Project 4126: T. R. Lyson, H. Petermann, N. Toth, S. Bastien, I. M. Miller. 2021. A new baenid turtle, Palatobaena knellerorum sp. nov., from the lower Paleocene (Danian) Denver Formation of south-central Colorado, U.S.A. Journal of Vertebrate Paleontology. 41 (2):null.
Specimen: † Palatobaena cohen (unvouchered)
View: dorsal and ventral views

Abstract

Baenidae are the most diverse clade of turtles from the latest Cretaceous and earliest Paleogene of North America. Palatobaena species have a distinctive cranial bauplan within baenid turtles and we herein describe a new species, P. knellerorum, based on a complete cranium from the lower Paleocene Denver Formation in the Denver Basin, Colorado. Palatobaena knellerorum differs from other Palatobaena species in the extreme degree of its dorsally oriented orbits, as well as the presence of a broad pentagonal midline crest formed by the supraoccipital and parietals. It can be further diagnosed from other species of Palatobaena by the following unique combination of characters: having a broadly rounded cranium, presence of upper temporal emargination that extends well anterior to the otic chamber, a broad exposure of the supraoccipital on the dorsal skull roof, a broadly rounded ‘tongue groove’ between the maxillae and premaxillae, and a deeply emarginated nasal region that exposes the underlying premaxillae in dorsal view. Palatobaena knellerorum most closely resembles the Maastrichtian/Danian taxon Palatobaena cohen and the Danian taxon P. bairdi. A phylogenetic analysis places P. knellerorum as sister to P. bairdi, and these taxa are sister to P. cohen. Palatobaena knellerorum overlaps in time with P. cohen, but the two are separated geographically with P. knellerorum restricted to the Denver Basin and P. cohen restricted to the Williston Basin. Cranial anatomical data and sedimentological data suggest Palatobaena spp. were bottom dwelling turtles living in shallow water environments that used a putative proboscis to prey upon freshwater-shelled invertebrates.


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Article DOI: 10.1080/02724634.2021.1925558

Project DOI: 10.7934/P4126, http://dx.doi.org/10.7934/P4126
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 30 Taxa
  • 1 Specimen
  • 106 Characters
Total size of project's media files: 16.37k

Download Project SDD File
Total scored cells: 2190
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 106
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 229
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:106/0
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MorphoBank Project 4126
  • Creation Date:
    18 November 2021
  • Publication Date:
    18 November 2021
  • Project views: 181

    This research
    supported by

    Authors' Institutions

    • Denver Museum of Nature and Science



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    3011106002190
    (2190, 0, 0)
    000
    Tyler Lyson
    Full membership
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M27711' (30 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
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    [1] † Proganochelys
    Last Modified in 11/18/21
    1096960000none
    [2] † Kayantechelys
    Last Modified in 11/18/21
    61001000000none
    [3] † Dinochelys whitei
    Last Modified in 11/18/21
    3571710000none
    [4] † Compsemys victa
    Last Modified in 11/18/21
    1690900000none
    [5] † Uluops uluops
    Last Modified in 11/18/21
    5353530000none
    [6] † Dorsetochelys
    Last Modified in 11/18/21
    5650500000none
    [7] † Pleurosternon
    Last Modified in 11/18/21
    2086860000none
    [8] † Glyptops plicatulus
    Last Modified in 11/18/21
    51011010000none
    [9] † Arundelemys dardeni
    Last Modified in 11/18/21
    5452520000none
    [10] † Trinitichelys hiatti
    Last Modified in 11/18/21
    2185850000none
    [11] † Neurankylus exemius
    Last Modified in 11/18/21
    1591910000none
    [12] † Hayemys latifrons
    Last Modified in 11/18/21
    5947470000none
    [13] † Denizenemys ornata
    Last Modified in 11/18/21
    7234340000none
    [14] † Plesiobaena antiqua
    Last Modified in 11/18/21
    01071060000none
    [15] † Peckemys brinkman
    Last Modified in 11/18/21
    3571710000none
    [16] † Cedrobaena putorius
    Last Modified in 11/18/21
    6245440000none
    [17] † Gammerabaena sonsalla
    Last Modified in 11/18/21
    6244440000none
    [18] † Palatobaena cohen
    Last Modified in 11/18/21
    1492920000none
    [19] † Palatobaena bairdi
    Last Modified in 11/18/21
    4759590000none
    [20] † Palatobaena gaffneyi
    Last Modified in 11/18/21
    5254540000none
    [21] † Denizenemys nodosa
    Last Modified in 11/18/21
    7234340000none
    [22] † Boremys pulchra
    Last Modified in 11/18/21
    41021020000none
    [23] † Boremys grandis
    Last Modified in 11/18/21
    6541410000none
    [24] † Eubaena cephalica
    Last Modified in 11/18/21
    4661600000none
    [25] † "Baena" hatcheri
    Last Modified in 11/18/21
    41091020000none
    [26] † Saxochelys gilberti
    Last Modified in 11/18/21
    41051020000none
    [27] † Stygiochelys estesi
    Last Modified in 11/18/21
    5056560000none
    [28] † Baena arenosa
    Last Modified in 11/18/21
    898980000none
    [29] † Chisternon undatum
    Last Modified in 11/18/21
    41021020000none
    [30] † Palatobaena sp.
    Last Modified in 11/18/21
    5254540000none


    Project views

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    Total project views181
    Media views37Media search (32 views); M824260 (5 views);
    Project overview22
    Matrix views17Matrix landing page (17 views);
    Bibliography8
    Views for media list10
    Specimen list19
    Taxon list68




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