Project 682: T. E. Williamson, S. L. Brusatte, T. D. Carr, A. Weil, B. R. Standhardt. 2012. The phylogeny and evolution of Cretaceous-Paleogene metatherians: New cladistic analysis and description of new early Paleocene specimens from the Nacimiento Formation, New Mexico. Journal of Systematic Palaeontology. 10 (4):625-651.
Specimen: † Thylacodon pusillus (NMMNH/P:47328)
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Abstract

Metatherian mammals were the most diverse mammalian clade in North America through the Late Cretaceous, but they underwent a severe extinction at the Cretaceous–Palaeogene (K-Pg) boundary. In order to clarify the origin of Palaeogene metatherians and the pattern of metatherian survivorship across the K-Pg boundary we conducted an inclusive species-level phylogenetic analysis of Cretaceous and early Palaeogene metatherian taxa. This analysis includes information from new Palaeocene specimens from south-western North America. Both the phylogenetic topology and information from new specimens support the validity of the genus Thylacodon and justify the recognition of a new species, T. montanensis. Thylacodon is closely related to Swaindelphys and Herpetotheriidae, which must have diverged by the latest Cretaceous due to its close relationship with late Campanian Ectocentrocristus. Pediomyidae and ‘Peradectidae sensu lato’ together comprise a major metatherian clade. Maastrichtidelphys, from the Late Cretaceous of the Netherlands, is the oldest member of ‘Peradectidae sensu lato’, indicating a Cretaceous origination for this group. Therefore, the major groups Herpetotheriidae and ‘Peradectidae sensu lato’, represented almost completely by Palaeocene taxa, must have originated in the Late Cretaceous. The lineages leading to these clades include at least four lineages that must have crossed the K-Pg boundary and therefore confirm that the K-Pg boundary marked a profound extinction event for metatherians and suggests that Palaeogene taxa originated from only a few clades of Cretaceous species, all of which were relatively minor or very rare components of known Cretaceous mammalian faunas.


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Article DOI: https://doi.org/10.1080/14772019.2011.631592

Project DOI: 10.7934/P682, http://dx.doi.org/10.7934/P682
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 96 Taxa
  • 1 Specimen
  • 78 Characters
Total size of project's media files: 625.97k

Download Project SDD File
Total scored cells: 5255
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 78
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 186
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:78/0
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MorphoBank Project 682

    Authors' Institutions

    • New Mexico Museum of Natural History and Science

    • Oklahoma State University

    • American Museum of Natural History

    • Carthage College



    Members

    member name taxa specimens media chars character
    media
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    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    Last logged in 01/30/13
    2111005255
    (5255, 0, 0)
    000
    Maureen Admin
    Full membership
    Last logged in 01/15/20
    0000000
    (0, 0, 0)
    000
    Thomas Williamson
    Full membership
    Last logged in 01/28/13
    940077000
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    000


    Taxonomic Overview for Matrix 'M1945' (94 Taxa)

    taxon unscored
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    scored
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    [1] † Prokennalestes trofimovi
    Last Modified in 12/05/13
    16626100003
    [2] † Adelodelphys muizoni
    Last Modified in 12/05/13
    39393600003
    [3] † Aenigmadelphys archeri
    Last Modified in 12/05/13
    19595400003
    [4] † Albertatherium primum
    Last Modified in 12/05/13
    35433500003
    [5] † Albertatherium secundum
    Last Modified in 12/05/13
    43353100003
    [6] † Alphadon attaragos
    Last Modified in 12/05/13
    19595600003
    [7] † Alphadon halleyi
    Last Modified in 12/05/13
    11696200003
    [8] † Alphadon marshi
    Last Modified in 12/05/13
    14645700003
    [9] † Alphadon perexiguus
    Last Modified in 12/05/13
    20585300003
    [10] † Alphadon sahnii
    Last Modified in 12/05/13
    17615600003
    [11] † Alphadon wilsoni
    Last Modified in 12/05/13
    15635800003
    [12] † Anchistodelphys archibaldi
    Last Modified in 12/05/13
    17625600003
    [13] † Anchistodelphys delicatus
    Last Modified in 12/05/13
    46323000003
    [14] † Apistodon exiguus
    Last Modified in 12/05/13
    36423900003
    [15] † Aquiladelphis laurae
    Last Modified in 12/05/13
    47312900003
    [16] † Aquiladelphis incus
    Last Modified in 12/05/13
    16625700003
    [17] † Aquiladelphis minor
    Last Modified in 12/05/13
    25535000003
    [18] † Armintodelphys blacki
    Last Modified in 12/05/13
    55242200003
    [19] † Armintodelphys dawsoni
    Last Modified in 12/05/13
    19595600003
    [20] † Asiatherium reshetovi
    Last Modified in 12/05/13
    17615300003
    [21] † Atokatherium boreni
    Last Modified in 12/05/13
    30484700003
    [22] † Bistius bondi
    Last Modified in 12/05/13
    41373500003
    [23] † Copedelphys innominata
    Last Modified in 12/05/13
    16625800003
    [24] † Dakotadens morrowi
    Last Modified in 12/05/13
    17645600003
    [25] † Deltatheridium pretrituberculare
    Last Modified in 12/05/13
    19595300003
    [26] † Deltatheroides cretacicus
    Last Modified in 12/05/13
    44343400003
    [27] † Didelphodon coyi
    Last Modified in 12/05/13
    18605300003
    [28] † Didelphodon vorax
    Last Modified in 12/05/13
    7726200003
    [29] † Ectocentrocristus foxi
    Last Modified in 12/05/13
    32464300003
    [30] † Eoalphadon clemensi
    Last Modified in 12/05/13
    14655800003
    [31] † Eoalphadon lillegraveni
    Last Modified in 12/05/13
    19615600003
    [32] † Eoalphadon woodburnei
    Last Modified in 12/05/13
    20585700003
    [33] † Eodelphis browni
    Last Modified in 12/05/13
    19595500003
    [34] † Eodelphis cutleri
    Last Modified in 12/05/13
    17615500003
    [35] † Glasbius intricatus
    Last Modified in 12/05/13
    12675900003
    [36] † Glasbius twitchelli
    Last Modified in 12/05/13
    10686600003
    [37] † Hatcheritherium alpha
    Last Modified in 12/05/13
    44343300003
    [38] † Goler formation taxon
    Last Modified in 12/05/13
    20585800003
    [39] † Herpetotherium comstocki
    Last Modified in 12/05/13
    16626100003
    [40] † Herpetotherium edwardi
    Last Modified in 12/05/13
    15635900003
    [41] † Herpetotherium fugax
    Last Modified in 12/05/13
    6726600003
    [42] † Herpetotherium knighti
    Last Modified in 12/05/13
    14656200003
    [43] † Herpetotherium marsupium
    Last Modified in 12/05/13
    10696200003
    [44] † Holoclemensia texana
    Last Modified in 12/05/13
    22565600003
    [45] † Iqualadelphis lactea
    Last Modified in 12/05/13
    41373300003
    [46] † Iugomortiferum thoringtoni
    Last Modified in 12/05/13
    18605700003
    [47] † Kokopellia juddi
    Last Modified in 12/05/13
    20585100003
    [48] † Leptalestes cooki
    Last Modified in 12/05/13
    26524800003
    [49] † Leptalestes krejcii
    Last Modified in 12/05/13
    21575200003
    [50] † Leptalestes prokrejcii
    Last Modified in 12/05/13
    26524800003
    [51] † Leptalestes toevsi
    Last Modified in 12/05/13
    34443800003
    [52] † Maastrichtidelphys meurismeti
    Last Modified in 12/05/13
    42363500003
    [53] † Mimoperadectes houdei
    Last Modified in 12/05/13
    31484400003
    [54] † Mimoperadectes labrus
    Last Modified in 12/05/13
    11686100003
    [55] † Nanocuris improvida
    Last Modified in 12/05/13
    26525100003
    [56] † Nortedelphys jasoni
    Last Modified in 12/05/13
    14645800003
    [57] † Nortedelphys magnus
    Last Modified in 12/05/13
    13656000003
    [58] † Nortedelphys minimus
    Last Modified in 12/05/13
    38403700003
    [59] † Oklatheridium szalayi
    Last Modified in 12/05/13
    39393800003
    [60] † Pappotherium pattersoni
    Last Modified in 12/05/13
    30484700003
    [61] † Pariadens kirklandi
    Last Modified in 12/05/13
    20585400003
    [62] † Pariadens mckennai
    Last Modified in 12/05/13
    60181600003
    [63] † Pediomys elegans
    Last Modified in 12/05/13
    12666100003
    [64] † Peradectes californicus
    Last Modified in 12/05/13
    19595500003
    [65] † Peradectes chesteri
    Last Modified in 12/05/13
    26525100003
    [66] † Peradectes elegans
    Last Modified in 12/05/13
    10696100003
    [67] † Peradectes gulottai
    Last Modified in 12/05/13
    37414000003
    [68] Peradectes coprexeches
    Last Modified in 12/05/13
    14655800003
    [69] † Peradectes minor
    Last Modified in 12/05/13
    14646000003
    [70] † Peradectes protinnominatus
    Last Modified in 12/05/13
    14646200003
    [71] † Protalphadon foxi
    Last Modified in 12/05/13
    36453700003
    [72] † Protalphadon lulli
    Last Modified in 12/05/13
    18615500003
    [73] † Protolambda clemensi
    Last Modified in 12/05/13
    26524800003
    [74] † Protolambda florencae
    Last Modified in 12/05/13
    25534900003
    [75] † Protolambda hatcheri
    Last Modified in 12/05/13
    19605400003
    [76] † Pucadelphys andinus
    Last Modified in 12/05/13
    5736400003
    [77] † Roberthoffstetteria nationalgeographica
    Last Modified in 12/05/13
    11676400003
    [78] † Sinbadelphys schmidti
    Last Modified in 12/05/13
    26524700003
    [79] † Sulestes karakshi
    Last Modified in 12/05/13
    16636200003
    [80] † Swaindelphys cifellii
    Last Modified in 12/05/13
    14646000003
    [81] † Swaindelphys johansoni
    Last Modified in 12/05/13
    9696800003
    [82] † Swaindelphys encinensis
    Last Modified in 12/05/13
    14646100003
    [83] † Szalinia gracilis
    Last Modified in 12/05/13
    6736800003
    [84] † Thylacodon pusillus
    Last Modified in 12/05/13
    12666200003
    [85] Thylacodon montana sp. nov.
    Last Modified in 12/05/13
    9696600003
    [86] † Turgidodon lillegraveni
    Last Modified in 12/05/13
    36424100003
    [87] † Turgidodon madseni
    Last Modified in 12/05/13
    17615700003
    [88] † Turgidodon petiminis
    Last Modified in 12/05/13
    16625800003
    [89] † Turgidodon praesagus
    Last Modified in 12/05/13
    15645800003
    [90] † Turgidodon rhaister
    Last Modified in 12/05/13
    12666100003
    [91] † Turgidodon russelli
    Last Modified in 12/05/13
    7736800003
    [92] † Varalphadon crebreforme
    Last Modified in 12/05/13
    40383500003
    [93] † Varalphadon creber
    Last Modified in 12/05/13
    37423700003
    [94] † Varalphadon wahweapensis
    Last Modified in 12/05/13
    17625500003


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    Project overview2885
    Media views4301Media search (3777 views); M102598 (524 views);
    Taxon list15348
    Specimen list1892
    Matrix views2041Matrix landing page (1807 views); (5 views); Williamson et al 2012 matrix (229 views);
    Documents list1371
    Bibliography901
    Views for media list1119




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    Total downloads from project247
    Project downloads224
    Matrix downloads22 (5 downloads); Williamson et al 2012 matrix (17 downloads);
    Document downloads1Copyright information for exemplar media (1 download);