Project 3264: S. López-Torres, M. T. Silcox, P. A. Holroyd. 2018. New omomyoids (Euprimates, Mammalia) from the late Uintan of southern California, USA, and the question of the extinction of the Paromomyidae (Plesiadapiformes, Primates). Palaeontologia electronica. 21.3:21.3.37A.
Specimen: † Trogolemur myodes (AMNH:12599)
View: lateral jaw

Abstract

Paromomyidae has been thought to represent the longest-lived group of stem primates (plesiadapiforms), extending from the early Paleocene to late Eocene. We analyzed primate material from the late-middle Eocene of southern California that had initially been ascribed to cf. Phenacolemur shifrae. This material falls at the lowest end of the size range for the family. The Californian specimens also exhibit several dental features that are atypical for paromomyids, such as a strong paraconid on the third lower molar, and differ from early Eocene species of Phenacolemur in lacking a distally expanded distolingual basin on upper molars. This combination of traits is more typical of earlier paromomyids with more plesiomorphic morphologies (e.g., Paromomys) and as such is inconsistent with the late age of these specimens. The purported paromomyids Ph. shifrae and Ignacius mcgrewi known in deposits of similar age are comparably tiny and share many of the characteristics found in the southern California material that distinguish them from typical early Eocene paromomyids. However, these traits are shared with some trogolemurin omomyoid euprimates that are of similar size. We argue that the material from southern California, along with Ph. shifrae and I. mcgrewi, should be transferred to a new genus of trogolemurin omomyoid. Purported European records of paromomyids later than the earliest middle Eocene are reconsidered and found to be non-diagnostic. After the early middle Eocene, only a single tooth of a paromomyid can be confirmed, indicating that the group suffered near extinction, possibly correlated with the Early Eocene Climatic Optimum.


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Article DOI: 10.26879/756

Project DOI: 10.7934/P3264, http://dx.doi.org/10.7934/P3264
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 66 Taxa
  • 1 Specimen
  • 303 Characters
Total size of project's media files: 2.32M

Download Project SDD File
Total scored cells: 11985
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 303
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 827
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:303/0
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MorphoBank Project 3264

    Authors' Institutions

    • University of California Berkeley

    • University of Toronto

    • Polish Academy of Sciences



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Sergi López-Torres
    Project Administrator
    1110000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M27157' (66 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Scandentia
    Last Modified in 12/28/20
    330929208001
    [2] Plesiadapis/Pronothodectes
    Last Modified in 12/28/20
    23260258022001
    [3] Purgatorius spp
    Last Modified in 12/28/20
    15414814801001
    [4] Plesiolestes problematicus
    Last Modified in 12/28/20
    12617517403001
    [5] Chronolestes simul
    Last Modified in 12/28/20
    11218618605001
    [6] Adapis parisiensis
    Last Modified in 12/28/20
    1928127905001
    [7] Notharctus sp.
    Last Modified in 12/28/20
    4928325301001
    [8] Donrussellia sp.
    Last Modified in 12/28/20
    15415514801001
    [9] Leptadapis magnus
    Last Modified in 12/28/20
    7922122004001
    [10] Mahgarita stevensi
    Last Modified in 12/28/20
    95201198010001
    [11] Pronycticebus gaudryi
    Last Modified in 12/28/20
    11219018902001
    [12] Galagoides demidoff
    Last Modified in 12/28/20
    5286286012001
    [13] Lemur catta
    Last Modified in 12/28/20
    2289289012001
    [14] Microcebus murinus
    Last Modified in 12/28/20
    4282282017001
    [15] Absarokius sp.
    Last Modified in 12/28/20
    12618217205001
    [16] Uintanius ameghini
    Last Modified in 12/28/20
    14715815303001
    [17] Anaptomorphus sp.
    Last Modified in 12/28/20
    15614613908001
    [18] Anemorhysis savagei
    Last Modified in 12/28/20
    14615815304001
    [19] Anemorhysis sublettensis
    Last Modified in 12/28/20
    233707000001
    [20] Anemorhysis wortmani
    Last Modified in 12/28/20
    207909006001
    [21] Anemorhysis natronensis
    Last Modified in 12/28/20
    204939306001
    [22] Arapahovius gazini
    Last Modified in 12/28/20
    11519618602001
    [23] Aycrossia lovei
    Last Modified in 12/28/20
    13916715806001
    [24] Dyseolemur pacificus
    Last Modified in 12/28/20
    12118318002001
    [25] Washakius insignis
    Last Modified in 12/28/20
    12419017801001
    [26] Hemiacodon gracilis
    Last Modified in 12/28/20
    8722821303001
    [27] Loveina zephyri
    Last Modified in 12/28/20
    15615414502001
    [28] Loveina sheai
    Last Modified in 12/28/20
    213919000001
    [29] Loveina minuta
    Last Modified in 12/28/20
    252515100001
    [30] Loveina wapitiensis
    Last Modified in 12/28/20
    215888800001
    [31] Macrotarsius montanus
    Last Modified in 12/28/20
    20110310101001
    [32] Microchoerus erinaceus
    Last Modified in 12/28/20
    9120620408001
    [33] Nannopithex sp.
    Last Modified in 12/28/20
    10920018905001
    [34] Melaneremia bryanti
    Last Modified in 12/28/20
    19111011002001
    [35] Necrolemur antiquus
    Last Modified in 12/28/20
    5124824309001
    [36] Omomys sp.
    Last Modified in 12/28/20
    8522721602001
    [37] Pseudoloris parvulus
    Last Modified in 12/28/20
    12517517206001
    [38] Rooneyia viejaensis
    Last Modified in 12/28/20
    2031029802001
    [39] Shoshonius cooperi
    Last Modified in 12/28/20
    10021520003001
    [40] Steinius vespertinus
    Last Modified in 12/28/20
    14816215302001
    [41] Teilhardina americana
    Last Modified in 12/28/20
    13218617001001
    [42] Teilhardina belgica
    Last Modified in 12/28/20
    14516915701001
    [43] Teilhardina asiatica
    Last Modified in 12/28/20
    11220118902001
    [44] Altanius orlovi
    Last Modified in 12/28/20
    14416415801001
    [45] Tetonius sp.
    Last Modified in 12/28/20
    9322420703001
    [46] Tetonoides sp.
    Last Modified in 12/28/20
    15116514903001
    [47] † Trogolemur myodes
    Last Modified in 12/28/20
    14715315006001
    [48] Trogolemur amplior
    Last Modified in 12/28/20
    235636305001
    [49] Trogolemur fragilis
    Last Modified in 12/28/20
    258444401001
    [50] Trogolemur leonardi
    Last Modified in 12/28/20
    274282801001
    [51] Sphacorhysis burntforkensis
    Last Modified in 12/28/20
    205939305001
    [52] Walshina esmaraldensis
    Last Modified in 12/28/20
    218848401001
    [53] Walshina mcgrewi
    Last Modified in 12/28/20
    234686801001
    [54] Walshina shifrae
    Last Modified in 12/28/20
    237656501001
    [55] Eosimias sp.
    Last Modified in 12/28/20
    11019619102001
    [56] Tarsius sp.
    Last Modified in 12/28/20
    629329007001
    [57] Aegyptopithecus zeuxis
    Last Modified in 12/28/20
    48242242013001
    [58] Apidium phiomense
    Last Modified in 12/28/20
    4725224907001
    [59] Catopithecus browni
    Last Modified in 12/28/20
    61231231011001
    [60] Parapithecus grangeri
    Last Modified in 12/28/20
    14415615504001
    [61] Aotus trivirgatus
    Last Modified in 12/28/20
    4296288011001
    [62] Callicebus moloch
    Last Modified in 12/28/20
    3292290010001
    [63] Dolichocebus gaimanensis
    Last Modified in 12/28/20
    16013513508001
    [64] Saimiri sciureus
    Last Modified in 12/28/20
    3297290010001
    [65] Proteopithecus sylviae
    Last Modified in 12/28/20
    14216015902001
    [66] Strigorhysis sp.
    Last Modified in 12/28/20
    14815414807001


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    Specimen list486
    Taxon list2794
    Bibliography186
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