Project 3151: C. S. Mongle, D. S. Strait, F. E. Grine. 2019. Expanded character sampling underscores phylogenetic stability of Ardipithecus ramidus as a basal hominin. Journal of Human Evolution. 131:28-39.
Specimen: † Ardipithecus ramidus (unvouchered)
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Abstract

Phylogenetic relationships among hominins provide a necessary framework for assessing their evolution. Reconstructing these relationships hinges on the strength of the character data analyzed. The phylogenetic position of Ardipithecus ramidus is critical to understanding early hominin evolution, and while many accept that it is most likely the sister taxon to all later hominins, others have argued that Ar. ramidus was ancestral to Pan. Although the study by Strait and Grine (2004) suggested the former, available evidence permitted only 26% of characters in their matrix to be assessed for Ar. ramidus. Fossils described subsequently by Suwa, White and colleagues in 2009 have enabled the number of characters that can be coded for this species to be expanded to 78% of the matrix. Here, we incorporate these new character data to evaluate their impact on the phylogenetic relationships of Ar. ramidus. Moreover, we have further revised the Strait and Grine (2004) matrix as necessitated by additions to the hypodigms of other fossil taxa. This updated matrix was analyzed using both parsimony and Bayesian techniques in a sequence of four iterative steps to independently evaluate the impact of matrix and expanded character revisions on tree topology. Despite the new data and matrix revisions, tree topology has remained remarkably stable. The addition of new craniodental material has served to markedly strengthen the support for the placement of Ar. ramidus as being derived relative to Sahelanthropus, and as the sister taxon of all later hominins. These findings support the phylogenetic hypothesis originally proposed by White and colleagues in 1994. This updated matrix provides a basis for the assessment of additional extinct species.


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Project DOI: 10.7934/P3151, http://dx.doi.org/10.7934/P3151
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 20 Taxa
  • 1 Specimen
  • 107 Characters
Total size of project's media files: 1 MB

Download Project SDD File
Total scored cells: 1739
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 107
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 319
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:11/96
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MorphoBank Project 3151

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    member name taxa specimens media media
    notes
    chars character
    notes  media
    labels
    cell scorings
    (scored, NPA, "-")
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    medialabels
    rules
    Carrie Mongle
    Project Administrator
    Last logged in 04/07/19
    2011110778001739
    (1739, 0, 0)
    000


    Taxonomic Overview for Matrix 'M25316' (20 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] Papio
    Last Modified in 04/17/18
    210510500001
    [2] Colobus
    Last Modified in 07/10/18
    210510500001
    [3] Hylobates
    Last Modified in 04/17/18
    110610600001
    [4] Pongo pygmaeus
    Last Modified in 04/17/18
    010710700001
    [5] Gorilla gorilla
    Last Modified in 04/17/18
    010710700001
    [6] Pan troglodytes
    Last Modified in 04/16/18
    010710700001
    [7] † Sahelanthropus tchadensis
    Last Modified in 04/20/18
    58494300001
    [8] † Ardipithecus ramidus
    Last Modified in 04/16/18
    24833100001
    [9] † Australopithecus anamensis
    Last Modified in 04/20/18
    75323200001
    [10] † Australopithecus afarensis
    Last Modified in 04/20/18
    41039700001
    [11] † Kenyanthropus platyops
    Last Modified in 04/20/18
    79282700001
    [12] † Australopithecus garhi
    Last Modified in 04/20/18
    78292800001
    [13] † Australopithecus africanus
    Last Modified in 04/20/18
    010710600001
    [14] † Paranthropus aethiopicus
    Last Modified in 04/20/18
    27808000001
    [15] † Paranthropus robustus
    Last Modified in 04/20/18
    510210100001
    [16] † Paranthropus boisei
    Last Modified in 04/20/18
    210510500001
    [17] † Homo habilis
    Last Modified in 04/20/18
    610110100001
    [18] † Homo rudolfensis
    Last Modified in 04/20/18
    30787000001
    [19] † Homo ergaster
    Last Modified in 04/20/18
    9989800001
    [20] Homo sapiens
    Last Modified in 04/16/18
    010710700001


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    Total project views971
    Project overview186
    Matrix views149Craniodental Character Matrix (34 views); Matrix landing page (115 views);
    Media views180Media search (157 views); M662130 (23 views);
    Taxon list232
    Specimen list82
    Bibliography83
    Views for media list59




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    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project51
    Project downloads36
    Matrix downloads15Craniodental Character Matrix (15 downloads);