Project 3684: F. F. Garberoglio, S. Apesteguía, T. R. Simões, A. Palci, R. O. Gómez, R. L. Nydam, H. C. Larsson, M. S. Lee, M. W. Caldwell. 2019. New skulls and skeletons of the Cretaceous legged snake Najash, and the evolution of the modern snake body plan. Science Advances. 5 (11):eaax5833.
Specimen: Cylindrophis (unvouchered)
View: whole organism

Abstract

Snakes represent one of the most dramatic examples of the evolutionary versatility of the vertebrate body plan, including body elongation, limb loss, and skull kinesis. However, understanding the earliest steps toward the acquisition of these remarkable adaptations is hampered by the very limited fossil record of early snakes. Here, we shed light on the acquisition of the snake body plan using micro–computed tomography scans of the first three-dimensionally preserved skulls of the legged snake Najash and a new phylogenetic hypothesis. These findings elucidate the initial sequence of bone loss that gave origin to the modern snake skull. Morphological and molecular analyses including the new cranial data provide robust support for an extensive basal radiation of early snakes with hindlimbs and pelves, demonstrating that this intermediate morphology was not merely a transient phase between limbed and limbless body plans.


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Article DOI: 10.1126/sciadv.aax5833

Project DOI: 10.7934/P3684, http://dx.doi.org/10.7934/P3684
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 2 Documents
  • 36 Taxa
  • 1 Specimen
  • 248 Characters
Total size of project's media files: 472.12k

Download Project SDD File
Total scored cells: 6028
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 248
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 552
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:248/0
Currently Viewing:
MorphoBank Project 3684

    Authors' Institutions

    • Flinders University

    • McGill University

    • University of Alberta

    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)

    • Fundacion de Historia Natural Felix de Azara

    • Universidad de Buenos Aires

    • South Australian Museum

    • Midwestern University

    • Universidad Maimonides



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    Last logged in 03/31/20
    3611248006028
    (5900, 0, 128)
    000
    MorphoBank Curator
    Full membership
    Last logged in 07/27/20
    0000000
    (0, 0, 0)
    000
    Fernando Garberoglio
    Full membership
    Last logged in Never
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M26551' (36 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Varanus
    Last Modified in 03/31/20
    2236236010003
    [2] † Najash
    Last Modified in 03/31/20
    3221921402003
    [3] Leptotyphlops
    Last Modified in 03/31/20
    10229221017003
    [4] Anomalepipidae
    Last Modified in 03/31/20
    8236230010003
    [5] Typhlops
    Last Modified in 03/31/20
    7229221020003
    [6] † Dinilysia
    Last Modified in 03/31/20
    3121721502003
    [7] † Sanajeh
    Last Modified in 03/31/20
    183656500003
    [8] † Wonambi
    Last Modified in 03/31/20
    8416316301003
    [9] † Yurlunggur
    Last Modified in 03/31/20
    6518418300003
    [10] Anilius
    Last Modified in 03/31/20
    623723705003
    [11] Cylindrophis
    Last Modified in 03/31/20
    324224203003
    [12] Uropeltidae
    Last Modified in 03/31/20
    3260235010003
    [13] Anomochilus
    Last Modified in 03/31/20
    4020220107003
    [14] † Pachyrhachis
    Last Modified in 03/31/20
    12711911902003
    [15] † Haasiophis
    Last Modified in 03/31/20
    11013813701003
    [16] † Eupodophis
    Last Modified in 03/31/20
    151979700003
    [17] Xenopeltis
    Last Modified in 03/31/20
    2236236010003
    [18] Loxocemus
    Last Modified in 03/31/20
    324624500003
    [19] Erycinae
    Last Modified in 03/31/20
    426524400003
    [20] Ungaliophiidae
    Last Modified in 03/31/20
    724524001003
    [21] Boinae
    Last Modified in 03/31/20
    125624601003
    [22] Pythoninae
    Last Modified in 03/31/20
    225324600003
    [23] Tropidophiidae
    Last Modified in 03/31/20
    424424301003
    [24] Bolyeriidae
    Last Modified in 03/31/20
    523923607003
    [25] Acrochordidae
    Last Modified in 03/31/20
    1123223007003
    [26] Basal colubroides
    Last Modified in 03/31/20
    725323308003
    [27] † Coniophis
    Last Modified in 03/31/20
    209403900003
    [28] † Parviraptor estesi
    Last Modified in 03/31/20
    232151501003
    [29] † Portugalophis lignites
    Last Modified in 03/31/20
    221262601003
    [30] † Diablophis gilmorei
    Last Modified in 03/31/20
    205424201003
    [31] † Eophis woodwardi
    Last Modified in 03/31/20
    237111100003
    [32] † Aff.Parviraptorestesi
    Last Modified in 03/31/20
    226222200003
    [33] † Menarana nosymena
    Last Modified in 03/31/20
    213353500003
    [34] † Madtsoia camposi
    Last Modified in 03/31/20
    198505000003
    [35] † Nanowana
    Last Modified in 03/31/20
    156959200003
    [36] † Xiaophis
    Last Modified in 03/31/20
    226222200003


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views984
    Project overview156
    Matrix views93Matrix landing page (77 views); TNT Matrix from Garberoglio et al. 2019 (prepared by MorphoBank curators from original submission) (16 views);
    Taxon list376
    Documents list63
    Media views175Media search (153 views); M687210 (22 views);
    Specimen list82
    Bibliography32
    Views for media list7




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project19
    Project downloads13
    Matrix downloads4TNT Matrix from Garberoglio et al. 2019 (prepared by MorphoBank curators from original submission) (4 downloads);
    Document downloads2Character list from the Supplemental Material of Garberoglio et al 2018 (2 downloads);