Project 380: T. Kimura, Y. Hasegawa. 2010. A new baleen whale (Mysticeti: Cetotheriidae) from the earliest late Miocene of Japan and a reconsideration of the phylogeny of cetotheres. Journal of Vertebrate Paleontology. 30 (2):577-591.
Specimen: † Joumocetus shimizui (GMNH/PV:2401)
View: dorsal skull

Abstract

A new, well-preserved mysticete fossil is described and diagnosed here as Joumocetus shimizui, gen. et sp. nov. The holotype specimen was recovered from the earliest Late Miocene, Haraichi Formation, Annaka Group, Gunma Prefecture, Japan. Although many cetotheres have been found from the Pacific realm, the Cetototheriidae sensu stricto is relatively rare in terms of taxonomic diversity and also abundance of specimens. Joumocetus will be the fourth genus of the Cetotheriidae sensu stricto from the Pacific and the geologically earliest and most archaic Cetotheriidae sensu stricto yet reported. Joumocetus retains a number of primitive characteristics, and our phylogenetic analysis indicates that Joumocetus is
placed basally among the Cetotheriidae sensu stricto. Our analysis clearly indicates a monophyly of the Cetotheriidae sensu stricto and of a clade that consists of Balaenopteridae, Eschrichtiidae, and cetotheres. The results also indicate the monophyly of the following two groups: cetotheres not belong to Cetotheriidae sensu stricto (=Isanacetus-group) and Cetotheriidae sensu lato (= Isanacetus-group + Cetotheriidae sensu stricto); however, the monophylies of these groups are not well supported by bootstrap analysis. Consequently, the relationships and definition of thesemysticete taxa remain unclear. Based on the present study and a review of previous studies, we suggest that the Isanacetus-group is a paraphyletic taxon that includes the ancestors of two clades, Balaenopteridae + Eschrichtiidae and the Cetotheriidae sensu stricto.


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Project DOI: 10.7934/P380, http://dx.doi.org/10.7934/P380
This project containsMatrices
  • 3 Media
  • 1 Matrix
  • 19 Taxa
  • 1 Specimen
  • 164 Characters
Total size of project's media files: 3 MB

Download Project SDD File
Total scored cells: 2284
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 164
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 802
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:164/0
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MorphoBank Project 380


    Members

    member name taxa specimens media chars character
    media
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    (scored, NPA, "-")
    cell
    medialabels
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    Tosh Kimura
    Project Administrator
    Last logged in 11/07/10
    1800164002284
    (2257, 0, 27)
    000
    Maureen Admin
    Full membership
    Last logged in 11/16/10
    1130000
    (0, 0, 0)
    000
    MorphoBank Curator
    Full membership
    Last logged in 08/11/14
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M999' (17 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
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    NPA
    cells
    "-" cellscell images labels on
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    member
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    [1] Zygorhiza
    Last Modified in 12/05/13
    1215115101003
    [2] Aetiocetus c
    Last Modified in 12/05/13
    5910610500003
    [3] Eomysticetus w
    Last Modified in 12/05/13
    5311211100003
    [4] Cetotherium r
    Last Modified in 12/05/13
    67969601003
    [5] Piscobalaena
    Last Modified in 12/05/13
    1415014901003
    [6] Pelocetus
    Last Modified in 12/05/13
    2413713703003
    [7] Cophocetus
    Last Modified in 12/05/13
    5910510500003
    [8] Aglaocetus p
    Last Modified in 12/05/13
    4511911900003
    [9] Diorocetus
    Last Modified in 12/05/13
    2514013900003
    [10] Isanactus
    Last Modified in 12/05/13
    4212012002003
    [11] Megaptera
    Last Modified in 12/05/13
    715615502003
    [12] Balaenoptera acutorostrata
    Last Modified in 12/05/13
    216016002003
    [13] Balaenoptera physalus
    Last Modified in 12/05/13
    416015802003
    [14] Eschrichtius
    Last Modified in 12/05/13
    216116002003
    [15] Caperea
    Last Modified in 12/05/13
    1214814804003
    [16] Eubalaena
    Last Modified in 12/05/13
    515315306003
    [17] Joumocetus
    Last Modified in 12/05/13
    80838301003


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    Views for media list2423
    Specimen list1824
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    Bibliography652




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