? Data from the Central Sakarya Basin (Turkey) and Arabian Platform successions (Southeastern Turkey and Oman)

Fig. 6

a Morphological elements of genus Orbitoides; block diagram of the test and nomenclature for embryonic-nepionic stage of the megalospheric generations. b Schematic morphological changes in Orbitoides and their stratigraphic relationship. Species parameters and limits are shown. Nomenclature is after van Hinte (1965) and Baumfalk (1986), and species limits after van Hinte (1976)

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