Project 4620: O. Lambert, G. Bianucci, M. Urbina. 2014. Huaridelphis raimondii, a new early Miocene Squalodelphinidae (Cetacea, Odontoceti) from the Chilcatay Formation, Peru. Journal of Vertebrate Paleontology. 34 (5):987-1004.
Specimen: Platanista (unvouchered)
View: illustration

Abstract

The fossil record of odontocetes (toothed cetaceans) is relatively scarce during the Oligocene and early Miocene compared with later in the Miocene and Pliocene; most of the odontocete families from these epochs are known by a limited number of species and specimens. Among those, Squalodelphinidae is a family of small- to medium-sized platanistoids with single-rooted teeth, which until now has included only four genera based on diagnostic material, from the early Miocene of Europe, Argentina, and North America. Recent field work in the Pisco-Ica desert, southern coast of Peru, has resulted in the discovery of several marine vertebrate-rich localities in various levels of the late Oligocene–early Miocene Chilcatay Formation. Based on three specimens from Ullujaya and Zamaca, including two well-preserved skulls with periotics, we describe a new squalodelphinid genus and species, Huaridelphis raimondii. This new species increases the early Miocene diversity of the family and is also its smallest known member. It further differs from other squalodelphinids by its thin antorbital process of the frontal, abruptly tapering rostrum, and higher tooth count. A more fragmentary skull, from Zamaca, is referred to Squalodelphinidae aff. H. raimondii. This skull provides information on the morphology of the tympanic, malleus, and incus, currently unknown in H. raimondii. Focusing on platanistoids with single-rooted teeth, our phylogenetic analysis suggests that Squalodelphinidae are monophyletic and confirms the sister-group relationship between the latter and Platanistidae. The relationships within Squalodelphinidae are not fully resolved, but H. raimondii might be one of the earliest diverging taxa.


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Article DOI: 10.1080/02724634.2014.858050

Project DOI: 10.7934/P4620, http://dx.doi.org/10.7934/P4620
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 19 Taxa
  • 1 Specimen
  • 37 Characters
Total size of project's media files: 234.83k

Download Project SDD File
Total scored cells: 546
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 37
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 79
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:37/0
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MorphoBank Project 4620

    Authors' Institutions

    • Royal Belgian Institute of Natural Sciences

    • University of Pisa

    • Museo de Historia Natural de Lima



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    19113700546
    (546, 0, 0)
    000


    Taxonomic Overview for Matrix 'M29228' (19 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] † Huaridelphis
    Taxon name last Modified on 04/03/23
    6313100001
    [2] † MUSM603
    Taxon name last Modified on 04/03/23
    13242400001
    [3] † Notocetus
    Taxon name last Modified on 04/03/23
    0373700001
    [4] † Squalodelphis
    Taxon name last Modified on 04/03/23
    5323200001
    [5] † Medocinia
    Taxon name last Modified on 04/03/23
    20171700001
    [6] † USNM475596
    Taxon name last Modified on 04/03/23
    22151500001
    [7] † Phocageneus
    Taxon name last Modified on 04/03/23
    22151500001
    [8] Platanista
    Taxon name last Modified on 04/03/23
    0373700001
    [9] † MUSM1611
    Taxon name last Modified on 04/03/23
    307700001
    [10] † Zarchachis
    Taxon name last Modified on 04/03/23
    2353500001
    [11] † Pomatodelphis
    Taxon name last Modified on 04/03/23
    2353500001
    [12] † Eurhinodelphis
    Taxon name last Modified on 04/03/23
    3343400001
    [13] † Xiphiacetus
    Taxon name last Modified on 04/03/23
    1383600001
    [14] † Ziphiodelphis
    Taxon name last Modified on 04/03/23
    2353500001
    [15] † Waipatia
    Taxon name last Modified on 04/03/23
    2353500001
    [16] † Squalodon
    Taxon name last Modified on 04/03/23
    2353500001
    [17] † Zygorhiza
    Taxon name last Modified on 04/03/23
    0373700001
    [18] † Allodelphis
    Taxon name last Modified on 04/03/23
    17202000001
    [19] † Zarhinocetus
    Taxon name last Modified on 04/03/23
    10272700001


    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project5
    Project downloads1
    Matrix downloads4Reconstructed data matrix (4 downloads);