Project 723: P. P. Skutschas, Y. M. Gubin. 2012. A New Salamander from the Late Paleocene - Early Eocene of Ukraine. Acta Palaeontologica Polonica. 57 (1):135-148.
Specimen: Seminobatrachus boltyschkensis (PIN 3991/9a)
View: part in dorsal aspect

Abstract

A new neotenic salamander, Seminobatrachus boltyschkensis gen. et sp. nov., is described based on 14 skeletons of late Paleocene - early Eocene age preserved on drill core slabs from the Cherkassy Region, central Ukraine. The new taxon is diagnosed by the following unique combination of characters: dorsal process of premaxilla posteriorly elongate and overlaps frontal; maxilla greatly reduced in size; parietal - squamosal contact absent; vomerine tooth row long and parallel to maxillary arcade; pterygoid has long anterior process; quadrate ossified; marginal and palatal teeth pedicellate; trunk vertebrae amphicoelous, each having a subcentral keel, anterior basapophysis, and spinal nerve foramina; ribs bicipital; carpals and tarsals unossified; and phalangeal formulae of 2-2-3-2 and 2-2-3-4-2 for manus and pes, respectively. Phylogenetic analysis nests S. boltyschkensis within Urodela (i.e., crown-clade salamanders), but its exact phylogenetic position is equivocal, resolving in one of three ways: (1) in an unresolved trichotomy with Salamandra and (Ambystomatidae + (Dicamptodon + Rhyacotriton)) (results obtained in NONA v. 2.0, with the WINCLADA v. 1.00.08 interface; the parsimony ratchet (island hopper) algorithm), (2) as a sister taxon of (Salamandra + (Ambystomatidae + (Dicamptodon + Rhyacotriton))) clade (results obtained in TNT v. 1.1; the implicit enumeration search algorithm) or (3) as a sister taxon of Ambystomatidae (results obtained in PAUP v. 4.0b10; the branch-and-bound search algorithm).


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Project DOI: 10.7934/P723, http://dx.doi.org/10.7934/P723
This project containsMatrices
  • 2 Media
  • 1 Matrix
  • 1 Document
  • 26 Taxa
  • 2 Specimens
  • 72 Characters
Total size of project's media files: 5.41M

Download Project SDD File
Total scored cells: 1044
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 72
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 177
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:72/0
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MorphoBank Project 723

    Authors' Institutions

    • Saint Petersburg State University

    • Russian Academy of Sciences



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    262272001044
    (1042, 0, 2)
    000
    Maureen Admin
    Full membership
    0000000
    (0, 0, 0)
    000
    Pavel Skutschas
    Full membership
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M1642' (22 Taxa)

    taxon unscored
    cells
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    NPA
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    "-" cellscell images labels on
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    [1] Marmorerpeton
    Last Modified in 12/05/13
    55181700003
    [2] Karaurus
    Last Modified in 12/05/13
    35373700003
    [3] Liaoxitriton
    Last Modified in 12/05/13
    42323000003
    [4] Jeholotriton
    Last Modified in 12/05/13
    41313100003
    [5] Chunerpeton
    Last Modified in 12/05/13
    40323200003
    [6] Valdotriton
    Last Modified in 12/05/13
    35383700003
    [7] Iridotriton
    Last Modified in 12/05/13
    42313000003
    [8] Pangerpeton
    Last Modified in 12/05/13
    48252400003
    [9] Sirenidae
    Last Modified in 12/05/13
    9636201003
    [10] Hynobiidae
    Last Modified in 12/05/13
    10676200003
    [11] Cryptobranchidae
    Last Modified in 12/05/13
    8656400003
    [12] Ambystomatidae
    Last Modified in 12/05/13
    8706400003
    [13] Salamandra
    Last Modified in 12/05/13
    0747200003
    [14] Dicamptodon
    Last Modified in 12/05/13
    8646400003
    [15] Plethodontidae
    Last Modified in 12/05/13
    9786300003
    [16] Rhyacotriton
    Last Modified in 12/05/13
    12606000003
    [17] Amphiumidae
    Last Modified in 12/05/13
    8646400003
    [18] Proteidae
    Last Modified in 12/05/13
    8666301003
    [19] Regalerpeton
    Last Modified in 12/05/13
    47252500003
    [20] Seminobatrachus
    Last Modified in 12/05/13
    41323100003
    [21] Batrachosauroididae
    Last Modified in 12/05/13
    37393500003
    [22] Kokartus
    Last Modified in 12/05/13
    41313100003


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