{"title":"Quantitative analysis of suture lines in Carboniferous ammonoids","authors":"M. Wegerer, K. De Baets, D. Korn","doi":"10.5194/FR-21-223-2018","DOIUrl":null,"url":null,"abstract":"Abstract. Two morphometric\nmethods are applied and compared for the analysis of suture lines in Early\nCarboniferous ammonoids of the superfamilies Pericycloidea, Girtyoceratoidea\nand Goniatitoidea. We analysed (1) classic metric data (proportions of the\nwidth and depths or heights of lobes and saddles) using multivariate\nstatistic methods and (2) outline data of the external lobe and the\nventrolateral saddle of the same ammonoid taxa using the elliptic Fourier\nanalysis. Both methods lead to similar results and simultaneously demonstrate\nontogenetic and phylogenetic trends of these ammonoids. Our results are\nconsistent with three previously suggested evolutionary patterns: (1) a\ngeneral decrease of the amplitude of lobes and saddles, (2) a proportional\nwidening of the external lobe and (3) a heightening of the median saddle.\n","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":" ","pages":""},"PeriodicalIF":1.9000,"publicationDate":"2018-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fossil Record","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.5194/FR-21-223-2018","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PALEONTOLOGY","Score":null,"Total":0}
引用次数: 2
Abstract
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.
期刊介绍：
Fossil Record (FR) is the palaeontological journal of the Museum für Naturkunde Berlin. This journal was founded in 1998 under the name Mitteilungen aus dem Museum für Naturkunde Berlin, Geowissenschaftliche Reihe and appears with two issues each year. Fossil Record publishes original papers in all areas of palaeontology including the taxonomy and systematics of fossil organisms, biostratigraphy, palaeoecology, and evolution. All taxonomic groups are treated, including invertebrates, microfossils, plants, and vertebrates.
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