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Ammonoid Intraspecific Variability

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Book cover Ammonoid Paleobiology: From anatomy to ecology

Part of the book series: Topics in Geobiology ((TGBI,volume 43))

Abstract

Two main types of intraspecific variation can be distinguished in ammonoids, which are not mutually exclusive: continuous and discontinuous variation. Although many authors acknowledge or implicitly assume a large intraspecific variability is possible in shell shape, ornamentation and suture line, it has only been rarely studied quantitatively. Several potential biases need to be taken into account when studying intraspecific variation of fossil populations including paleoecological, taphonomic and collection biases. Intraspecific variation might be controlled both by genetic and environmental parameters, although both are difficult to separate in fossil samples. In ammonoids, a large part of intraspecific variation in morphology and size has been attributed to differences in growth rates and development. Taking intraspecific variation properly into account is not only of prime importance for taxonomy, but also for studies on biostratigraphy, paleobiogeography, ecology, paleobiology and evolution of ammonoids.

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Acknowledgments

Some of the insights described in this chapter grew during the course of research projects 200021-113956⁄1, 200020-25029, and 200020-132870 funded by the Swiss National Science Foundation SNF. David Ware (Zürich) and Isabelle Rouget (Paris) helped with obtaining some of the literature. Markus Wilmsen (Senckenberg Natural History Collections, Dresden), Gene Hunt (Smithsonian Institution, Washington, USA) and Michał Zatoń (University of Silesia, Sosnowiec) kindly put figures at our disposal. Jerzy Dzik (Institute of Paleobiology, Polish Academy of Sciences, Warsaw), Helga Weitschat on behalf of Wolfgang Weitschat (Geological–Paleontological Institute and Museum, University of Hamburg, retired), Vasily Mitta (Paleontological Institute, Russian Academy of Sciences, Moscow), Lionel Cavin (Natural History Museum of Geneva) on behalf of the journal Revue de Paléobiologie, and Jim Kennedy (University of Oxford, retired) gave permission to use their figures. We thank the reviewers Michał Zatoń (University of Silesia, Sosnowiec) and Sonny A. Walton (Naturkunde Museum, Berlin) for the constructive comments and suggestions. We would like to dedicate this chapter to the inspiring work of Algirdas Dagys and Wolfgang Weitschat on intraspecific variation in Triassic ammonoids.

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Authors and Affiliations

  1. GeoZentrum Nordbayern, Fachgruppe PaläoUmwelt, Universität Erlangen, Loewenichstr 28, 91054, Erlangen, Germany

    Kenneth De Baets

  2. UMR-CNRS 6118 Géosciences, Université de Rennes 1, campus Beaulieu, bâti-ment 15, 35042, Rennes cedex, France

    Didier Bert

  3. Laboratoire du Groupe de recherche en paléobiologie et bios-tratigraphie des ammonites (GPA), Bois-Mésanges, quartier St-Joseph, 04170, La Mure-Argens, France

    Didier Bert

  4. Department of Earth Sciences, Institute of Geology, Mineralogy, and Geophysics, Ruhr-Universität Bochum, 44801, Bochum, Germany

    René Hoffmann

  5. UMR CNRS 8198 Evo-Eco-Paleo, Université de Lille 1, UFR Sciences de la Terre (SN5), Avenue Paul Langevin, 59655, Villeneuve d’Ascq cedex, France

    Claude Monnet

  6. Department of Geology, Bowling Green State University, 190 Overman Hall, 43403-0218, Bowling Green, Ohio, USA

    Margaret M. Yacobucci

  7. Paläontologisches Institut und Museum, University of Zurich, Karl Schmid-Strasse 6, 8006, Zurich, Switzerland

    Christian Klug

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  6. Christian Klug
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Correspondence to Kenneth De Baets .

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Editors and Affiliations

  1. Paläontologisches Institut und Museum, University of Zurich, Zürich, Switzerland

    Christian Klug

  2. Leibniz-Institut für Evolutions und Biodiversitätsforschung, Museum für Naturkunde, Berlin, Germany

    Dieter Korn

  3. GeoZentrum Nordbayern, Friedrich-Alexander-Universität Erlangen, Erlangen, Germany

    Kenneth De Baets

  4. Division of Paleontology, American Museum of Natural History, New York, New York, USA

    Isabelle Kruta

  5. North Carolina Museum of Natural Science, Raleigh, USA

    Royal H. Mapes

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De Baets, K., Bert, D., Hoffmann, R., Monnet, C., Yacobucci, M., Klug, C. (2015). Ammonoid Intraspecific Variability. In: Klug, C., Korn, D., De Baets, K., Kruta, I., Mapes, R. (eds) Ammonoid Paleobiology: From anatomy to ecology. Topics in Geobiology, vol 43. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-9630-9_9

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