Project 2695: J. F. Hoyal Cuthill, J. Han. 2018. Cambrian petalonamid Stromatoveris phylogenetically links Ediacaran biota to later animals. Palaeontology. 61 (6):813-823.
Specimen: † Stromatoveris (ELI:EJ-105-A)
View: Frontal view of specimen

Abstract

Macro‐organisms of the Ediacaran period (635–541 Ma) were large and morphologically complex, with some living in aphotic habitats, presenting the possibility that they were early animals. However, ‘bizarre’ Ediacaran morphologies and mouldic preservation have frustrated comparison to later taxa. Consequently, both the positions of Ediacaran biota in the tree of life and the origins of the Metazoa have remained disputed. Here we provide phylogenetic evidence to identify Ediacaran macro‐biota as animals, based on 206 new fossils of Stromatoveris psygmoglena from the lower Cambrian Chengjiang Lagerstätte. Exceptionally preserved soft‐tissue anatomy shows that Stromatoveris was a soft‐bodied, radially symmetric animal with multiple, sub‐branched petaloids and a differentiated holdfast. Photo‐referenced morphological character analysis enables phylogenetic reconstruction of a monophyletic clade designated Petalonamae, that unites Stromatoveris with iconic Ediacaran genera (Rangea, Pteridinium, Ernietta, Swartpuntia, Arborea, Pambikalbae and Dickinsonia) and is placed as sister‐group to the Eumetazoa. Therefore, based on phylogenetic bracketing within the Metazoa, the Ediacaran petalonamids are established as animals. From these findings, it follows that petalonamids remained an important component of Cambrian marine ecosystems and that the metazoan radiation can be dated to a minimum age of between 558 and 571 myr.


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Article DOI: 10.1111/pala.12393

Project DOI: 10.7934/P2695, http://dx.doi.org/10.7934/P2695
This project containsMatrices
  • 94 Media
  • 1 Matrix
  • 19 Taxa
  • 71 Specimens
  • 42 Characters
Total size of project's media files: 1.29G

Download Project SDD File
Total scored cells: 737
Total media associated with cells: 626
Total labels associated with cell media: 643
Characters
Total characters: 42
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 85
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:41/1
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MorphoBank Project 2695

    Authors' Institutions

    • Northwest University

    • University of Cambridge

    • Tokyo Institute of Technology



    Members

    member name taxa specimens media media
    notes
    chars character
    comms
       
    notes  media
    labels
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    comms
        
    notes  medialabels
    rules
    Jennifer Hoyal Cuthill
    Project Administrator
    197194574203500737
    (724, 0, 13)
    01616266430
    Seth Kaufman
    0000000000
    (0, 0, 0)
    00000


    Taxonomic Overview for Matrix 'M24692' (19 Taxa)

    taxon unscored
    cells
    scored
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    no cell
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    NPA
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    "-" cellscell images labels on
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    [1] † Rangea
    Last Modified in 05/30/17
    53710046481
    [2] † Stromatoveris
    Last Modified in 06/02/17
    33900048491
    [3] † Pteridinium
    Last Modified in 09/04/17
    73500047501
    [4] † Arborea
    Last Modified in 06/02/17
    73500045481
    [5] † Pambikalbae
    Last Modified in 06/02/17
    83400044471
    [6] † Swartpuntia
    Last Modified in 06/02/17
    83400042451
    [7] † Dickinsonia
    Last Modified in 09/04/17
    63600050511
    [8] † Ernietta
    Last Modified in 06/02/17
    83400046481
    [9] † Palaeopascichnus
    Last Modified in 09/11/17
    1403301001
    [10] † Bosworthia
    Last Modified in 08/28/17
    0413601001
    [11] Rhizocarpon
    Last Modified in 08/29/17
    04000242431
    [12] † Thectardis
    Last Modified in 06/02/17
    63300342421
    [13] † Leptomitus
    Last Modified in 09/04/17
    13800342421
    [14] † Galeactena
    Last Modified in 08/08/17
    14100042451
    [15] Trichoplax
    Last Modified in 08/29/17
    03900346371
    [16] Fungia
    Last Modified in 09/04/17
    04200044481
    [17] Pennatula
    Last Modified in 11/22/17
    0422900001
    [18] Spinther
    Last Modified in 08/29/17
    0422900001
    [19] † Pikaia
    Last Modified in 08/31/17
    0422700001


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