Amaurellina spirata Lamarck, 1804

Caze, Bruno, Merle, Didier, Meur, Mathieu Le, Pacaud, Jean-Michel, Ledon, Daniel & Martin, Jean-Paul Saint, 2011, Taxonomic implications of the residual colour patterns of ampullinid gastropods and their contribution to the discrimination from naticids, Acta Palaeontologica Polonica 56 (2), pp. 329-347 : 339

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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