Project 628: V. Fischer,E. Masure,M. S. Arkhangelsky,P. Godefroit. 2011. A New Barremian (Early Cretaceous) Ichthyosaur from Western Russia. Journal of Vertebrate Paleontology. 31 (5):1010-1025.
Specimen: Sveltonectes (IRSNB/R269)

Abstract

A new ophthalmosaurid ichthyosaur, Sveltonectes insolitus, gen. et sp. nov., is described from a sub-complete and three-dimensionally preserved specimen from the late Barremian of western Russia. This new taxon is supported by 11 cranial, dental, and postcranial autapomorphies, and is also characterized by features previously considered as autapomorphic for some other Ophthalmosauridae, such as a processus narialis on the prefrontal and relatively long hind fins with pre- and postaxial accessory digits. We conducted a new phylogenetic analysis of Thunnosauria, which supports a ‘Stenopterygius’ origin for Ophthalmosauridae. Sveltonectes is regarded as the sister taxon of Aegirosaurus, which shares a similar skull roof construction. Contrary to most other Cretaceous ichthyosaurs, Sveltonectes is characterized by delicate and sharply pointed teeth, confirming that the ophthalmosaurids were ecologically highly diversified during the Early Cretaceous.


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Project DOI: 10.7934/P628, http://dx.doi.org/10.7934/P628
This project containsMatrices
  • 2 Media
  • 1 Matrix
  • 1 Document
  • 15 Taxa
  • 1 Specimen
  • 50 Characters
Total size of project's media files: 2 MB

Download Project SDD File
Total scored cells: 528
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 50
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 104
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:50/0
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MorphoBank Project 628


    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    Last logged in 05/16/12
    15005000528
    (528, 0, 0)
    000
    Maureen Admin
    Full membership
    Last logged in 11/21/11
    0000000
    (0, 0, 0)
    000
    Valentin Fischer
    Full membership
    Last logged in 11/18/11
    0120000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M1436' (15 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
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    member
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    [1] Temnodontosaurus
    Last Modified in 12/05/13
    0505000003
    [2] Ichthyosaurus
    Last Modified in 12/05/13
    0545000003
    [3] Stenopterygius
    Last Modified in 12/05/13
    2524800003
    [4] † Ophthalmosaurus icenicus
    Last Modified in 12/05/13
    0505000003
    [5] Chacaicosaurus
    Last Modified in 12/05/13
    35151500003
    [6] Brachypterygius
    Last Modified in 12/05/13
    21292900003
    [7] Arthropterygius
    Last Modified in 12/05/13
    32181800003
    [8] Mollesaurus
    Last Modified in 12/05/13
    39111100003
    [9] Caypullisaurus
    Last Modified in 12/05/13
    16353400003
    [10] Aegirosaurus
    Last Modified in 12/05/13
    16353400003
    [11] † Platypterygius australis
    Last Modified in 12/05/13
    0505000003
    [12] † Platypterygius hercynicus
    Last Modified in 12/05/13
    11403900003
    [13] Maiaspondylus
    Last Modified in 12/05/13
    26242400003
    [14] Athabascasaurus
    Last Modified in 12/05/13
    28222200003
    [15] Sveltonectes
    Last Modified in 12/05/13
    7434300003


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    Specimen list1605
    Taxon list5601
    Documents list1082




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