Globularia (Globularia) peyreirensis ( Cossmann and Peyrot, 1919 )
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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-FFD4-3C5F-FC6871AA2094 |
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treatment provided by |
Felipe |
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scientific name |
Globularia (Globularia) peyreirensis ( Cossmann and Peyrot, 1919 ) |
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Globularia (Globularia) peyreirensis ( Cossmann and Peyrot, 1919)
Fig. 5A View Fig .
Stratigraphic and geographic range.—Late Oligocene, Chattian–Early Miocene, Aquitanian (AB).
Colour pattern description.—The shell displays only two levels of residual colouration (apex absent). The background is dark and homogeneous. There are numerous axial fluorescent thin zigzagging stripes ( Fig. 5A View Fig ). The zigzags occur along the whole height of the stripes and have variable amplitude. The thin stripes are not strictly parallel and connect to each other at several points. These connections produce the occurrence of large fluorescent “patches” ( Fig. 5A View Fig 1 View Fig , A 2 View Fig ).
? Globularia pilula ( Deshayes, 1864)
Fig. 5B, C View Fig .
Stratigraphic and geographic range.—Middle Eocene, Lutetian (PB).
Colour pattern description.—The colour pattern consists of three levels of residual colouration: a dark and homogeneous background, a pale apex and some thin fluorescent axial stripes forming zigzags ( Fig. 5B View Fig 2 View Fig , C). The axial thin stripes are not parallel and present an irregular distribution. The zigzags occur along the whole height of the stripes and display variable amplitude. There is intraspecific variability in the density of axial stripes ( Fig. 5B View Fig 2, C 2 View Fig ).
Comments.—? Globularia pilula has been previously classified in the naticid genus Euspira . These shells strongly differ from the type species of the latter genus, Euspira glaucinoides (Sowerby, 1812) from the Ypresian of England, in many characters (moderately high and acuminate spire, sutural step, minute umbilicus with no sheath and narrow reflected columellar edge). Furthermore, the colour pattern differs from doi:10.4202/app.2009.0084
those of the fossil naticid shells by converging stripes and numerous zigzags with very variable amplitude as observed in the characteristic colour pattern of genus Globularia . Thus, this species is, here, excluded from Euspira and is placed within the family Ampullinidae , but only questionably placed in the genus Globularia , because of its lack of a sheath.
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