Project 3335: J. N. Gelfo, D. A. García-López, L. P. Bergqvist. 2020. Phylogenetic relationships and palaeobiology of a new xenungulate (Mammalia: Eutheria) from the Palaeogene of Argentina. Journal of Systematic Palaeontology. 18 (12):993-1007.
Specimen: † Rodcania kakan (Paleontología Vertebrados Instituto MIguel Lillo/PVL: PVL 7583)
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Abstract

Xenungulates are a peculiar group of bilophodont ungulates, widespread over South America during the Paleocene and early Eocene. Here we describe, illustrate and analyse a new Xenungulata, Rodcania kakan gen. et sp. nov., the first from the lower latitudes of Argentina. It was recovered from the Río Loro Formation (Tucumán Province), for which a Paleocene age was estimated. The material comprises a fragment of the left dentary with an incomplete m2, eroded over the enamel surface, and an almost complete m3. Both teeth share with Xenungulata strong enamel, vertically oriented Hunter–Schreger bands (HSB), and wear facets sloping distally. Rodcania kakan differs from other xenungulates in the m3 trigonid, simplified and mesiodistally short; absence of a paraconid; more oblique protolophid in relation to the mesiodistal axis and a straight cristid obliqua, pointing to the protoconid position; and has a wider and longer talonid. A phylogenetic analysis of 13 species and 36 craniodental characters recovered R. kakan as a basal member of the Carodniidae, supported by 10 synapomorphies in the four most parsimonious trees. The body mass estimation of the Río Loro Fauna and of the rest of the xenungulate taxa revealed that R. kakan is the largest mammal of the Río Loro assemblage, weighing around 165 kg and with a size comparable to Carodnia feruglioi. The increase in body mass showed no clear relation with evolutionary trends in xenungulates.


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Article DOI: 10.1080/14772019.2020.1715496

Project DOI: 10.7934/P3335, http://dx.doi.org/10.7934/P3335
This project containsMatrices
  • 2 Media
  • 1 Matrix
  • 13 Taxa
  • 1 Specimen
  • 36 Characters
Total size of project's media files: 162.54M

Download Project SDD File
Total scored cells: 427
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 36
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 102
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:36/0
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MorphoBank Project 3335
  • Creation Date:
    19 November 2018
  • Publication Date:
    02 July 2020
  • Project views: 325

    Authors' Institutions

    • Universidade Federal do Rio De Janeiro (UFRJ)

    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)

    • Universidad Nacional de Tucumán

    • Fundación Miguel Lillo

    • Museo de La Plata

    • Universidad Nacional de la Plata



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Javier Gelfo
    Project Administrator
    Last logged in 11/22/19
    1110000
    (0, 0, 0)
    000
    MorphoBank Curator
    Full membership
    Last logged in 07/09/20
    12013600427
    (427, 0, 0)
    000


    Taxonomic Overview for Matrix 'M26812' (13 Taxa)

    taxon unscored
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    "-" cellscell images labels on
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    [1] † Alcidedorbignya inopinata
    Last Modified in 07/02/20
    0363600002
    [2] † Tiuclaenus minutus
    Last Modified in 07/02/20
    2353400002
    [3] † Asmithwoodwardia scotti
    Last Modified in 07/02/20
    0363500002
    [4] † Didolodus multicuspis
    Last Modified in 07/02/20
    1353400002
    [5] † Notoetayoa gargantuai
    Last Modified in 07/02/20
    15212100002
    [6] † Etayoa bacatensis
    Last Modified in 07/02/20
    1363500002
    [7] † Carodnia feruglioi
    Last Modified in 07/02/20
    8282800002
    [8] † Cardonia cf feruglioi
    Last Modified in 07/02/20
    6302900002
    [9] † Carodnia vieirai
    Last Modified in 07/02/20
    0363600002
    [10] † Carodnia inexpectans
    Last Modified in 07/02/20
    0363500002
    [11] † Rodcania kakan
    Last Modified in 07/02/20
    9272200002
    [12] † Trigonostylops wortmani
    Last Modified in 07/02/20
    1353300002
    [13] † Tetragonostylops apthomasi
    Last Modified in 07/02/20
    0363300002


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    Bibliography16
    Views for media list26
    Specimen list32
    Taxon list46
    Documents list1




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