Project 4125: J. E. Cohen, B. M. Davis, R. L. Cifelli. 2020. Geologically Oldest Pediomyoidea (Mammalia, Marsupialiformes) from the Late Cretaceous of North America, with Implications for Taxonomy and Diet of Earliest Late Cretaceous Mammals. Journal of Vertebrate Paleontology. 40 (5):e1835935.
Specimen: † Didelphodon (unvouchered)
View: fossil

Abstract

Terrestrial faunas of Turonian age are poorly known due to the paucity of the fossil record in North America and globally. The Smoky Hollow Member of the Straight Cliffs Formation, southern Utah, has yielded a rich assemblage of terrestrial vertebrates; among these, we herein recognize the geologically oldest members of Pediomyoidea. Two new species, Scalaria martini, gen. et sp. nov. and Scalaria aquilana, gen. et sp. nov., are recovered as members of Aquiladelphidae, sharing upper molar characters such as a subdivided B cusp, round and inflated cusps, and an anteroposteriorly expanded protocone. A fragmentary specimen is recognized as an indeterminate pediomyid with morphological similarities to Leptalestes. The occurrence of these distinctive groups in the Turonian prompted a re-evaluation of possible antecedents from earlier faunas, and a review of specimens referred to Aquiladelphidae. A phylogenetic analysis suggests that the Cenomanian tribosphenidan Dakotadens may belong within Aquiladelphidae. Of specimens referred to Aquiladelphidae, we recognize Aquiladelphis laurae as a valid species within the genus, and describe a new species of Aquiladelphis from the Judith River Formation of Montana, Aquiladelphis analetris, sp. nov. Two specimens from the ‘Edmontonian’ Williams Fork Formation, previously identified as Aquiladelphis, are here referred to a new species of Glasbius, G. piceanus, sp. nov. The presence of dentally derived marsupialiforms in the Turonian suggests that ecological drivers credited with dietary specializations among later Cretaceous taxa, such as proliferation of angiosperms and pollinating insects, were at work earlier than previously thought.


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Article DOI: 10.1080/02724634.2020.1835935

Project DOI: 10.7934/P4125, http://dx.doi.org/10.7934/P4125
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 59 Taxa
  • 1 Specimen
  • 156 Characters
Total size of project's media files: 29.69k

Download Project SDD File
Total scored cells: 4531
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 156
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 367
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:141/15
Currently Viewing:
MorphoBank Project 4125
  • Creation Date:
    18 November 2021
  • Publication Date:
    22 December 2021
  • Project views: 673

    This research
    supported by

    Authors' Institutions

    • University of Louisville

    • University of Oklahoma

    • Loyola Marymount University



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    5911156004531
    (4531, 0, 0)
    000
    Richard Cifelli
    Full membership
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M27710' (59 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
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    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] † Amphitherium
    Last Modified in 12/22/21
    7977770000none
    [2] † Peramus
    Last Modified in 11/18/21
    9165650000none
    [3] † Vincelestes
    Last Modified in 11/18/21
    41521520000none
    [4] † Aegialodon
    Last Modified in 12/22/21
    14412120000none
    [5] † Kielantherium
    Last Modified in 11/18/21
    10355530000none
    [6] † Potamotelses
    Last Modified in 11/18/21
    11541410000none
    [7] † Comanchea
    Last Modified in 11/18/21
    13125250000none
    [8] † Slaughteria
    Last Modified in 11/18/21
    13818180000none
    [9] † Trinititherium
    Last Modified in 11/18/21
    14215140000none
    [10] † Kermackia
    Last Modified in 11/18/21
    11344430000none
    [11] † Picopsis
    Last Modified in 11/18/21
    12335330000none
    [12] † Holoclemensia
    Last Modified in 11/18/21
    10848480000none
    [13] † Pappotherium
    Last Modified in 11/18/21
    11640400000none
    [14] † Deltatheridium
    Last Modified in 12/22/21
    221351340000none
    [15] † Deltatheroides
    Last Modified in 11/18/21
    8769690000none
    [16] † Tsagandelta
    Last Modified in 11/18/21
    12631300000none
    [17] † Oklatheridium
    Last Modified in 11/18/21
    11641400000none
    [18] † Sulestes
    Last Modified in 11/18/21
    6295940000none
    [19] † Atokatheridium
    Last Modified in 11/18/21
    11542410000none
    [20] † Nanocuris
    Last Modified in 11/18/21
    10750490000none
    [21] † Gurlin
    Last Modified in 11/18/21
    521041040000none
    [22] † Pariadens
    Last Modified in 11/18/21
    11443420000none
    [23] † Kokopellia
    Last Modified in 11/18/21
    10057560000none
    [24] † Falepetrus
    Last Modified in 11/18/21
    13323230000none
    [25] † Zygiocuspis
    Last Modified in 11/18/21
    13323230000none
    [26] † Anchistodelphys
    Last Modified in 11/18/21
    11246440000none
    [27] † Iugomortiferum
    Last Modified in 11/18/21
    11640400000none
    [28] † Aenigmadelphys
    Last Modified in 11/18/21
    10947470000none
    [29] † Didelphodon
    Last Modified in 12/22/21
    431141130000none
    [30] † Eodelphis
    Last Modified in 12/22/21
    6792890000none
    [31] † Pediomys
    Last Modified in 12/22/21
    511101050000none
    [32] † Albertatherium
    Last Modified in 11/18/21
    11542410000none
    [33] † Alphadon
    Last Modified in 12/22/21
    8076760000none
    [34] † Turgidodon
    Last Modified in 11/18/21
    7385830000none
    [35] † Glasbius
    Last Modified in 12/22/21
    9761590000none
    [36] † Asiatherium
    Last Modified in 11/18/21
    391221170000none
    [37] † Mayulestes
    Last Modified in 11/18/21
    231331330000none
    [38] Borhyaenids
    Last Modified in 11/18/21
    41541520000none
    [39] † Pucadelphys
    Last Modified in 11/18/21
    91471470000none
    [40] † Andinodelphys
    Last Modified in 11/18/21
    281311280000none
    [41] † Jaskhadelphys
    Last Modified in 11/18/21
    12828280000none
    [42] Marmosa
    Last Modified in 12/22/21
    01561560000none
    [43] Didelphis
    Last Modified in 12/22/21
    01561560000none
    [44] Dasyurids
    Last Modified in 12/22/21
    01571560000none
    [45] † Dromiciops
    Last Modified in 12/22/21
    51511510000none
    [46] † Prokennalestes
    Last Modified in 11/18/21
    481101080000none
    [47] † Bobolestes
    Last Modified in 11/18/21
    9264640000none
    [48] † Asioryctes
    Last Modified in 11/18/21
    81491480000none
    [49] † Kennalestes
    Last Modified in 11/18/21
    161411400000none
    [50] † Zalambdalestes
    Last Modified in 11/18/21
    51561510000none
    [51] † Aspanlestes
    Last Modified in 11/18/21
    6591910000none
    [52] Leptictids
    Last Modified in 11/18/21
    01561560000none
    [53] † Fumodelphodon
    Last Modified in 11/18/21
    13521210000none
    [54] † Hoodootherium
    Last Modified in 11/18/21
    12432320000none
    [55] † Aquiladelphis
    Last Modified in 11/18/21
    11244440000none
    [56] Scalaria
    Last Modified in 12/22/21
    11146450000none
    [57] † Dakotadens
    Last Modified in 11/18/21
    11937370000none
    [58] † Protolambda
    Last Modified in 11/18/21
    10848480000none
    [59] † Leptalestes
    Last Modified in 12/22/21
    10848480000none


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    Views for media list35
    Specimen list66
    Taxon list344




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