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Given "wether they truly represent ‘living fossils’", why not opt for a graph visualising the (inferred) evolutionary change and morphological diversity such as a phylogram or distance-based network? Rather than the usual (in palaeontological papers) cladogram, which only summarises (here) the Bayesian sampled topologies but doesn't give any information about the branch lengths.

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The phylogeny and systematics of Xiphosura

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Paleontology and Evolutionary Science

Main article text

 

Introduction

Materials & Methods

Results

Systematic Palaeontology

Discussion

Conclusions

Supplemental Information

Phylogenetic data matrix of Xiphosura in NEXUS file format

Phylogenetic character matrix utilised in the study. Saved in NEXUS format.

DOI: 10.7717/peerj.10431/supp-1

Parsimony phylogenetic tree

Maximum parsimony strict consensus of 6 most parsimonious trees. Values beneath nodes are Bootstrap/Bremer/Jacknife support values.

DOI: 10.7717/peerj.10431/supp-2

Additional Information and Declarations

Competing Interests

The author declares that there are no competing interests.

Author Contributions

James C. Lamsdell conceived and designed the experiments, performed the experiments, analyzed the data, prepared figures and/or tables, authored or reviewed drafts of the paper, and approved the final draft.

Data Availability

The following information was supplied regarding data availability:

Data for this study are available at MorphoBank P3497 and in the Supplementary Files.

https://morphobank.org/index.php/Projects/ProjectOverview/project_id/3497.

Specimens figured in the manuscript are accessioned at the Australian Museum, Sydney, New South Wales, Australia (AM F68969, AM F38274); British Geological Survey, Nottingham, England, UK (BGS GSM49362); Field Museum of Natural History, Chicago, Illinois, USA (FMNH PE.56581); Muséum-Aquarium de Nancy, Lorraine, France (MAN 8240); Manitoba Museum, Winnipeg, Manitoba, Canada (MM I-4583); Manchester Museum, Manchester, England, UK (MMUP L.8627); Museum National d’Histoire Naturelle, Paris, France (MNHN.F.A33516); Museo Civico di Storia Naturale di Milano, Milan, Italy (MSNM i26844, MSNM i9352); National Museums of Scotland, Edinburgh, Scotland, UK (NMS G.2007.271.A, NMS G.1984.67.1B); Museums Victoria, Carlton, Victoria, Australia (NMV P22410B); National Museum of Wales, Cardiff, Wales, UK (NMW 29.197.G3, NMW 29.198.G1); Nova Scotia Museum, Halifax, Nova Scotia, Canada (NSM 005GF045.374); Oxford University Museum of Natural History, Oxford, England, UK (OUM E.03994); Royal Ontario Museum, Toronto, Ontario, Canada (ROM IP45851); Senckenberg Forschungsinstitut und Naturmuseum, Frankfurt am Main, Germany (SMF VII I 311); Technische Universität Institut für Geologie und Paläontologie, Clausthal-Zellerfeld, Germany (TUCP Ch.5); and Yale Peabody Museum, New Haven, Connecticut, USA (YPM IP 026324, YPM IP 000125, YPM IP 428963, YPM IZ 055605, YPM IZ 070174, YPM IZ 055595, YPM IZ 055574, YPM IZ 055578, YPM IZ 055570, YPM IZ 055581, YPM IZ 055576, YPM IZ 070174).

New Species Registration

The following information was supplied regarding the registration of a newly described species:

Publication LSID: urn:lsid:zoobank.org:pub:3653AFDA-318D-4A1D-9E24-4F9F3D30C424

Allolimulus: urn:lsid:zoobank.org:act:236EACF3-BC00-4F40-9D3A-D595983FDD9F

Andersoniella: urn:lsid:zoobank.org:act:71A1F53C-1C4E-4D3C-B6E0-F9144141D617

Batracholimulus: urn:lsid:zoobank.org:act:65347E99-A7FF-4426-9F97-E5CB78A41ADD

Boeotiaspis: urn:lsid:zoobank.org:act:03CDF266-1553-486D-8310-61E585D2C81F

Keuperlimulus: urn:lsid:zoobank.org:act:10A6B1A6-7C1C-4767-B16B-76DAF1FE3938

Macrobelinurus: urn:lsid:zoobank.org:act:DEAE80E8-F135-43FE-A19A-24BA7CCDF603

Norilimulus: urn:lsid:zoobank.org:act:177CF385-D4E4-442B-9E96-D0C896B6B86C

Parabelinurus: urn:lsid:zoobank.org:act:5F50A91F-ABAE-4BE8-924C-09EEC51B1F8C

Volanalimulus: urn:lsid:zoobank.org:act:AA6B8DC3-9FBB-4ED9-91DA-DAA797AC54A9

Volanalimulus madagascarensis: urn:lsid:zoobank.org:act:4AB258D3-3487-4CA6-9C59-D29CDBA0F5FB.

Funding

This research was supported by National Science Foundation CAREER award EAR-1943082 ‘Exploring environmental drivers of morphological change through phylogenetic paleoecology’. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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