Articles | Volume 21, issue 2
https://doi.org/10.5194/fr-21-223-2018
https://doi.org/10.5194/fr-21-223-2018
Research article
 | 
11 Sep 2018
Research article |  | 11 Sep 2018

Quantitative analysis of suture lines in Carboniferous ammonoids

Michael Wegerer, Kenneth De Baets, and Dieter Korn

Cited articles

Adams, D. C.: Quantifying and comparing phylogenetic evolutionary rates for shape and other high-dimensional phenotypic data, Syst. Biol., 63, 166–177, 2014. 
Adams, D. C. and Otárola-Castillo, E.: geomorph: an R package for the collection and analysis of geometric morphometric shape data, Methods Ecol. Evol., 4, 393–399, 2013. 
Adams, D., Rohlf, F. J., and Slice, D.: Geometric morphometrics: Ten years of progress following the `revolution', Ital. J. Zool., 71, 5–16, 2004. 
Adams, D. C., Rohlf, F. J., and Slice, D. E.: A field comes of age: geometric morphometrics in the 21st century, Hystrix, 24, 7–14, 2013. 
Allen, E. G.: New approaches to Fourier analysis of ammonoid sutures and other complex, open curves, Paleobiology, 32, 299–315, 2006. 
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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.
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