Project 929: R. M. D. Beck, K. J. Travouillon, K. P. Aplin, H. Godthelp, M. Archer. The Osteology and Systematics of the Enigmatic Australian Oligo-Miocene Metatherian Yalkaparidon (Yalkaparidontidae; Yalkaparidontia; ?Australidelphia; Marsupialia). Journal of Mammalian Evolution.
Specimen: † Yalkaparidon (QM:F13008)

Abstract

We provide the first detailed description of the osteology of the enigmatic Oligo-Miocene Australian metatherian Yalkaparidon. This taxon exhibits a number of unusual craniodental apomorphies but appears to be plesiomorphic within Metatheria in retaining four molars, rather than three as previously reported. We demonstrate that the only known skull of Yalkaparidon almost certainly represents a single individual. We also tentatively refer a number of isolated tarsals to the genus. Maximum parsimony analyses of a 258 character morphological matrix (with information from the tarsals described here either included or excluded) place Yalkaparidon within the superordinal clade Australidelphia, but Bayesian analyses of the same matrix are less well resolved, placing Yalkaparidon within Marsupialia but without unequivocally supporting australidelphian affinities. Bayesian analyses of a total evidence matrix that combines the morphological data with 9 kb of sequence data from five nuclear protein-coding genes (APOB, BRCA1, IRBP, RAG1 and VWF), 78 indels, and 53 retroposon insertion characters are similarly poorly resolved and do not clarify the supraordinal relationships of Yalkaparidon beyond suggesting that it is probably a member of Marsupialia. However, if the tarsal remains are correctly attributed to Yalkaparidon, then membership of Australidelphia seems likely, as these specimens exhibit characteristic australidelphian apomorphies. We conclude that the ordinal status of Yalkaparidon remains justified based on current evidence, and we present a revised diagnosis for Yalkaparidontia. We maintain the two currently recognized species, Y. coheni and Y. jonesi, but present revised specific diagnoses. We suggest a revised phylogenetic definition for Marsupialia, and provide phylogenetic definitions for Eomarsupialia (the clade comprising all extant Australian marsupial orders) and for the clade comprising Dasyuromorphia, Peramelemorphia, and Notoryctemorphia to the exclusion of Diprotodontia; we propose the name Agreodontia for the latter clade.


Read the article »

Project DOI: 10.7934/P929, http://dx.doi.org/10.7934/P929
This project containsMatrices
  • 1 Media
  • 2 Matrices
  • 1 Document
  • 38 Taxa
  • 1 Specimen
  • 258 Characters
Total size of project's media files: 1 MB

Download Project SDD File
Total scored cells: 15328
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 516
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 598
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:516/0
Currently Viewing:
MorphoBank Project 929

    This research
    supported by



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Robin Beck
    Project Administrator
    Last logged in 11/27/13
    38015160015328
    (14999, 0, 329)
    000
    Maureen Admin
    Full membership
    Last logged in 12/02/13
    0000000
    (0, 0, 0)
    000
    MorphoBank Curator
    Full membership
    Last logged in 08/06/14
    0100000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M2051' (38 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Ornithorhynchus
    Last Modified in 12/05/13
    27210208023003
    [2] Tachyglossus
    Last Modified in 12/05/13
    22215213023003
    [3] † Vincelestes
    Last Modified in 12/05/13
    7917217108003
    [4] † Ukhaatherium
    Last Modified in 12/05/13
    159989801003
    [5] † Asioryctes
    Last Modified in 12/05/13
    14611111101003
    [6] † Deltatheridium
    Last Modified in 12/05/13
    175787805003
    [7] † Mayulestes
    Last Modified in 12/05/13
    8317417401003
    [8] † Pucadelphys
    Last Modified in 12/05/13
    5520620201003
    [9] † Andinodelphys
    Last Modified in 12/05/13
    7318518401003
    [10] Didelphis
    Last Modified in 12/05/13
    226525402003
    [11] Monodelphis
    Last Modified in 12/05/13
    326125302003
    [12] Caluromys
    Last Modified in 12/05/13
    10715215001003
    [13] Glironia
    Last Modified in 12/05/13
    10015815701003
    [14] Caenolestes
    Last Modified in 12/05/13
    1024924503003
    [15] Dasyuroides
    Last Modified in 12/05/13
    1224824204003
    [16] Dasyurus
    Last Modified in 12/05/13
    826224901003
    [17] Phascogale
    Last Modified in 12/05/13
    1524524201003
    [18] Notoryctes
    Last Modified in 12/05/13
    43208205010003
    [19] Echymipera
    Last Modified in 12/05/13
    924824504003
    [20] Perameles
    Last Modified in 12/05/13
    425525004003
    [21] Dromiciops
    Last Modified in 12/05/13
    725224902003
    [22] Trichosurus
    Last Modified in 12/05/13
    325825203003
    [23] Phalanger
    Last Modified in 12/05/13
    825224604003
    [24] Petaurus
    Last Modified in 12/05/13
    125525205003
    [25] Pseudochirops
    Last Modified in 12/05/13
    525024904003
    [26] Cercartetus
    Last Modified in 12/05/13
    2323123104003
    [27] Macropus
    Last Modified in 12/05/13
    325625104003
    [28] Dendrolagus
    Last Modified in 12/05/13
    1124524205003
    [29] Dorcopsis
    Last Modified in 12/05/13
    1524023904003
    [30] Thylogale
    Last Modified in 12/05/13
    2123423304003
    [31] Vombatus
    Last Modified in 12/05/13
    824724109003
    [32] Phascolarctos
    Last Modified in 12/05/13
    924224207003
    [33] † Asiatherium
    Last Modified in 12/05/13
    208515000003
    [34] † Herpetotherium
    Last Modified in 12/05/13
    10515215201003
    [35] † Peradectidae
    Last Modified in 12/05/13
    188707000003
    [36] † Djarthia
    Last Modified in 12/05/13
    172898402003
    [37] † Palaeothentes
    Last Modified in 12/05/13
    176808002003
    [38] † Yalkaparidon
    Last Modified in 12/05/13
    178787307003


    Taxonomic Overview for Matrix 'M2052' (38 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Ornithorhynchus
    Last Modified in 12/05/13
    27210208023003
    [2] Tachyglossus
    Last Modified in 12/05/13
    22215213023003
    [3] † Vincelestes
    Last Modified in 12/05/13
    7917217108003
    [4] † Ukhaatherium
    Last Modified in 12/05/13
    159989801003
    [5] † Asioryctes
    Last Modified in 12/05/13
    14611111101003
    [6] † Deltatheridium
    Last Modified in 12/05/13
    175787805003
    [7] † Mayulestes
    Last Modified in 12/05/13
    8317417401003
    [8] † Pucadelphys
    Last Modified in 12/05/13
    5520620201003
    [9] † Andinodelphys
    Last Modified in 12/05/13
    7318518401003
    [10] Didelphis
    Last Modified in 12/05/13
    226525402003
    [11] Monodelphis
    Last Modified in 12/05/13
    326125302003
    [12] Caluromys
    Last Modified in 12/05/13
    10715215001003
    [13] Glironia
    Last Modified in 12/05/13
    10015815701003
    [14] Caenolestes
    Last Modified in 12/05/13
    1024924503003
    [15] Dasyuroides
    Last Modified in 12/05/13
    1224824204003
    [16] Dasyurus
    Last Modified in 12/05/13
    826224901003
    [17] Phascogale
    Last Modified in 12/05/13
    1524524201003
    [18] Notoryctes
    Last Modified in 12/05/13
    43208205010003
    [19] Echymipera
    Last Modified in 12/05/13
    924824504003
    [20] Perameles
    Last Modified in 12/05/13
    425525004003
    [21] Dromiciops
    Last Modified in 12/05/13
    725224902003
    [22] Trichosurus
    Last Modified in 12/05/13
    325825203003
    [23] Phalanger
    Last Modified in 12/05/13
    825224604003
    [24] Petaurus
    Last Modified in 12/05/13
    125525205003
    [25] Pseudochirops
    Last Modified in 12/05/13
    525024904003
    [26] Cercartetus
    Last Modified in 12/05/13
    2323123104003
    [27] Macropus
    Last Modified in 12/05/13
    325625104003
    [28] Dendrolagus
    Last Modified in 12/05/13
    1124524205003
    [29] Dorcopsis
    Last Modified in 12/05/13
    1524023904003
    [30] Thylogale
    Last Modified in 12/05/13
    2123423304003
    [31] Vombatus
    Last Modified in 12/05/13
    824724109003
    [32] Phascolarctos
    Last Modified in 12/05/13
    924224207003
    [33] † Asiatherium
    Last Modified in 12/05/13
    208515000003
    [34] † Herpetotherium
    Last Modified in 12/05/13
    10515215201003
    [35] † Peradectidae
    Last Modified in 12/05/13
    188707000003
    [36] † Djarthia
    Last Modified in 12/05/13
    172898402003
    [37] † Palaeothentes
    Last Modified in 12/05/13
    176808002003
    [38] † Yalkaparidon
    Last Modified in 12/05/13
    14511310508003


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views22716
    Project overview3014
    Matrix views2230Matrix landing page (1831 views); Yalkaparidon matrix - Yalkaparidon scored for craniodental characters only (209 views); Yalkaparidon matrix - Yalkaparidon scored for craniodental and tarsal characters (190 views);
    Media views4297Media search (3700 views); M309868 (597 views);
    Taxon list8660
    Specimen list2074
    Documents list1627
    Bibliography814




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project198
    Matrix downloads43Yalkaparidon matrix - Yalkaparidon scored for craniodental and tarsal characters (26 downloads); Yalkaparidon matrix - Yalkaparidon scored for craniodental characters only (17 downloads);
    Project downloads155