Project 681: Per Christiansen. 2012. Phylogeny of the sabertoothed felids (Carnivora: Felidae: Machairodontinae). Cladistics. 29 (5):543-559.
Specimen: † Smilodon fatalis (LACMHC:2001-249)

Abstract

In recent years, advances in our understanding of feline relationships have cast light on their evolutionary history. In contrast, there have been no phylogenetic analyses on machairodont felids, rendering problematic evolutionary hypothesis based on the recent surge of studies on their craniomandibular morphology and functional anatomy. In this paper, I provide the first phylogenetic hypothesis of machairodont relationships based on 50 craniomandibular and dental characters from a wide range of sabercats spanning more 11 MYA. Exact searches produced 19 most parsimonious trees, and a strict consensus was well resolved. The Machairodontinae comprise a number of basal taxa (Promegantereon, Machairodus, Nimravides, Dinofelis, Metailurus) and a well supported clade of primarily Plio-Pleistocene taxa (Megantereon, Smilodon, Amphimachairodus, Homotherium, Xenosmilus) for which the name Eumachairodontia taxon novum is proposed. Previous phenetic grouping of machairodont taxa into three distinct groups, the Smilodontini, Homotherini, and Metailurini, was not supported by cladistic parsimony analysis, and forcing monophyly of these groups was significantly incompatible with character distribution. Machairodonts as a clade are not characterized by saberteeth, i.e., hypertrophied, bladelike upper canines, but by small lower canines, as well as small M1; and large P3 parastyle. True saberteeth arose later and are a synapomorphy of the Eumachairodontia.


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Project DOI: 10.7934/P681, http://dx.doi.org/10.7934/P681
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 2 Documents
  • 22 Taxa
  • 1 Specimen
  • 50 Characters
Total size of project's media files: 1 MB

Download Project SDD File
Total scored cells: 1080
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 50
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 125
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:50/0
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MorphoBank Project 681


    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Per Christiansen
    Project Administrator
    Last logged in 03/07/12
    220150001080
    (1080, 0, 0)
    000
    Maureen Admin
    Full membership
    Last logged in 11/04/13
    0000000
    (0, 0, 0)
    000
    MorphoBank Curator
    Full membership
    Last logged in 11/04/13
    0100000
    (0, 0, 0)
    000
    Seth Kaufman
    Full membership
    Last logged in Never
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M1583' (22 Taxa)

    taxon unscored
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    scored
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    NPA
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    "-" cellscell images labels on
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    [1] Canis lupus
    Last Modified in 12/05/13
    0505000004
    [2] Cryptoprocta ferox
    Last Modified in 12/05/13
    0505000004
    [3] † Dinictis felina
    Last Modified in 12/05/13
    0505000004
    [4] † Pseudaelurus ssp.
    Last Modified in 12/05/13
    0505000004
    [5] Metailurus major
    Last Modified in 12/05/13
    0505000004
    [6] † Metailurus parvulus
    Last Modified in 12/05/13
    0505000004
    [7] † Paramachairodus
    Last Modified in 12/05/13
    1494900004
    [8] † Machairodus aphanistus
    Last Modified in 12/05/13
    1494900004
    [9] † Nimravides ssp.
    Last Modified in 12/05/13
    2484800004
    [10] † Dinofelis cristata
    Last Modified in 12/05/13
    2484800004
    [11] † Dinofelis barlowi
    Last Modified in 12/05/13
    5454500004
    [12] † Dinofelis petteri
    Last Modified in 12/05/13
    5454500004
    [13] † Amphimachairodus giganteus
    Last Modified in 12/05/13
    0505000004
    [14] † Xenosmilus hodsonae
    Last Modified in 12/05/13
    2484800004
    [15] † Homotherium crenatidens
    Last Modified in 12/05/13
    0505000004
    [16] † Homotherium latidens
    Last Modified in 12/05/13
    1494900004
    [17] † Homotherium serum
    Last Modified in 12/05/13
    1494900004
    [18] † Megantereon cultridens
    Last Modified in 12/05/13
    0505000004
    [19] † Megantereon nihowanensis
    Last Modified in 12/05/13
    0505000004
    [20] † Megantereon whitei
    Last Modified in 12/05/13
    0505000004
    [21] † Smilodon fatalis
    Last Modified in 12/05/13
    0505000004
    [22] † Smilodon populator
    Last Modified in 12/05/13
    0505000004


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    Specimen list1915
    Taxon list6469
    Documents list1610
    Matrix views2009Matrix landing page (1811 views); Data saved from TNT (198 views);
    Bibliography765
    Views for media list1




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