Project 3766: M. Viglino, C. M. Gaetán, J. I. Cuitiño, M. R. Buono. 2020. First Toothless Platanistoid from the Early Miocene of Patagonia: the Golden Age of Diversification of the Odontoceti. Journal of Mammalian Evolution. epub ahead of print:none yet.
Specimen: Platanista gangetica (unvouchered)
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Abstract

Lower Miocene outcrops from Patagonia (Gaiman Formation, Burdigalian) may reveal more clues for the yet unknown aspects for this period in the evolution of odontocetes. Here, we present the first toothless platanistoid dolphin from the lower Miocene of Patagonia, Dolgopolis kinchikafiforo, gen. et sp. nov. The specimen includes an incomplete skull, with no mandibles or earbones, but sufficiently different from other named odontocetes to propose a new genus and species. Phylogenetic analyses indicate it is a platanistoid of uncertain position within the group, and that it shares some homoplastic characters with physeteroids and ziphioids. Given the absence of defined alveoli and teeth and an inferred moderately short and wide rostrum, we interpreted this new species as most likely a capture suction feeder. Based on our phylogenetic hypothesis, the optimization of feeding strategies recovered raptorial feeding as the plesiomorphic method, and convergent evolution of capture suction feeders in at least four lineages. Platanistoids recorded all feeding strategies during the late Oligocene-early Miocene, although raptorial is the predominant method. This suggests a partitioning of the ecological niches in the early phases of platanistoid evolution, as well as a high diversification of feeding methods previously underestimated for this period. Thus, ecological adaptations have a strong evolutionary pressure in odontocete communities and should be further explored.


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Article DOI: 10.1007/s10914-020-09505-w

Project DOI: 10.7934/P3766, http://dx.doi.org/10.7934/P3766
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 89 Taxa
  • 1 Specimen
  • 286 Characters
Total size of project's media files: 776.06k

Download Project SDD File
Total scored cells: 17601
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 286
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 733
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:286/0
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MorphoBank Project 3766

    Authors' Institutions

    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)

    • Instituto Patagónico de Geología y Paleontología, CCT CONICET-CENPAT



    Members

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    MorphoBank Curator
    Project Administrator
    89112860017601
    (17234, 0, 367)
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    Mariana Viglino
    Full membership
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    Taxonomic Overview for Matrix 'M26816' (89 Taxa)

    taxon unscored
    cells
    scored
    cells
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    NPA
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    [1] † Georgiacetus vogtlensis
    Taxon name last Modified on 07/13/20
    134140140012002
    [2] † Zygorhiza kochii
    Taxon name last Modified on 07/13/20
    68211208010002
    [3] † Archaeodelphis patrius
    Taxon name last Modified on 07/13/20
    165111111010002
    [4] † Xenorophus sloanii
    Taxon name last Modified on 07/13/20
    195868605002
    [5] † Agorophius pygmaeus
    Taxon name last Modified on 07/13/20
    14913413304002
    [6] † Patriocetus kazakhstanicus
    Taxon name last Modified on 07/13/20
    16611811703002
    [7] † Orycterocetus crocodilinus
    Taxon name last Modified on 07/13/20
    103177172011002
    [8] Physeter catodon
    Taxon name last Modified on 07/07/20
    13266262011002
    [9] Kogia breviceps
    Taxon name last Modified on 07/07/20
    11257255020002
    [10] Tasmacetus shepherdi
    Taxon name last Modified on 07/07/20
    1227327004002
    [11] Berardius bairdii
    Taxon name last Modified on 07/07/20
    1726726207002
    [12] Ziphius cavirostris
    Taxon name last Modified on 07/07/20
    927626809002
    [13] Mesoplodon ginkgodens
    Taxon name last Modified on 07/07/20
    3025024907002
    [14] † Xiphiacetus bossi
    Taxon name last Modified on 07/13/20
    5423422705002
    [15] † Simocetus rayi
    Taxon name last Modified on 07/13/20
    12915515502002
    [16] Lipotes vexillifer
    Taxon name last Modified on 07/07/20
    627827802002
    [17] † Parapontoporia sternbergi
    Taxon name last Modified on 07/13/20
    13015715303002
    [18] Inia geoffrensis
    Taxon name last Modified on 07/07/20
    5284271010002
    [19] Pontoporia blainvillei
    Taxon name last Modified on 07/07/20
    528127605002
    [20] † Pliopontos littoralis
    Taxon name last Modified on 07/13/20
    11017517105002
    [21] † Brachydelphis mazeasi
    Taxon name last Modified on 07/13/20
    9020119402002
    [22] † Kentriodon pernix
    Taxon name last Modified on 07/13/20
    6322522003002
    [23] † Atocetus iquensis
    Taxon name last Modified on 07/13/20
    6122422104002
    [24] † Hadrodelphis calvertense
    Taxon name last Modified on 07/13/20
    12215915905002
    [25] † Albireo whistleri
    Taxon name last Modified on 07/13/20
    5322922904002
    [26] † Denebola brachycephala
    Taxon name last Modified on 07/13/20
    13714714702002
    [27] Delphinapterus leucas
    Taxon name last Modified on 07/07/20
    528327605002
    [28] Monodon monoceros
    Taxon name last Modified on 07/07/20
    1127526708002
    [29] † Odobenocetops peruvianus
    Taxon name last Modified on 07/13/20
    107160160019002
    [30] † Australithax intermedia
    Taxon name last Modified on 07/13/20
    16611911901002
    [31] † Lomacetus ginsburgi
    Taxon name last Modified on 07/13/20
    17311211201002
    [32] † Miophocaena nishinoi
    Taxon name last Modified on 07/13/20
    200868600002
    [33] † Archaeophocaena teshioensis
    Taxon name last Modified on 07/13/20
    229555502002
    [34] † Pterophocaena nishinoi
    Taxon name last Modified on 07/13/20
    13415115101002
    [35] † Haborophocoena minutus
    Taxon name last Modified on 07/13/20
    17611010901002
    [36] † Haborophocoena toyoshimai
    Taxon name last Modified on 07/13/20
    11117417401002
    [37] † Piscolithax boreios
    Taxon name last Modified on 07/13/20
    13514914902002
    [38] † Piscolithax longirostris
    Taxon name last Modified on 07/13/20
    9419019002002
    [39] † Piscolithax tedfordi
    Taxon name last Modified on 07/13/20
    11017417402002
    [40] † Salumiphocaena stocktoni
    Taxon name last Modified on 07/13/20
    15313013003002
    [41] † Septemtriocetus bosselaersi
    Taxon name last Modified on 07/13/20
    196858505002
    [42] Phocoena sinus
    Taxon name last Modified on 07/07/20
    2126526203002
    [43] Phocoena spinipinnis
    Taxon name last Modified on 07/07/20
    1727426603002
    [44] Phocoena dioptrica
    Taxon name last Modified on 07/07/20
    7021921303002
    [45] Phocoena phocoena
    Taxon name last Modified on 07/07/20
    628627604002
    [46] Phocoenoides dalli
    Taxon name last Modified on 07/07/20
    1827926602002
    [47] Neophocaena phocaenoides
    Taxon name last Modified on 07/07/20
    1227927004002
    [48] Lissodelphis borealis
    Taxon name last Modified on 07/07/20
    2526625902002
    [49] Cephalorhynchus hectori
    Taxon name last Modified on 07/07/20
    1527026803002
    [50] Lagenorhynchus acutus
    Taxon name last Modified on 07/07/20
    3125325203002
    [51] Orcaella brevirostris
    Taxon name last Modified on 07/07/20
    3325224904002
    [52] Orcinus orca
    Taxon name last Modified on 07/07/20
    1527626605002
    [53] Feresa attenuata
    Taxon name last Modified on 07/07/20
    1826826404002
    [54] Globicephala macrorhynchus
    Taxon name last Modified on 07/07/20
    1826626305002
    [55] Grampus griseus
    Taxon name last Modified on 07/07/20
    2226526004002
    [56] † Hemisyntrachelus cortesii
    Taxon name last Modified on 07/13/20
    10617717604002
    [57] Peponocephala electra
    Taxon name last Modified on 07/07/20
    2426225804002
    [58] Pseudorca crassidens
    Taxon name last Modified on 07/07/20
    1727426405002
    [59] Delphinus delphis
    Taxon name last Modified on 07/07/20
    1327626904002
    [60] Lagenodelphis hosei
    Taxon name last Modified on 07/07/20
    2126826203002
    [61] Sousa chinensis
    Taxon name last Modified on 07/07/20
    3825424503002
    [62] Stenella attenuata
    Taxon name last Modified on 07/07/20
    1527826704002
    [63] Tursiops truncatus
    Taxon name last Modified on 07/07/20
    129728104002
    [64] Sotalia fluviatilis
    Taxon name last Modified on 07/07/20
    2226626103002
    [65] Steno bredanensis
    Taxon name last Modified on 07/07/20
    1527526704002
    [66] † Eodelphinus kabatensis
    Taxon name last Modified on 07/13/20
    15812912800002
    [67] † Papahu taitapu
    Taxon name last Modified on 07/13/20
    14913713601002
    [68] † Waipatia hectori
    Taxon name last Modified on 07/13/20
    239464502002
    [69] † Awamokoa tokarahi
    Taxon name last Modified on 07/13/20
    208807800002
    [70] † Waipatia maerewhenua
    Taxon name last Modified on 07/13/20
    8020320204002
    [71] † Otekaikea marplesi
    Taxon name last Modified on 07/13/20
    12416216101002
    [72] † Otekaikea huata
    Taxon name last Modified on 07/13/20
    11816816701002
    [73] † Squalodon calvertensis
    Taxon name last Modified on 07/13/20
    6721921603002
    [74] † Notocetus vanbenedeni
    Taxon name last Modified on 07/13/20
    7521120605002
    [75] † Squalodelphis fabianii
    Taxon name last Modified on 07/13/20
    18110610401002
    [76] † Prosqualodon davidis
    Taxon name last Modified on 07/13/20
    10318217706002
    [77] † Squaloziphius emlongi
    Taxon name last Modified on 07/13/20
    15612512406002
    [78] † Zarhachis flagellator
    Taxon name last Modified on 07/13/20
    7821120503002
    [79] † Pomatodelphis inaequalis
    Taxon name last Modified on 07/13/20
    11216716707002
    [80] Platanista gangetica
    Taxon name last Modified on 07/07/20
    1727026306002
    [81] † Phocageneus venustus
    Taxon name last Modified on 07/13/20
    252353400002
    [82] † Papahu sp zmt 73
    Taxon name last Modified on 07/13/20
    242444400002
    [83] † OU 22670
    Taxon name last Modified on 07/13/20
    231575500002
    [84] † Phoberodon arctirostris
    Taxon name last Modified on 07/13/20
    13714914702002
    [85] † OU 21798
    Taxon name last Modified on 07/13/20
    8221220400002
    [86] † Aondelphis talen
    Taxon name last Modified on 07/13/20
    220646402002
    [87] † Dolgopolis kinchikafiforo
    Taxon name last Modified on 07/13/20
    1779998011002
    [88] † Inticetus vertizi
    Taxon name last Modified on 07/13/20
    14514614100002
    [89] † Prosqualodon australis
    Taxon name last Modified on 07/13/20
    186999901002


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