Search results for "Zonitidae"

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Phylogenèse et biogéographie deRetinella (Lyrodiscus) Pilsbry (Gasteropoda: Zonitidae)

1990

Resume Les especes fossiles (ouest-europeennes) et actuelles (endemiques des Iles Canaries) du sous-genre Lyrodiscus (Neogene — Quaternaire) ont ete revisees sur les memes bases methodologiques. La premiere partie propose un historique de Retinella (Lyrodiscus) et des differents taxons qui lui sont apparentes. Cette revue aborde la creation de Retinella (Riediella) par Schlickum, sour-genre destine a accueillir l'espece Helix jourdani creee par Michaud . La deuxieme partie permet, sur les bases d'une analyse morphologique comparative, de reconsiderer cette attribution generique en rejetant Riedeliella et en proposant d'integrer l'espece de Michaud a Lyrodiscus. Cette confrontation a permis …

GeographybiologySpace and Planetary SciencePaleontologybiology.organism_classificationHumanitiesZonitidaeGeobios
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Aegopinella bourdieri nov. sp. (Gastropoda: Zonitidae),une espèce nouvelle du Pléistocène normand (France)

1989

St Pierre-les-Elbeuf (Normandy, NE France) is a reference site for the middle and the upper Pleistocene of NW France. In the eastern part of the quarry, the paleosoils Elbeuf III and IV are truncated, white sands and a small tufa lay on Elbeuf IV. Similar deposits have been recognized at Vernon (Seine valley) and at Arrest (northern France). They are probably contemporaneous (Holsteinian) and each of them has yielded an interglacial malacological fauna. The faunal communities are interesting because they are composed by species living up to now in this country, by emigrated species and by fossil species. Among them, A. bourdieri is a new fossil taxa, endemic of Holsteinian tufas of Normandy…

SystematicsbiologyPleistoceneEcologyFaunaPaleontologybiology.organism_classificationZonitidaeTaxonSpace and Planetary ScienceHomogeneousTufaInterglacialGeologyGeobios
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