Journal metrics

Journal metrics

  • IF value: 0.783 IF 0.783
  • IF 5-year value: 1.000 IF 5-year 1.000
  • CiteScore value: 0.86 CiteScore 0.86
  • SNIP value: 0.543 SNIP 0.543
  • SJR value: 0.382 SJR 0.382
  • IPP value: 0.72 IPP 0.72
  • Scimago H index value: 12 Scimago H index 12
Volume 21, issue 2 | Copyright
Foss. Rec., 21, 223-236, 2018
https://doi.org/10.5194/fr-21-223-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 11 Sep 2018

Research article | 11 Sep 2018

Quantitative analysis of suture lines in Carboniferous ammonoids

Michael Wegerer1, Kenneth De Baets2, and Dieter Korn1 Michael Wegerer et al.
  • 1Museum für Naturkunde Berlin, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstraße 43, 10115 Berlin, Germany
  • 2GeoZentrum Nordbayern, Universität Erlangen-Nürnberg, Loewenichstraße 28, 91054 Erlangen, Germany

Abstract. Two morphometric methods are applied and compared for the analysis of suture lines in Early Carboniferous ammonoids of the superfamilies Pericycloidea, Girtyoceratoidea and Goniatitoidea. We analysed (1) classic metric data (proportions of the width and depths or heights of lobes and saddles) using multivariate statistic methods and (2) outline data of the external lobe and the ventrolateral saddle of the same ammonoid taxa using the elliptic Fourier analysis. Both methods lead to similar results and simultaneously demonstrate ontogenetic and phylogenetic trends of these ammonoids. Our results are consistent with three previously suggested evolutionary patterns: (1) a general decrease of the amplitude of lobes and saddles, (2) a proportional widening of the external lobe and (3) a heightening of the median saddle.

Download & links
Publications Copernicus
Download
Short summary
Two morphometric methods are applied for the analysis of suture lines in Early Carboniferous ammonoids: (1) classic metric data using multivariate statistic methods and (2) outline data are analysed using the elliptic Fourier analysis. Both methods lead to similar results and demonstrate ontogenetic and phylogenetic trends in these ammonoids: (1) a general decrease in the amplitude of lobes and saddles, (2) a proportional widening of the external lobe, and (3) a heightening of the median saddle.
Two morphometric methods are applied for the analysis of suture lines in Early Carboniferous...
Citation
Share