Early cephalopod evolution clarified through Bayesian phylogenetic inference
Pohle, Alexander1; Kroeger, Bjoern2; Warnock, Rachel C. M.3; King, Andy H.4; Evans, David H.5; Aubrechtova, Martina6,7; Cichowolski, Marcela8,9; Fang, Xiang(方翔)10,11; Klug, Christian1
Source PublicationBMC BIOLOGY

Background Despite the excellent fossil record of cephalopods, their early evolution is poorly understood. Different, partly incompatible phylogenetic hypotheses have been proposed in the past, which reflected individual author's opinions on the importance of certain characters but were not based on thorough cladistic analyses. At the same time, methods of phylogenetic inference have undergone substantial improvements. For fossil datasets, which typically only include morphological data, Bayesian inference and in particular the introduction of the fossilized birth-death model have opened new possibilities. Nevertheless, many tree topologies recovered from these new methods reflect large uncertainties, which have led to discussions on how to best summarize the information contained in the posterior set of trees. Results We present a large, newly compiled morphological character matrix of Cambrian and Ordovician cephalopods to conduct a comprehensive phylogenetic analysis and resolve existing controversies. Our results recover three major monophyletic groups, which correspond to the previously recognized Endoceratoidea, Multiceratoidea, and Orthoceratoidea, though comprising slightly different taxa. In addition, many Cambrian and Early Ordovician representatives of the Ellesmerocerida and Plectronocerida were recovered near the root. The Ellesmerocerida is para- and polyphyletic, with some of its members recovered among the Multiceratoidea and early Endoceratoidea. These relationships are robust against modifications of the dataset. While our trees initially seem to reflect large uncertainties, these are mainly a consequence of the way clade support is measured. We show that clade posterior probabilities and tree similarity metrics often underestimate congruence between trees, especially if wildcard taxa are involved. Conclusions Our results provide important insights into the earliest evolution of cephalopods and clarify evolutionary pathways. We provide a classification scheme that is based on a robust phylogenetic analysis. Moreover, we provide some general insights on the application of Bayesian phylogenetic inference on morphological datasets. We support earlier findings that quartet similarity metrics should be preferred over the Robinson-Foulds distance when higher-level phylogenetic relationships are of interest and propose that using a posteriori pruned maximum clade credibility trees help in assessing support for phylogenetic relationships among a set of relevant taxa, because they provide clade support values that better reflect the phylogenetic signal.

KeywordCephalopoda Phylogeny Nautiloidea Orthoceratoidea Multiceratoidea Endoceratoidea Bayesian phylogenetics Fossilized birth-death process Posterior clade probabilities Tree similarities
Indexed BySCI
Funding ProjectSwiss National Science Foundation[200020_169627] ; Research Plan of the Institute of Geology of the Czech Academy of Sciences[RVO67985831] ; Faculty of Science, Charles University[UNCE/SCI/006]
WOS Research AreaLife Sciences & Biomedicine - Other Topics
WOS SubjectBiology
WOS IDWOS:000782606300001
Funding OrganizationSwiss National Science Foundation ; Research Plan of the Institute of Geology of the Czech Academy of Sciences ; Faculty of Science, Charles University
Document Type期刊论文
Corresponding AuthorPohle, Alexander
Affiliation1.Univ Zurich, Palaontol Inst & Museum, Karl Schmid Str 4, CH-8006 Zurich, Switzerland
2.Univ Helsinki, Finnish Museum Nat Hist, POB 44,Jyrangontie 2, FI-00014 Helsinki, Finland
3.Friedrich Alexander Univ Erlangen Nurnberg, GeoZentrum Nordbayern, Loewenichstr 28, D-91054 Erlangen, Germany
4.Geckoella Ltd, Suite 323,7 Bridge St, Taunton TA1 1TG, Somerset, England
5.Nat England, Rivers House, East Quay TA6 4YS, Bridgwater, England
6.Charles Univ Prague, Fac Sci, Inst Geol & Palaeontol, Albertov 6, Prague 12843, Czech Republic
7.Czech Acad Sci, Inst Geol, Rozvojova 269, Prague 16500, Czech Republic
8.Univ Buenos Aires, Inst Estudios Andinos Don Pablo Groeber, CONICET, Ciudad Univ,Pab 2,C1428EGA, Buenos Aires, DF, Argentina
9.Univ Buenos Aires, Fac Ciencias Exactas & Nat, Ciudad Univ,Pab 2,C1428EGA, Buenos Aires, DF, Argentina
10.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Pohle, Alexander,Kroeger, Bjoern,Warnock, Rachel C. M.,et al. Early cephalopod evolution clarified through Bayesian phylogenetic inference[J]. BMC BIOLOGY,2022,20(1):30.
APA Pohle, Alexander.,Kroeger, Bjoern.,Warnock, Rachel C. M..,King, Andy H..,Evans, David H..,...&Klug, Christian.(2022).Early cephalopod evolution clarified through Bayesian phylogenetic inference.BMC BIOLOGY,20(1),30.
MLA Pohle, Alexander,et al."Early cephalopod evolution clarified through Bayesian phylogenetic inference".BMC BIOLOGY 20.1(2022):30.
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