Project 3698: A. M. Murray, D. B. Brinkman, D. G. DeMar, G. P. Wilson. 2020. Paddlefish and sturgeon (Chondrostei: Acipenseriformes: Polyodontidae and Acipenseridae) from lower Paleocene deposits of Montana, U.S.A. Journal of Vertebrate Paleontology. 40 (2):e1775091.
Specimen: † Engdahlichthys milviaegis (UWBM:UWBM 109829)
View: skull

Abstract

Paleocene deposits of the Tullock Member of the Fort Union Formation, Montana, U.S.A., have yielded several new specimens of †Polyodon tuberculata, a taxon previously described from the formation, as well as a new genus and species of sturgeon (Acipenseridae). The three new specimens of †P. tuberculata allow us to revise and to confirm previously reported features of the holotype, as well as to describe other features that were not preserved in the single specimen previously known. For example, we observe that (1) the left and right posttemporals overlie the left and right parietals to meet in the midline, (2) the posttemporal has a deep ventral flange, and (3) the parasphenoid extends farther posteriorly than the parietals. The new sturgeon is fairly small, and not well preserved. It can be distinguished from all other acipenserids by a combination of features, including kite-shaped dorsal scutes bearing a strong median ridge, lateral scutes that vary in shape from rhomboid to irregularly shaped elements, a large triangular scute behind the anal fin, and numerous small rhomboid scales covering the caudal skeleton. It cannot be included in any currently known genus and is here named †Engdahlichthys milviaegis, gen. et sp. nov.


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Article DOI: 10.1080/02724634.2020.1775091

Project DOI: 10.7934/P3698, http://dx.doi.org/10.7934/P3698
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 4 Documents
  • 20 Taxa
  • 1 Specimen
  • 62 Characters
Total size of project's media files: 6.46M

Download Project SDD File
Total scored cells: 1075
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 62
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 135
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:62/0
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MorphoBank Project 3698

    Authors' Institutions

    • National Museum of Natural History, Smithsonian Institution

    • University of Alberta

    • University of Washington



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Alison Murray
    Project Administrator
    0110000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M27261' (20 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
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    [1] † Boreosomus piveteaui
    Last Modified in 02/24/21
    17454500001
    [2] † Birgeria groenlandica
    Last Modified in 02/24/21
    15474700001
    [3] † Chondrosteus acipenseroides
    Last Modified in 02/24/21
    12505000001
    [4] † Peipiaosteus pani
    Last Modified in 02/24/21
    17454500001
    [5] Polyodon spathula
    Last Modified in 02/24/21
    6565600001
    [6] † Protopsephurus liui
    Last Modified in 02/24/21
    14484800001
    [7] † Priscosturion longipinnis
    Last Modified in 02/24/21
    16464600001
    [8] Huso huso
    Last Modified in 02/24/21
    1616100001
    [9] Scaphirhynchus platorhynchus
    Last Modified in 02/24/21
    0626200001
    [10] Pseudoscaphirhynchus kauffmani
    Last Modified in 02/24/21
    0626200001
    [11] Pseudoscaphirhynchus hermanni
    Last Modified in 02/24/21
    0626200001
    [12] Acipenser brevirostrum
    Last Modified in 02/24/21
    0626200001
    [13] Acipenser stellatus
    Last Modified in 02/24/21
    0626200001
    [14] † Acipenser ruthenus
    Last Modified in 02/24/21
    1616100001
    [15] Acipenser fulvescens
    Last Modified in 02/24/21
    0626200001
    [16] Acipenser oxyrinchus
    Last Modified in 02/24/21
    0626200001
    [17] Acipenser transmontanus
    Last Modified in 02/24/21
    0626200001
    [18] Acipenser baerii
    Last Modified in 02/24/21
    0626200001
    [19] † Anchiacipenser acanthaspis
    Last Modified in 02/24/21
    23393900001
    [20] † Engdahlichthys milviaegis
    Last Modified in 02/24/21
    43191900001


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    Documents list76
    Taxon list320
    Bibliography49
    Specimen list115
    Views for media list77




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