Cepaea eversa Deshayes 1851
Authors/Creators
Description
Cepaea cf. eversa Deshayes, 1851
(Figs. 15–16)
Helix eversa Deshayes, 1851: 395 (pl. 1, figs. 5–7). Cepaea eversa eversa: Wenz, 1923: 617.
Cepaea eversa larteti: Gall, 1980: 60.
Cepaea eversa: Hír & Kókay, 2004: 89.
Cepaea cf. eversa: Salvador, 2013b: 162 (figs. 10–13).
Material examined. BSPG 1952 XVIII 8 (19 spcm.)
Description. Shell large, 4½ to 4¾ whorls. Protoconch flattened, smooth; transition to teleoconch unclear. Teleoconch smooth, except for growth lines. Suture well-marked. Whorl profile flat on first whorls. Body whorl rounded, slightly bent downwards near aperture. Aperture prosocline, rounded. Peristome reflexed; slightly thickened on basal and columellar regions. Umbilicus imperforate.
Previous identification of the material. Gall (1980: Nr. 15): Cepaea eversa larteti (Boissy).
Discussion. The present specimens from Sandelzhausen compare reasonably well with C. eversa and can be differentiated from the specimens of C. cf. sylvestrina Schlotheim (see below) by a larger size, a higher spire, a rounder aperture and one quarter to one half additional whorl. Nevertheless, the specimens of C. eversa from Gündlkofen are always larger, also with half whorl more, than typical specimens. Nevertheless, as common in the genus, C. eversa seems to be a very variable species regarding shell morphology (Hír & Kókay 2004). It is a frequent species in Middle Miocene (MN 5–7) deposits of Central and Western Europe (Hír & Kókay 2004).
Paleoecological remarks. Recent Cepaea have too broad a range of habitats (Welter-Schultes 2012) to be useful for a paleoenvironmental analysis.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Scientific name authorship
- Deshayes
- Kingdom
- Animalia
- Phylum
- Mollusca
- Order
- Stylommatophora
- Family
- Helicidae
- Genus
- Cepaea
- Species
- eversa
- Taxon rank
- species
- Taxonomic concept label
- Cepaea eversa Deshayes, 1851 sec. Salvador, 2014
References
- Deshayes, G. P. (1851) Helix eversa. In: Ferussac, A. E. J. P. J. F. d'A. de & Deshayes, G. P. (Eds.), (1819 - 1851) Histoire naturelle generale et particuliere des mollusques terrestres et fluviatiles, tant des especes que l'on trouve aujourd'hui vivantes, que des depouilles fossiles de celles qui n'existent plus; classes d'apres les caracteres essentiels que presentent ces animaux et leurs coquilles. Vol. 1. J. B. Bailliere, Paris, pp. 395 - 396.
- Wenz, W. (1923) Gastropoda extramarina tertiaria I, II, III, VI. In: Diener, C. (Ed.), Fossilium Catalogus I: Animalia. W. Junk, Berlin, pp. 1 - 352, 353 - 736, 737 - 1068, 1735 - 1862.
- Gall, H. (1980) Eine Gastropodenfauna aus dem Landshuter Schotter der Oberen Sußwassermolasse (Westliche Paratethys, Badenien) von Gundlkofen / Niederbayern. Mitteilungen der Bayerischen Staatssammlung fur Palaontologie und historische Geologie, 20, 51 - 77.
- Hir, J. & Kokay, J. (2004) Middle Miocene molluscs and rodents from Matraszolos (Matra Mountains, Hungary). Fragmenta Palaeontologica Hungarica, 22, 83 - 97.
- Salvador, R. B. (2013 b) The fossil pulmonate snails of Sandelzhausen (Early / Middle Miocene, Germany): Succineidae, Testacelloidea and Helicoidea. Zootaxa, 3721 (2), 157 - 171. http: // dx. doi. org / 10.11646 / zootaxa. 3721.2.3
- Welter-Schultes, F. (2012) European Non-marine Molluscs, a Guide for Species Identification. Planet Poster Editions, Gottingen, 679 + 78 pp.