Project 3587: C. Olivier, B. Battail, S. Bourquin, C. Rossignol, J. Steyer, N. Jalil. 2019. New dicynodonts (Therapsida, Anomodontia) from near the Permo-Triassic boundary of Laos: implications for dicynodont survivorship across the Permo-Triassic mass extinction and the paleobiogeography of Southeast Asian blocks. Journal of Vertebrate Paleontology. 39 (2):e1584745.
Specimen: † Dicynodon lacerticeps (unvouchered)
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Abstract

The dicynodonts are an emblematic group of herbivorous therapsids that survived the Permo-Triassic (P-Tr) crisis. Laotian dicynodonts from stratigraphically constrained beds, recently dated using the U-Pb zircon method, yield new insights into terrestrial faunas of Southeast Asia during the latest Permian and earliest Triassic. Summarily described, they were originally attributed to the genus Dicynodon. We provide a new phylogenetic analysis for Laotian dicynodonts, based on three well-preserved skulls, indicating that they belong to two new taxa: Counillonia superoculis, gen. et sp. nov., and Repelinosaurus robustus, gen. et sp. nov. Our phylogenetic analysis of Dicynodontia indicates that (1) Counillonia is closely related to some ‘Dicynodon'-grade taxa and (2) Repelinosaurus is a kannemeyeriiform. The phylogenetic affinities of these new Laotian dicynodonts allow discussion of the survivorship of multiple lineages (Kannemeyeriiformes and ‘Dicynodon'grade dicynodontoids) across the P-Tr crisis. The Laotian dicynodonts also shed new light on the paleobiogeography of Southeast Asia from the late Paleozoic to the early Mesozoic, particularly the timing of collisions between the Indochina, the South China, and the North China blocks. The presence of dicynodonts in Laos, most likely in the Early Triassic, thus implies that the connection between the Indochina Block and the South China Block occurred no later than the latest Permian or earliest Triassic (i.e., when the dicynodonts provide direct evidence for a connection).


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Article DOI: 10.1080/02724634.2019.1584745
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 106 Taxa
  • 1 Specimen
  • 194 Characters
Total size of project's media files: 346.47k

Download Project SDD File
Total scored cells: 14439
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 194
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 438
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:1/193
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MorphoBank Project 3587
  • Creation Date:
    15 November 2019
  • Publication Date:
    15 January 2020
  • Project views: 466

    Authors' Institutions

    • Muséum national d'histoire naturelle, Paris (Natural History Museum, Paris)

    • Centre National de la Recherche Scientifique (CNRS)

    • University of Rennes

    • Universidade de Sao Paulo

    • Sorbonne Université

    • Université Cadi Ayyad



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Ana Andruchow-Colombo
    Project Administrator
    Last logged in 12/30/19
    106001940014439
    (12944, 0, 1495)
    000
    Chloe Olivier
    Full membership
    Last logged in Never
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M26359' (106 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
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    NPA
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    "-" cellscell images labels on
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    [1] † Biarmosuchus
    Last Modified in 01/15/20
    33150150011002
    [2] † Hipposaurus boonstrai
    Last Modified in 01/15/20
    33148148013002
    [3] † Archaeosyodon praeventor
    Last Modified in 01/15/20
    8510610603002
    [4] † Titanophoneus potens
    Last Modified in 01/15/20
    22159158014002
    [5] † Gorgonops torvus
    Last Modified in 01/15/20
    2516116108002
    [6] † Lycosuchus vanderrieti
    Last Modified in 01/15/20
    27153153014002
    [7] † Glanosuchus macrops
    Last Modified in 01/15/20
    18161161015002
    [8] † Biseridens qilianicus
    Last Modified in 01/15/20
    7511511504002
    [9] † Anomocephalus africanus
    Last Modified in 01/15/20
    166282800002
    [10] † Tiarajudens eccentricus
    Last Modified in 01/15/20
    139535302002
    [11] † Otsheria netzvetajevi
    Last Modified in 01/15/20
    978686011002
    [12] † Ulemica
    Last Modified in 01/15/20
    55126125014002
    [13] † Suminia getmanovi
    Last Modified in 01/15/20
    21153153020002
    [14] † Patranomodon nyaphulii
    Last Modified in 01/15/20
    51129129014002
    [15] † Galeops whaitsi
    Last Modified in 01/15/20
    63117117014002
    [16] † Galepus jouberti
    Last Modified in 01/15/20
    151404003002
    [17] † Galechirus scholtzi
    Last Modified in 01/15/20
    132575705002
    [18] † Eodicynodon oelofseni
    Last Modified in 01/15/20
    94939307002
    [19] † Eodicynodon oosthuizeni
    Last Modified in 01/15/20
    6166166022002
    [20] † Colobodectes cluveri
    Last Modified in 01/15/20
    79104104011002
    [21] † Lanthanostegus mohoii
    Last Modified in 01/15/20
    133595902002
    [22] † Eosimops newtoni
    Last Modified in 01/15/20
    18158156020002
    [23] † Prosictodon dubei
    Last Modified in 01/15/20
    53126126015002
    [24] † Diictodon feliceps
    Last Modified in 01/15/20
    8167164022002
    [25] † Robertia broomiana
    Last Modified in 01/15/20
    14160160020002
    [26] † Pristerodon mackayi
    Last Modified in 01/15/20
    7165165022002
    [27] † Brachyprosopus broomi
    Last Modified in 01/15/20
    23152152019002
    [28] † Endothiodon bathystoma
    Last Modified in 01/15/20
    14161158022002
    [29] † Endothiodon tolani
    Last Modified in 01/15/20
    60125124010002
    [30] † Niassodon mfumukasi
    Last Modified in 01/15/20
    54130130010002
    [31] † Digalodon rubidgei
    Last Modified in 01/15/20
    63120120011002
    [32] † Emydops
    Last Modified in 01/15/20
    8165164022002
    [33] † Dicynodontoides
    Last Modified in 01/15/20
    10163163021002
    [34] † Kombuisia frerensis
    Last Modified in 01/15/20
    65119119010002
    [35] † Myosaurus gracilis
    Last Modified in 01/15/20
    30146146018002
    [36] † Sauroscaptor tharavati
    Last Modified in 01/15/20
    91949409002
    [37] † Cistecephalus microrhinus
    Last Modified in 01/15/20
    13162160021002
    [38] † Cistecephaloides boonstrai
    Last Modified in 01/15/20
    60121121013002
    [39] † Kawingasaurus fossilis
    Last Modified in 01/15/20
    42136136016002
    [40] † Rhachiocephalus magnus
    Last Modified in 01/15/20
    22154153019002
    [41] † Kitchinganomodon crassus
    Last Modified in 01/15/20
    43134134017002
    [42] † Oudenodon bainii
    Last Modified in 01/15/20
    6166165023002
    [43] † Tropidostoma dubium
    Last Modified in 01/15/20
    17155155022002
    [44] † Australobarbarus
    Last Modified in 01/15/20
    41131131022002
    [45] † Odontocyclops whaitsi
    Last Modified in 01/15/20
    21150150023002
    [46] † Idelesaurus tataricus
    Last Modified in 01/15/20
    46132132016002
    [47] † Aulacephalodon bainii
    Last Modified in 01/15/20
    6170165023002
    [48] † Pelanomodon moschops
    Last Modified in 01/15/20
    69111110015002
    [49] † Geikia locusticeps
    Last Modified in 01/15/20
    40138138016002
    [50] † Geikia elginensis
    Last Modified in 01/15/20
    889696010002
    [51] † Elph borealis
    Last Modified in 01/15/20
    69113113012002
    [52] † Interpresosaurus blomi
    Last Modified in 01/15/20
    150444400002
    [53] † Katumbia parringtoni
    Last Modified in 01/15/20
    60120120014002
    [54] † Delectosaurus arefjevi
    Last Modified in 01/15/20
    74108107013002
    [55] † Dicynodon lacerticeps
    Last Modified in 01/15/20
    42137136016002
    [56] † Dicynodon huenei
    Last Modified in 01/15/20
    15157156023002
    [57] † Daptocephalus leoniceps
    Last Modified in 01/15/20
    32145145017002
    [58] † Daqingshanodon limbus
    Last Modified in 01/15/20
    58121121015002
    [59] † Dinanomodon gilli
    Last Modified in 01/15/20
    56123123015002
    [60] † Peramodon amalitzkii
    Last Modified in 01/15/20
    879595012002
    [61] † Vivaxosaurus trautscholdi
    Last Modified in 01/15/20
    35142140019002
    [62] † Jimusaria sinkiangensis
    Last Modified in 01/15/20
    61120120013002
    [63] † Sintocephalus alticeps
    Last Modified in 01/15/20
    1018080013002
    [64] † Basilodon woodwardi
    Last Modified in 01/15/20
    70111111013002
    [65] † Turfanodon bogdaensis
    Last Modified in 01/15/20
    103868605002
    [66] † Keyseria benjamini
    Last Modified in 01/15/20
    83100100011002
    [67] † Gordonia traquairi
    Last Modified in 01/15/20
    81101101012002
    [68] † Syops vanhoepeni
    Last Modified in 01/15/20
    105878702002
    [69] † Euptychognathus bathyrhynchus
    Last Modified in 01/15/20
    66113113015002
    [70] † Lystrosaurus hedini
    Last Modified in 01/15/20
    46132132016002
    [71] † Lystrosaurus maccaigi
    Last Modified in 01/15/20
    37138138019002
    [72] † Lystrosaurus curvatus
    Last Modified in 01/15/20
    33138138023002
    [73] † Lystrosaurus declivis
    Last Modified in 01/15/20
    12159159023002
    [74] † Lystrosaurus murrayi
    Last Modified in 01/15/20
    12159159023002
    [75] † Angonisaurus cruickshanki
    Last Modified in 01/15/20
    49126126019002
    [76] † Tetragonias njalilus
    Last Modified in 01/15/20
    10163162022002
    [77] † Shansiodon
    Last Modified in 01/15/20
    34138138022002
    [78] † Vinceria andina
    Last Modified in 01/15/20
    869696012002
    [79] † Rhinodicynodon gracile
    Last Modified in 01/15/20
    45130130019002
    [80] † Dinodontosaurus
    Last Modified in 01/15/20
    15156156023002
    [81] † Kannemeyeria simocephalus
    Last Modified in 01/15/20
    11161161022002
    [82] † Kannemeyeria lophorhinus
    Last Modified in 01/15/20
    53129129012002
    [83] † Dolichuranus primaevus
    Last Modified in 01/15/20
    35141141018002
    [84] † Wadiasaurus indicus
    Last Modified in 01/15/20
    68108107019002
    [85] † Rabidosaurus cristatus
    Last Modified in 01/15/20
    118737303002
    [86] † Rhadiodromus
    Last Modified in 01/15/20
    879594013002
    [87] † Rechnisaurus cristarhynchus
    Last Modified in 01/15/20
    112757507002
    [88] † Uralokannemeyeria vjuschkovi
    Last Modified in 01/15/20
    1047979011002
    [89] † Shaanbeikannemeyeria
    Last Modified in 01/15/20
    58121121015002
    [90] † Xiyukannemeyeria brevirostris
    Last Modified in 01/15/20
    55125125014002
    [91] † Parakannemeyeria
    Last Modified in 01/15/20
    22150149023002
    [92] † Sinokannemeyeria
    Last Modified in 01/15/20
    27145145022002
    [93] † Stahleckeria potens
    Last Modified in 01/15/20
    12161161021002
    [94] † Eubrachiosaurus browni
    Last Modified in 01/15/20
    1839902002
    [95] † Sangusaurus parringtonii
    Last Modified in 01/15/20
    46134134014002
    [96] † Ischigualastia jenseni
    Last Modified in 01/15/20
    24150150020002
    [97] † Jachaleria
    Last Modified in 01/15/20
    45130130019002
    [98] † Zambiasaurus submersus
    Last Modified in 01/15/20
    132606002002
    [99] † Placerias hesternus
    Last Modified in 01/15/20
    7212012002002
    [100] † Moghreberia nmachouensis
    Last Modified in 01/15/20
    97979700002
    [101] † Rastodon procurvidens
    Last Modified in 01/15/20
    80101101013002
    [102] † Bulbasaurus phylloxyron
    Last Modified in 01/15/20
    59125121014002
    [103] † Compsodon helmoedi
    Last Modified in 01/15/20
    70111111013002
    [104] † Counillonia superoculis
    Last Modified in 01/15/20
    107787809002
    [105] † Repelinosaurus robustus (1993-2)
    Last Modified in 01/15/20
    113757506002
    [106] † Repelinosaurus robustus (1995-9)
    Last Modified in 01/15/20
    106828206002


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    type number of views Individual items viewed (where applicable)
    Total project views466
    Project overview39
    Matrix views34Laos (10 views); Matrix landing page (24 views);
    Documents list27
    Media views77Media search (65 views); M683406 (12 views);
    Bibliography14
    Taxon list222
    Views for media list20
    Specimen list33




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