Project 4786: A. M. Candela, N. A. Munoz, C. M. Garcia Esponda, S. F. Vizcaino. 2024. Evolutionary trends of caviomorph rodents as elucidated using their oldest foot anatomy. Papers in Palaeontology. 10 (6):e1606.
Specimen: † Bunohyrax fajumensis (unvouchered)
View: occlusal molar

Abstract

The Topernawi area of west Turkana, northern Kenya, preserves a number of recently discovered vertebrate fossil localities of mid-Oligocene age. The Topernawi fauna provides important new data on mammalian evolution in equatorial eastern Africa during the mid-Cenozoic. Here, we describe five new species of hyracoids from Topernawi: Nengohyrax josephi, Abdahyrax philipi, Geniohyus ewoii, Thyrohyrax lokutani, and Thyrohyrax ekaii. These species range in reconstructed body mass from ~8 to ~150 kg, comparable to the body size range that has been observed at other hyracoid-rich Paleogene sites. We use Bayesian tip-dating phylogenetic analyses to estimate hyracoid relationships. We find that non-Thyrohyrax species from Topernawi are members of Geniohyidae, a clade of bunodont, Paleogene hyracoids. Despite being approximately the same age as some of the youngest and best-sampled horizons in the Jebel Qatrani Formation (Fayum, northern Egypt), the Topernawi hyracoid fauna is distinct, and shows no overlap at the species level; it also shows no species overlap with the ~1.5-2.5 Ma younger Chilga localities in northern Ethiopia. The hyracoid assemblage from Topernawi adds to a growing body of evidence which suggests that certain distinctive clades known from earlier Oligocene horizons in northern Africa (Saghatherium, Selenohyrax, Titanohyrax) did not persist into the late Oligocene.


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Article DOI: 10.1002/spp2.1606

Project DOI: 10.7934/P4786, http://dx.doi.org/10.7934/P4786
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 33 Taxa
  • 3 Specimens
  • 413 Characters
Total size of project's media files: 346.09k

Download Project SDD File
Total scored cells: 6809
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 413
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 1065
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:200/213
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MorphoBank Project 4786

    This research
    supported by

    Authors' Institutions

    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)

    • Museo de La Plata

    • Universidad Nacional de la Plata (UNLP)



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Natasha Vitek
    Project Administrator
    3331413006809
    (6723, 0, 86)
    000


    Taxonomic Overview for Matrix 'M29392' (33 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
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    member
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    [1] † Ocepeia daouiensis
    Taxon name last Modified on 11/07/24
    180216207026001
    [2] † Eritherium azzouzorum
    Taxon name last Modified on 11/07/24
    22020819201001
    [3] † Phosphatherium escuilliei
    Taxon name last Modified on 11/07/24
    194212206013001
    [4] † Afrohyrax championi
    Taxon name last Modified on 11/07/24
    15526225701001
    [5] † Antilohyrax pectidens
    Taxon name last Modified on 11/07/24
    10031831102001
    [6] † Bunohyrax fajumensis
    Taxon name last Modified on 11/07/24
    18523422800001
    [7] † Bunohyrax major
    Taxon name last Modified on 11/07/24
    339747400001
    [8] † Dimaitherium patnaiki
    Taxon name last Modified on 11/07/24
    17824623401001
    [9] † Geniohyus diphycus
    Taxon name last Modified on 11/07/24
    26614614601001
    [10] † Geniohyus mirus
    Taxon name last Modified on 11/07/24
    331828200001
    [11] † Megalohyrax eocaenus
    Taxon name last Modified on 11/07/24
    15427725900001
    [12] † Megalohyrax sp. nov.
    Taxon name last Modified on 11/07/24
    16126924903001
    [13] † Microhyrax lavocati
    Taxon name last Modified on 11/07/24
    315999800001
    [14] † Namahyrax corvus
    Taxon name last Modified on 11/07/24
    3151019800001
    [15] † Pachyhyrax crassidentatus
    Taxon name last Modified on 11/07/24
    16825824500001
    [16] Procavia capensis
    Taxon name last Modified on 11/07/24
    3413392018001
    [17] † Prohyrax hendeyi
    Taxon name last Modified on 11/07/24
    21720419600001
    [18] † Saghatherium antiquum
    Taxon name last Modified on 11/07/24
    13229727902001
    [19] † Saghatherium bowni
    Taxon name last Modified on 11/07/24
    11931729202001
    [20] † Seggeurius amourensis
    Taxon name last Modified on 11/07/24
    28313112901001
    [21] † Selenohyrax chatrathi
    Taxon name last Modified on 11/07/24
    25616715700001
    [22] † Thyrohyrax domorictus
    Taxon name last Modified on 11/07/24
    12429828603001
    [23] † Thyrohyrax litholagus
    Taxon name last Modified on 11/07/24
    16226324803001
    [24] † Thyrohyrax meyeri
    Taxon name last Modified on 11/07/24
    13329827703001
    [25] † Thyrohyrax pygmaeus
    Taxon name last Modified on 11/07/24
    21419819801001
    [26] † Titanohyrax andrewsi
    Taxon name last Modified on 11/07/24
    328858500001
    [27] † Titanohyrax angustidens
    Taxon name last Modified on 11/07/24
    26714614600001
    [28] † Titanohyrax sp. nov.
    Taxon name last Modified on 11/07/24
    14627226502001
    [29] † Nengohyrax josephi
    Taxon name last Modified on 11/07/24
    28013413201001
    [30] † Abdahyrax philipi
    Taxon name last Modified on 11/07/24
    30710710501001
    [31] † Geniohyus ewoi
    Taxon name last Modified on 11/07/24
    30011611200001
    [32] † Thyrohyrax lokutani
    Taxon name last Modified on 11/07/24
    28313512901001
    [33] † Thyrohyrax ekaii
    Taxon name last Modified on 11/07/24
    27714013600001


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    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project3
    Matrix downloads2Character-Taxon matrix (2 downloads);
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