Amaurellina spirata Lamarck, 1804
publication ID |
https://doi.org/ 10.4202/app.2009.0084 |
persistent identifier |
https://treatment.plazi.org/id/E8075B43-A572-FFD7-3C0A-FE1576152283 |
treatment provided by |
Felipe |
scientific name |
Amaurellina spirata Lamarck, 1804 |
status |
|
Amaurellina spirata Lamarck, 1804 View in CoL
Fig. 7A–C View Fig .
Stratigraphic and geographic range.—Middle Eocene, Lutetian (PB, Cotentin)
Colour pattern description.—This species shows three levels of residual colouration. The background is heterogeneous with an almost completely dark whorl except the slightly fluorescent shoulder that forms a spiral stripe ( Fig. 7A–C View Fig ). The apex is pale ( Fig. 7A–C View Fig ). The fluorescent stripe covering the subcarinate shoulder is straight and has a constant width ( Fig. 7A View Fig 1 View Fig , C). This stripe is sometimes also observable on the penultimate whorl ( Fig. 7C View Fig ). The transition between this stripe and the darker colouration of the whorl is diffuse. The base of the whorl can be slightly fluorescent too.
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