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: 6 MB

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


    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    Last logged in 05/01/12
    262272001044
    (1042, 0, 2)
    000
    Maureen Admin
    Full membership
    Last logged in 05/01/12
    0000000
    (0, 0, 0)
    000
    Pavel Skutschas
    Full membership
    Last logged in 04/25/12
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M1642' (22 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] 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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