Project 717: M. Zhu, X. Yu, J. Lu, T. Qiao, W. Zhao, L. Jia. 2012. Earliest known coelacanth skull extends the range of anatomically modern coelacanths to the Early Devonian. Nature Communications. 3 (772).
Specimen: Euporosteus (IVPP/V17682:1)

Abstract

Coelacanths are known for their evolutionary conservatism, and the body plan seen in Latimeria can be traced to late Middle Devonian Diplocercides, Holopterygius and presumably Euporosteus. However, the group's early history is unclear because of an incomplete fossil record. Until now, the only Early Devonian coelacanth is an isolated dentary (Eoactinistia) from Australia, whose position within the coelacanths is unknown. Here we report the earliest known coelacanth skull (Euporosteus yunnanensis sp. nov.) from the Early Devonian (late Pragian) of Yunnan, China. Resolved by maximum parsimony, maximum likelihood and Bayesian analyses as crownward of Diplocercides or as its sister taxon, the new form extends the chronological range of anatomically modern coelacanths by about 17 Myr. The finding lends support to the possibility that Eoactinistia is also an anatomically modern coelacanth, and provides a more refined reference point for studying the rapid early diversification and subsequent evolutionary conservatism of the coelacanths.


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Project DOI: 10.7934/P717, http://dx.doi.org/10.7934/P717
This project containsMatrices
  • 2 Media
  • 1 Matrix
  • 1 Document
  • 29 Taxa
  • 2 Specimens
  • 101 Characters
Total size of project's media files: 1 MB

Download Project SDD File
Total scored cells: 2342
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 101
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 209
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:101/0
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MorphoBank Project 717


    Members

    member name taxa specimens media chars character
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    cell scorings
    (scored, NPA, "-")
    cell
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    Maureen Admin
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    Zhu Min
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    Tuo Qiao
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    Taxonomic Overview for Matrix 'M1644' (29 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
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    [1] Actinopterygii
    Last Modified in 12/05/13
    19888200004
    [2] Porolepiformes
    Last Modified in 12/05/13
    91029200004
    [3] Axelrodichthys
    Last Modified in 12/05/13
    111039000004
    [4] Caridosuctor
    Last Modified in 12/05/13
    27867400004
    [5] Chinlea
    Last Modified in 12/05/13
    44675700004
    [6] Coccoderma
    Last Modified in 12/05/13
    23917800004
    [7] Coelacanthus
    Last Modified in 12/05/13
    32796900004
    [8] Diplocercides
    Last Modified in 12/05/13
    111049000004
    [9] Diplurus
    Last Modified in 12/05/13
    121038900004
    [10] Allenypterus
    Last Modified in 12/05/13
    35806600004
    [11] Holopterygius
    Last Modified in 12/05/13
    78232300004
    [12] Euporosteus
    Last Modified in 12/05/13
    78232300004
    [13] Gavinia
    Last Modified in 12/05/13
    68393300004
    [14] Garnbergia
    Last Modified in 12/05/13
    76332500004
    [15] Hadronector
    Last Modified in 12/05/13
    31797000004
    [16] Holophagus
    Last Modified in 12/05/13
    28867300004
    [17] Latimeria
    Last Modified in 12/05/13
    111410000004
    [18] Laugia
    Last Modified in 12/05/13
    81079300004
    [19] Libys
    Last Modified in 12/05/13
    35766600004
    [20] Lochmocercus
    Last Modified in 12/05/13
    52564900004
    [21] Macropoma
    Last Modified in 12/05/13
    81079300004
    [22] Mawsonia
    Last Modified in 12/05/13
    37746400004
    [23] Miguashaia
    Last Modified in 12/05/13
    41696000004
    [24] Polyosteorhynchus
    Last Modified in 12/05/13
    32796900004
    [25] Rhabdoderma
    Last Modified in 12/05/13
    21139900004
    [26] Sassenia
    Last Modified in 12/05/13
    32816900004
    [27] Spermatodus
    Last Modified in 12/05/13
    34766700004
    [28] Undina
    Last Modified in 12/05/13
    16958500004
    [29] Whiteia
    Last Modified in 12/05/13
    61099500004


    Project views

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    Total project views20773
    Project overview2412
    Matrix views1828Matrix landing page (1496 views); Coelacanths matrix (332 views);
    Media views3994Media search (3115 views); M107727 (440 views); M107726 (439 views);
    Documents list1306
    Specimen list2127
    Bibliography723
    Taxon list8383




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project157
    Document downloads1Copyright information for exemplar media (1 download);
    Project downloads149
    Matrix downloads7Coelacanths matrix (7 downloads);