Taxonomic implications of the residual colour patterns of ampullinid gastropods and their contribution to the discrimination from naticids

• Autorzy: Caze B. , Merle D. , Le Meur M. , Pacaud J.-M. , Ledon D. , Sain Martin J.-P.
• Języki publikacji: EN

Abstrakty

EN

The diversity of residual colour patterns is revealed for the first time in the European fossil Ampullinidae. The colour patterns were studied under Ultraviolet (UV) light in approximately 3100 specimens belonging to 83 species, 12 genera (Ampullina, Globularia, Crommium, Amaurellina, Pachycrommium, Amauropsina, Ampullonatica, Eocernina, Ampullinopsis, Vanikoropsis, Pictavia, and Ampullospira) and three subgenera (Globularia, Deshayesia, and Cernina within the genus Globularia). Forty−six Cainozoic species revealed residual colour patterns and 29 of them, belonging to six genera (Ampullina, Globularia, Crommium, Amaurellina, Pachycrommium, Amauropsina), are described herein as examples representing the entire diversity of the encountered colour patterns. These patterns are most diverse during the Middle Eocene coincident with the period of highest taxonomic diversity of the Ampullinidae. Four basic classes, regarded as containing possible homologous colour patterns in terms of pigments incorporation modalities, are proposed. Class I, a fluorescent wide diffuse area or spiral stripes, occurs in most of the species, while the three others are more peculiar. Class II, fluorescent axial zigzagging stripes, Class III, fluorescent axial to slightly opisthocline stripes or segments, and Class IV, fluorescent patches forming axial segments by coalescence, allow an easy distinction between the genera Globularia, Pachycrommium, and three peculiar species of Ampullina. The bauplan of the colour patterns revealed in Globularia is very similar to that of the single extant species, Globularia (Cernina) fluctuata. This supports the view of previous authors who classified them in the same genus. Furthermore, at the family level, the peculiar residual patterns belonging to classes II, III, and IV have not been observed in naticid gastropods. Thus our results for the Cainozoic fossil record are consistent with the conclusions based on anatomy and feeding habits, namely that ampullinid gastropods, regarded for a long time as belonging to the family Naticidae, constitute a family apart.

Słowa kluczowe

EN

taxonomy; residual colour pattern; ampullinid gastropod; gastropod; contribution; discrimination; naticid; Ampullinidae; Naticidae; shell; evolution; Cainozoic; Europe; Ampullina; Globularia; Crommium; Amaurellina; Pachycrommium; Amauropsina; Ampullonatica; Eocernina; Ampullinopsis; Vanikoropsis; Pictavia; Ampullospira; Deshayesia; Cernina

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2011
• Tom: 56
• Numer: 2
• Opis fizyczny: p.329-347,fig.,ref.

Twórcy

autor

Caze B.

• Museum National d’Histoire Naturelle, Departement Histoire de la Terre, Centre de Recherches sur la Paleobiodiversite et les Paleoenvironnements (CR2P); UMR 7207 du CNRS. 8, rue Buffon, CP 38, F-75005 Paris, France

autor

Merle D.

autor

Le Meur M.

autor

Pacaud J.-M.

autor

Ledon D.

autor

Sain Martin J.-P.

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