Kurzfassung
Die spätjurassische AusterNanogyra virgula ist in feinkörnigen, niedrig-energeti-schen Sedimenten des europäischen Kontinentalmeeres weit verbreitet. Während sie in frühen Jugendstadien auf hartem Substrat aufgewachsen war, lebten Adultformen häufig frei auf weichem, schlammigen Substrat. Diese Interpretation wird durch mehrere morphologische Anpassungen gestützt.
Abstract
The late Jurassic exogyrine oysterNanogyra virgula occurs in fine-grained low-energy sediments of the European epicontinental sea. It is interpreted as having lived cemented to hard substrates during early juvenile stages, but commonly reclining on soft, muddy substrates in the adult stage. This is supported by several morphological adaptations to such a mode of life.
Literature
Fürsich, F. T. &Oschmann, W. (1986): Storm shell beds ofNanogyra in the Upper Jurassic of France. — N. Jb. Geol. Paläont. Abh.,172: 141 -161; Stuttgart.
Gautret, P. (1982): Le genreNanogyra Beurlen dans le jurassique supérieur nord —aquitain (Paléontologie, paléoécologie, utilisation biostratigraphique). — Dipl. Etud. Prat. Sci. Univ. Poitiers, 97 pp., 8pls.; Poitiers.
Hallam, A. (1982): Patterns of speciation in JurassicGryphaea. — Paleobiology,8: 354 -366; Chicago.
Jourdy, E. (1924): Histoire naturelle des Exogyres. — Ann. Paléont.,13: 104 pp.; Paris.
Pugaczewska, H. (1971): Jurassic Ostreidae of Poland. — Acta palaeont. Polon.,16: 195 -311; Warszawa.
Seilacher, A. (1984): Constructional morphology of bivalves: evolutionary pathways in primary versus secondary soft -bottom dwellers. — Palaeontology,27: 207 -237; London.
Seilacher, A.;Matyja, B. A. &Wierzbowski, A. (1985): Oyster beds: Morphologic response to changing substrate conditions. — [In:] Bayer, U. & Seilacher, A. (eds.): Sedimentary and evolutionary cycles. Lecture Notes in Earth Sci., 1: 421 -435; Berlin.
Stenzel, H. B. (1971): Oysters. — [In:]Moore, R. C. &Teichert, C. (eds.): Treatise on Invertebrate Paleontology (N) Mollusca 6, Bivalvia: N953 -N1224; Geol. Soc. America, Boulder and Univ. Kansas, Lawrence.
Ziegler, B. (1969): ÜberExogyra virgula (Lamellibranchiata, Oberjura). — Eclogae geol. Helv., 62: 685 -696; Basel.
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Fursich, F.T., Oschmann, W. & München Autecology of the upper jurassic oysternanogyra virgula (defrance). Paläont. Z. 60, 65–74 (1986). https://doi.org/10.1007/BF02989423
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DOI: https://doi.org/10.1007/BF02989423