Project 4851: M. Friedman. 2007. The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959. Zoological Journal of the Linnean Society. 151 (1):115-171.
Specimen: † Eusthenopteron foordi (unvouchered)
View: whole specimen

Abstract

New data are presented on the neurocranial complex (endocranium plus intimately associated bones of the palate) of the Late Devonian (Famennian) ‘rhynchodipterid’ lungfish Soederberghia groenlandica from the Aina Dal Formation (Celsius Bjerg Group) of East Greenland. Only the otic and occipital regions of the braincase are ossified in Soederberghia. The neurocranium of this genus shares a series of derived features with ‘Griphognathus’ whitei, including a cranial centrum, fenestrate lateral cristae, and gutters on the ventral surface of the parasphenoid interpreted as accommodating the lateral dorsal aortae. The interrelationships of early lungfishes have been the subject of considerable disagreement. New data from Soederberghia are coupled with a data set focused on the character-rich neurocranial complex in order to examine the systematic utility of this underexploited morphological system. Different methods of phylogenetic inference (maximum parsimony, Bayesian) return broadly consistent results. The Early to Middle Devonian forms Dipnorhynchus, Stomiahykus and Uranolophus are placed among the most basal of lungfishes. ‘Holodontids’ plus ‘rhynchodipterids’ (comprising Griphognathus and Soederberghia) occupy an apical position, and are separated from the earliest lungfishes by a paraphyletic assemblage of taxa generally identified as ‘chirodipterids’ and ‘dipterids.’ This finds broad agreement with the results of previous cladistic studies focused on non-neurocranial data sets, but diverges from functional-adaptive scenarios that posit three lineages of early lungfishes based on aspects of the dentition. As currently defined, both ‘chirodipterids’ and the genus Chirodipterus are heterogeneous assemblages; this analysis fails to find support for the monophyly of either. While this study indicates that Griphognathus is probably paraphyletic, it nevertheless supports a close relationship between the nominal species of this genus and Soederberghia.


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Article DOI: 10.1111/j.1096-3642.2007.00320.x

Project DOI: 10.7934/P4851, http://dx.doi.org/10.7934/P4851
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 26 Taxa
  • 2 Specimens
  • 70 Characters
Total size of project's media files: 81.88k

Download Project SDD File
Total scored cells: 1462
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 70
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 141
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:70/0
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MorphoBank Project 4851
  • Creation Date:
    22 August 2023
  • Publication Date:
    23 August 2023
  • Matrix downloads: 10

    This research
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    Authors' Institutions

    • University of Cambridge



    Members

    member name taxa specimens media chars character
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    (scored, NPA, "-")
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    Joyce Song
    Project Administrator
    261070001462
    (1237, 0, 225)
    000


    Taxonomic Overview for Matrix 'M29461' (26 Taxa)

    taxon unscored
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    scored
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    [1] † Psarolepis romeri
    Taxon name last Modified on 08/22/23
    203636014001
    [2] † Chirodipterus australis
    Taxon name last Modified on 08/22/23
    0656406001
    [3] † Chirodipterus liangchengi
    Taxon name last Modified on 08/22/23
    15494906001
    [4] † Chirodipterus wildungensis
    Taxon name last Modified on 08/22/23
    4606006001
    [5] † Diabolepis speratus
    Taxon name last Modified on 08/22/23
    233434013001
    [6] † Diplocercides kayseri
    Taxon name last Modified on 08/22/23
    45353013001
    [7] † Dipnorhynchus kurikae
    Taxon name last Modified on 08/22/23
    18444408001
    [8] † Dipnorhynchus sussmilchi
    Taxon name last Modified on 08/22/23
    7555508001
    [9] † Dipterus valenciennesi
    Taxon name last Modified on 08/22/23
    8575606001
    [10] † Eusthenopteron foordi
    Taxon name last Modified on 08/23/23
    15555014001
    [11] † Glyptolepis spp.
    Taxon name last Modified on 08/22/23
    213737012001
    [12] † Gogodipterus paddyensis
    Taxon name last Modified on 08/22/23
    15505005001
    [13] † Gogonasus andrewsae
    Taxon name last Modified on 08/22/23
    55251014001
    [14] † Griphognathus minutidens
    Taxon name last Modified on 08/22/23
    37292904001
    [15] † Griphognathus whitei
    Taxon name last Modified on 08/22/23
    2646107001
    [16] † Holodipterus gogoensis
    Taxon name last Modified on 08/22/23
    4606006001
    [17] † Melanognathus canadensis
    Taxon name last Modified on 08/22/23
    24404006001
    [18] † Orlovichthys limnatis
    Taxon name last Modified on 08/22/23
    24404006001
    [19] † Pillararhynchus longi
    Taxon name last Modified on 08/22/23
    5585807001
    [20] † Porolepis spp.
    Taxon name last Modified on 08/22/23
    144343013001
    [21] † Powichthys thorsteinssoni
    Taxon name last Modified on 08/22/23
    104646014001
    [22] † Soederberghia groenlandica
    Taxon name last Modified on 08/22/23
    28373705001
    [23] † Sorbitorhynchus deleaskitus
    Taxon name last Modified on 08/22/23
    30343406001
    [24] † Stomiahykus thlaodus
    Taxon name last Modified on 08/22/23
    16484806001
    [25] † Uranolophus wyomingensis
    Taxon name last Modified on 08/22/23
    27383706001
    [26] † Youngolepis praecursor
    Taxon name last Modified on 08/22/23
    45352014001


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    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project11
    Matrix downloads10Matrix from PBDB (10 downloads);
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