Project 2551: P. Jimenez-Huidobro, M. W. Caldwell. 2016. Reassessment and reassignment of the early Maastrichtian mosasaur Hainosaurus bernardi Dollo, 1885, to Tylosaurus Marsh, 1872. Journal of Vertebrate Paleontology. 36 (3):e1096275.
Specimen: † Plioplatecarpus (unvouchered)
View: skull

Abstract

Redescription of Hainosaurus bernardi Dollo, 1885a, from the early Maastrichtian of the Ciply Phosphatic Chalk of Belgium, results in a reassignment of the taxon to the genus Tylosaurus Marsh, 1872, because the genus Hainosaurus cannot be diagnosed independent of Tylosaurus. The diagnosis of Hainosaurus bernardi by Dollo, 1885a, is reviewed, and the two incomplete and poorly preserved specimens assigned to the taxon are compared with recognized species of Tylosaurus. Hainosaurus was originally diagnosed from characters of the jugal, quadrate, maxilla, premaxilla, frontal, parietal, and teeth. Here, we show that most of the characters of these elements are shared with the genus Tylosaurus, and that those that are not shared, but that are purported key diagnostic characters for Hainosaurus, are simply not preserved, or are too poorly preserved to support a differential diagnosis of H. bernardi at the generic level. The available data support the conclusion that Hainosaurus is a junior synonym of Tylosaurus because no anatomical features distinguish the former from the latter. The genus Tylosaurus occupied a wider geographic and temporal distribution than has been previously suggested, inhabiting the North Atlantic Circle Basin from the Turonian to the Maastrichtian. There are species-level features that support T. bernardi as distinct from other described species of Tylosaurus.


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Article DOI: 10.1080/02724634.2016.1096275

Project DOI: 10.7934/P2551, http://dx.doi.org/10.7934/P2551
This project containsMatrices
  • 2 Media
  • 1 Matrix
  • 42 Taxa
  • 2 Specimens
  • 131 Characters
Total size of project's media files: 158.2k

Download Project SDD File
Total scored cells: 3545
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 131
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 299
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:131/0
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MorphoBank Project 2551

    Authors' Institutions

    • University of Alberta



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    member name taxa specimens media chars character
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    MorphoBank Curator
    Project Administrator
    4222131003545
    (3502, 0, 43)
    000
    Paulina Jimenez Huidobro
    Full membership
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    Taxonomic Overview for Matrix 'M24325' (42 Taxa)

    taxon unscored
    cells
    scored
    cells
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    [1] Outgroup
    Taxon name last Modified on 11/03/16
    0119119012002
    [2] † Aigialosaurus
    Taxon name last Modified on 06/15/22
    42868603002
    [3] † Komensaurus carrolli
    Taxon name last Modified on 06/15/22
    97343400002
    [4] † Halisaurus platyspondylus
    Taxon name last Modified on 06/15/22
    66656500002
    [5] † Halisaurus sternbergi
    Taxon name last Modified on 06/15/22
    2610410401002
    [6] † Dallasaurus turneri
    Taxon name last Modified on 06/15/22
    87434301002
    [7] † Clidastes liodontus
    Taxon name last Modified on 06/15/22
    1112112000002
    [8] † Clidastes moorevillensis
    Taxon name last Modified on 06/15/22
    1012112100002
    [9] † Clidastes propython
    Taxon name last Modified on 06/15/22
    3010110100002
    [10] † Prognathodon overtoni
    Taxon name last Modified on 06/15/22
    1811211201002
    [11] † Prognathodon rapax
    Taxon name last Modified on 06/15/22
    2710310301002
    [12] † Prognathodon solvayi
    Taxon name last Modified on 06/15/22
    45848402002
    [13] † Prognathodon currii
    Taxon name last Modified on 06/15/22
    96343401002
    [14] † Prognathodon waiparaensis
    Taxon name last Modified on 06/15/22
    98333300002
    [15] † Prognathodon saturator
    Taxon name last Modified on 06/15/22
    58737300002
    [16] † Globidens alabamaensis
    Taxon name last Modified on 06/15/22
    69626200002
    [17] † Globidens dakotensis
    Taxon name last Modified on 06/15/22
    65676600002
    [18] † Mosasaurus conodon
    Taxon name last Modified on 06/15/22
    84474700002
    [19] † Mosasaurus maximus
    Taxon name last Modified on 06/15/22
    1411711700002
    [20] † Mosasaurus missouriensis
    Taxon name last Modified on 06/15/22
    38949300002
    [21] † Plesiotylosaurus crassidens
    Taxon name last Modified on 06/15/22
    37949400002
    [22] † Plotosaurus bennisoni
    Taxon name last Modified on 06/15/22
    2810310300002
    [23] † Tylosaurus nepaeolicus
    Taxon name last Modified on 06/15/22
    2810310300002
    [24] † Tylosaurus bernardi
    Taxon name last Modified on 06/15/22
    2210910900002
    [25] † Tylosaurus kansasensis
    Taxon name last Modified on 06/15/22
    38939300002
    [26] † Taniwhasaurus oweni
    Taxon name last Modified on 06/15/22
    73585800002
    [27] † Taniwhasaurus antarcticus
    Taxon name last Modified on 06/15/22
    71606000002
    [28] † Tylosaurus proriger
    Taxon name last Modified on 06/15/22
    712412400002
    [29] † Yaguarasaurus columbianus
    Taxon name last Modified on 06/15/22
    72585801002
    [30] † Eremiasaurus heterodontus
    Taxon name last Modified on 06/15/22
    47848400002
    [31] † Prognathodon kianda
    Taxon name last Modified on 06/15/22
    72595900002
    [32] † Russellosaurus coheni
    Taxon name last Modified on 06/15/22
    55757501002
    [33] † Romeosaurus fumanensis
    Taxon name last Modified on 06/15/22
    75555501002
    [34] † Ectenosaurus clidastoides
    Taxon name last Modified on 06/15/22
    2310810800002
    [35] † Plioplatecarpus
    Taxon name last Modified on 06/15/22
    2910110002002
    [36] † Platecarpus planifrons
    Taxon name last Modified on 06/15/22
    2510610501002
    [37] † Platecarpus tympaniticus
    Taxon name last Modified on 06/15/22
    512412303002
    [38] † Latoplatecarpus willistoni
    Taxon name last Modified on 06/15/22
    40898803002
    [39] † Selmasaurus johnsoni
    Taxon name last Modified on 06/15/22
    46838302002
    [40] † Angolasaurus bocagei
    Taxon name last Modified on 06/15/22
    73575701002
    [41] † Tethysaurus nopcsai
    Taxon name last Modified on 06/15/22
    42868504002
    [42] † Pannoniasaurus osii
    Taxon name last Modified on 06/15/22
    76535302002


    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project5
    Media downloads3M844918 (2 downloads); M844917 (1 download);
    Project downloads1
    Matrix downloads1Character matrix (1 download);