Project 4091: S. P. Zack, A. W. Poust, H. Wagner. 2022. Diegoaelurus, a new machaeroidine (Oxyaenidae) from the Santiago Formation (late Uintan) of southern California and the relationships of Machaeroidinae, the oldest group of sabertooth mammals. PeerJ. 10:e13032.
Specimen: † Diegoaelurus vanvalkenburghae (SDSNH:38343)
View: lateral

Abstract

Machaeroidinae is a taxonomically small clade of early and middle Eocene carnivorous mammals that includes the earliest known saber-toothed mammalian carnivores. Machaeroidine diversity is low, with only a handful of species described from North America and Asia. Here we report a new genus and species of machaeroidine, Diegoaelurus vanvalkenburghae, established on the basis of a nearly complete dentary with most of the dentition from the late Uintan (middle Eocene) portion of the Santiago Formation of southern California. The new taxon is the youngest known machaeroidine and provides the first evidence for the presence of multiple machaeroidine lineages, as it differs substantially from Apataelurus kayi, the only near-contemporaneous member of the group. Phylogenetic analysis indicates that Diegoaelurus is the sister taxon of Apataelurus, while older species are recovered as a monophyletic Machaeroides. Both phylogenetic results are relatively weakly supported. The new taxon extends the record of machaeroidines to the end of the Uintan, potentially tying machaeroidine extinction to the faunal turnover spanning the middle to late Eocene transition in North America.


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Article DOI: 10.7717/peerj.13032

Project DOI: 10.7934/P4091, http://dx.doi.org/10.7934/P4091
This project containsMatrices
  • 29 Media
  • 1 Matrix
  • 7 Taxa
  • 10 Specimens
  • 25 Characters
Total size of project's media files: 67.53M

Download Project SDD File
Total scored cells: 130
Total media associated with cells: 76
Total labels associated with cell media: 82
Characters
Total characters: 25
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 51
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:25/0
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MorphoBank Project 4091

    Authors' Institutions

    • Arizona State University

    • University of Arizona

    • University of California Berkeley

    • San Diego Natural History Museum



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Shawn Zack
    Project Administrator
    710292500130
    (126, 0, 4)
    76820
    Ashley Poust
    Full membership
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M27661' (7 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
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    [1] † Prototomus phobos
    Last Modified in 09/20/21
    122220200none
    [2] † Dipsalidictis krausei
    Last Modified in 09/20/21
    023230200none
    [3] † Machaeroides simpsoni
    Last Modified in 09/20/21
    8171001616none
    [4] † Machaeroides eothen
    Last Modified in 09/20/21
    0251002425none
    [5] † Apataelurus kayi
    Last Modified in 09/20/21
    8171001618none
    [6] † Apataelurus pishigouensis
    Last Modified in 09/20/21
    17810077none
    [7] † Diegoaelurus vanvalkenburghae
    Last Modified in 12/10/21
    11141001316none


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views4637
    Project overview392
    Matrix views153Matrix landing page (137 views); Diegoaelurus matrix (16 views);
    Media views2079Media search (400 views); M823670 (56 views); M823676 (55 views); M823681 (54 views); M823682 (56 views); M823683 (59 views); M823687 (60 views); M823688 (60 views); M823689 (62 views); M823690 (59 views); M823691 (59 views); M823692 (60 views); M823693 (60 views); M823758 (63 views); M823759 (58 views); M823760 (60 views); M823761 (57 views); M823762 (61 views); M823763 (57 views); M823764 (59 views); M823765 (55 views); M823766 (58 views); M834663 (56 views); M834664 (54 views); M834665 (57 views); M834666 (57 views); M834667 (54 views); M834668 (61 views); M834669 (54 views); M834670 (58 views);
    Bibliography400
    Views for media list386
    Specimen list827
    Taxon list398
    Documents list2




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project14
    Matrix downloads3Diegoaelurus matrix (3 downloads);
    Project downloads11