Ampullina rustica ( Deshayes, 1864 )
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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-A57B-FFDE-3F06-F8E0764D2354 |
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treatment provided by |
Felipe |
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scientific name |
Ampullina rustica ( Deshayes, 1864 ) |
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Ampullina rustica ( Deshayes, 1864) View in CoL
Fig. 2D View Fig .
Stratigraphic and geographic range.—Middle Eocene, Lutetian (PB, Cotentin).
Colour pattern description.—The shells show three levels of residual colouration. The background is heterogeneous with a dark subsutural step and a wide fluorescent area covering the major part of the whorl ( Fig. 2D 2 View Fig ). The apex is pale. The transition between the fluorescent area and the darker area of the background is mostly diffuse. The absence of fluorescence on the subsutural step induces a dark straight spiral “stripe” ( Fig. 2D View Fig 1 View Fig ). The base of the whorl may be dark too. Sometimes, there are also slightly darker thin and diffuse spiral “stripes” on the last whorl due to a localized lack of fluorescence. These “stripes” are related to obsolete spiral “microlines” and their number and distribution are variable. The residual colour pattern is very similar to that of A. grossa ( Deshayes, 1864) from the Lutetian–Bartonian of the Paris Basin ( Fig. 2E View Fig ).
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