Project 567: P. E. Kondrashov, S. G. Lucas. 2012. Nearly Complete Skeleton of Tetraclaenodon (Mammalia, Phenacodontidae) from the Early Paleocene of New Mexico: Morpho-Functional Analysis. Journal of Paleontology. 86 (1):25-43.
Specimen: Loxolophus hyattianus (AMNH:16343)
View: Skull, dorsal

Abstract

We describe the relatively complete skeleton of Tetraclaenodon undoubtedly associated with its dentition, from the Torrejonian interval of the Nacimiento Formation in the San Juan Basin, New Mexico. Tetraclaenodon is the most primitive and oldest genus of the family Phenacodontidae and is very important for assessing the phylogenetic relationships of the family. The newly described skeleton belonged to a lightly built terrestrial mammal that could use trees for shelter. The structure of the ulna, manus, femur, crus, and pes corresponds to that of a typical terrestrial mammal, while morphological features such as the low greater tubercle of the humerus, long deltopectoral crest, pronounced lateral supracondylar crest, and hemispherical capitulum indicate some scansorial adaptations of Tetraclaenodon. The postcranial skeleton of Tetraclaenodon does not exhibit the cursorial adaptations seen in later phenacodontids and early perissodactyls. Phylogenetic analysis did not recover monophyletic “Phenacodontidae”; instead, phenacodontids formed a series of sister taxa to the Altungulata clade. Tetraclaenodon is the basal-most member of the “Phenacodontidae” + Altungulata clade.


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Project DOI: 10.7934/P567, http://dx.doi.org/10.7934/P567
This project containsMatrices
  • 5 Media
  • 1 Matrix
  • 2 Documents
  • 25 Taxa
  • 1 Specimen
  • 86 Characters
Total size of project's media files: 13 MB

Download Project SDD File
Total scored cells: 1826
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 86
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 210
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:86/0
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MorphoBank Project 567


    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
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    rules
    Peter Kondrashov
    Project Administrator
    Last logged in 08/09/11
    240086001826
    (1826, 0, 0)
    000
    Maureen Admin
    Full membership
    Last logged in Never
    0000000
    (0, 0, 0)
    000
    MorphoBank Curator
    Full membership
    Last logged in 03/11/12
    1150000
    (0, 0, 0)
    000
    Seth Kaufman
    Full membership
    Last logged in 08/31/11
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M1270' (24 Taxa)

    taxon unscored
    cells
    scored
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    support
    NPA
    cells
    "-" cellscell images labels on
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    [1] Protungulatum
    Last Modified in 12/05/13
    27595900004
    [2] Chriacus
    Last Modified in 12/05/13
    12747400004
    [3] Arctocyon
    Last Modified in 12/05/13
    0868600004
    [4] Arctocyonides
    Last Modified in 12/05/13
    6808000004
    [5] Loxolophus
    Last Modified in 12/05/13
    9777700004
    [6] Periptychus
    Last Modified in 12/05/13
    7797900004
    [7] Mithrandir
    Last Modified in 12/05/13
    14727200004
    [8] Ectoconus
    Last Modified in 12/05/13
    11757500004
    [9] Hyopsodus
    Last Modified in 12/05/13
    1858500004
    [10] Haplomylus
    Last Modified in 12/05/13
    19676700004
    [11] Apheliscus
    Last Modified in 12/05/13
    19676700004
    [12] Tetraclaenodon
    Last Modified in 12/05/13
    8787800004
    [13] Ectocion
    Last Modified in 12/05/13
    9777700004
    [14] Meniscotherium
    Last Modified in 12/05/13
    0868600004
    [15] Phenacodus
    Last Modified in 12/05/13
    3838300004
    [16] Homogalax
    Last Modified in 12/05/13
    7797900004
    [17] Hyracotherium
    Last Modified in 12/05/13
    0868600004
    [18] Diacodexis
    Last Modified in 12/05/13
    0878600004
    [19] Rhynchocyon
    Last Modified in 12/05/13
    4828200004
    [20] Procavia
    Last Modified in 12/05/13
    0868600004
    [21] Pleuraspidotherium
    Last Modified in 12/05/13
    5828100004
    [22] Orthaspidotherium
    Last Modified in 12/05/13
    21656500004
    [23] Moeritherium
    Last Modified in 12/05/13
    5828100004
    [24] Radinskya
    Last Modified in 12/05/13
    55323100004


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