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Morphometric methods in determination of ammonite species, exemplified through Balatonites shells (Middle Triassic)

Published online by Cambridge University Press:  20 May 2016

J. Hohenegger  and
F. Tatzreiter
J. Hohenegger
Affiliation:
Institut für Paläontologie, Universität Wien, Universitätsstraße 7, A-1010 Wien, Austria
F. Tatzreiter
Affiliation:
Geologisch-Paläontologische Abteilung, Naturhistorisches Museum Wien, Burgring 7, A-1014 Wien, Austria
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Abstract

Specimens of the ammonite genus Balatonites from the Middle Triassic of Austria and Hungary are analyzed morphometrically to obtain growth invariant character states. A new method transforming growth dependent qualitative characters into age invariant metric variables is developed. Weighted standardization as a method preserving univariate discriminatory efficiency is applied to character states preceding numerical classification procedures, resulting in a clearer separation of homogeneous groups in comparison to simple standardized data. All clustering and ordination procedures produce two identical classes, which are interpreted according to the cohesion concept as distinct biological species. In adherence to the taxonomic rules they are denominated as Balatonites egregius Arthaber and Balatonites balatonicus (Mojsisovics).

Type
Research Article
Information
Journal of Paleontology , Volume 66 , Issue 5 , September 1992 , pp. 801 - 816
Copyright
Copyright © The Paleontological Society 

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