Globularia Swainson, 1840
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publication ID |
https://doi.org/ 10.4202/app.2009.0084 |
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persistent identifier |
https://treatment.plazi.org/id/E8075B43-A57F-FFDA-3F06-FC6571372724 |
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treatment provided by |
Felipe |
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scientific name |
Globularia Swainson, 1840 |
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Subgenus Globularia Swainson, 1840
Globularia (Globularia) sigaretina ( Lamarck, 1804) View in CoL Fig. 4A–C View Fig .
Stratigraphic and geographic range.—Middle Eocene, Lutetian–Bartonian (PB, HB).
Colour pattern description.—The shells show four levels of residual colouration. The background is often dark and homogeneous ( Fig. 4A, C View Fig ), but it can be heterogeneous with slightly fluorescent broad spiral stripes ( Fig. 4B View Fig ). The apex is pale and there are fluorescent axial thin zigzagging stripes superimposed on the background ( Fig. 4A, C View Fig ). The transition between the two levels of residual colouration of the background is diffuse. Zigzags occur along the whole height of the stripes and have variable amplitude ( Fig. 4A View Fig ). The density of the zigzags varies with the specimens. One specimen shows an additional fluorescent spiral stripe ( Fig. 4C View Fig ) on the base of the shell. This residual colour pattern is very similar to that of Globularia (G.) berthelini (Cossmann, 1892) from the Lutetian of the Paris Basin ( Fig. 4D–F View Fig ).
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