Project 1144: B. D. Rankin, P. A. Holroyd. 2014. Aceroryctes dulcis, a new palaeoryctid from the early Eocene of the Wasatch Formation of southwestern Wyoming. Canadian Journal of Earth Sciences. 51:919–926.
Specimen: † Aceroryctes dulcis (UCMP/UCMP:131849)

Abstract

The Palaeoryctidae are a group of small-bodied, likely insectivorous mammals known principally from the Paleocene and early Eocene (from approximately 65 to 53 Ma) of North America. Here we report on a new palaeoryctid from the early Eocene (early Wasatchian (Wa3) North American Land Mammal Age) Main Body of the Wasatch Formation, Washakie Basin, near Bitter Creek station in southwestern Wyoming, USA. Acerorcytes dulcis gen. et sp. nov. is unique among palaeoryctids in having a double-rooted P2 with a small anterior cusp, P3 with pronounced para- and metastylar cusps and a reduced but conspicuous metacone, P4 with a weakly developed metacone and an anteroposteriorly compressed protocone, and M1-2 with deep ectoflexus and a sharp metastylar blade. A phylogenetic analysis based on 32 dental characters of the nine known North American palaeoryctid species, including Aceroryctes dulcis, recovered eight equally parsimonious cladograms. Similar to prior studies, the analysis suggests that the genus Palaeoryctes is non-monophyletic, with Palaeoryctes cruoris and Aaptoryctes ivyi closely related. Aceroryctes dulcis is grouped with Ottoryctes winkleri and positioned in a more inclusive clade with Eoryctes melanus; the remaining palaeoryctid taxa, including Lainoryctes youzwyshyni, are part of an unresolved polytomy. These new findings indicate that early Eocene palaeoryctids were more diverse than previously thought, with genus richness during the early Eocene at least as great as that during the middle Paleocene.


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Article DOI: http:// dx.doi.org/10.1139/cjes-2014-0101

Project DOI: 10.7934/P1144, http://dx.doi.org/10.7934/P1144
This project containsMatrices
  • 15 Media
  • 1 Matrix
  • 10 Taxa
  • 4 Specimens
  • 32 Characters
Total size of project's media files: 60 MB

Download Project SDD File
Total scored cells: 254
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 32
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 68
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:32/0
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MorphoBank Project 1144


    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Patricia Holroyd
    Project Administrator
    Last logged in 11/13/14
    104153200254
    (254, 0, 0)
    000
    MorphoBank Curator
    Full membership
    Last logged in 11/20/14
    0000000
    (0, 0, 0)
    000
    Brian Rankin
    Full membership
    Last logged in 10/21/14
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M2516' (10 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
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    NPA
    cells
    "-" cellscell images labels on
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    [1] † Aaptoryctes ivyi
    Last Modified in 06/08/14
    1313100003
    [2] † Asioryctes nemegetensis
    Last Modified in 08/27/14
    0323200003
    [3] † Eoryctes melanus
    Last Modified in 09/02/14
    6262600003
    [4] † Ottoryctes winkleri
    Last Modified in 06/08/14
    0323200003
    [5] † Palaeoryctes cruoris
    Last Modified in 06/08/14
    7252500003
    [6] † Palaeoryctes jepseni
    Last Modified in 06/08/14
    5292700003
    [7] † Palaeoryctes puercensis
    Last Modified in 06/08/14
    1313100003
    [8] † Palaeoryctes punctatus
    Last Modified in 06/08/14
    14181800003
    [9] † Aceroryctes dulcis
    Last Modified in 09/02/14
    16161600003
    [10] † Lainoryctes youzwyshyni
    Last Modified in 08/27/14
    18141400003


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    Bibliography717
    Specimen list2827
    Taxon list4647




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