Project 495: H. Bourget, J. S. Anderson. 2011. A New Amphibamid (Temnospondyli: Dissorophoidea) from the Early Permian of Texas. Journal of Vertebrate Paleontology. 31 (1):32-49.
Specimen: † Rubeostratilia texensis (FMNH/PR:1460)
View: Dorsal

Abstract

The Amphibamidae are undergoing intensive investigation at present, with many new species recently described to better understand their interrelationships and role in the origin of extant amphibians. A new genus and species of amphibamid, Rubeostratilia texensis, represented by a skull from the Early Permian of Texas, shows many similarities with a recent described species from Richards Spur, Oklahoma, Pasawioops mayi. The skull is elongate and oval, with enlarged external naris and orbits, typical of the other amphibamids within the Micropholis-Tersomius cluster. The skull exhibits the laterally exposed palatine (LEP) and the dorsal quadrate process typical of the Dissorophoidea. Unlike Pasawioops, the new species preserves only a few additional characters relevant to amphibamid relationships: the pterygoid contacts only the ectopterygoid, the postfrontal's shape is falciform, and the alary processes do not extend further posteriorly than one-half of the length of the external naris. We included Rubeostratilia in a recently published amphibamid matrix, to which we added four characters, and conducted two separate phylogenetic analyses, differing in the coding of three characters in the genus Plemmyradytes. The results demonstrate the importance of precision in coding for each character, because these minor changes lead to two different topologies. A brief morphometric analysis of amphibamid cranial anatomy was conducted to better understand the nature of the different morphotypes among which the new species clusters. The results of both morphometric and phylogenetic analysis add support to the emerging consensus that amphibamids cluster into two distinct clades.


Read the article »

Project DOI: 10.7934/P495, http://dx.doi.org/10.7934/P495
This project containsMatrices
  • 3 Media
  • 1 Matrix
  • 1 Document
  • 19 Taxa
  • 1 Specimen
  • 66 Characters
Total size of project's media files: 35 MB

Download Project SDD File
Total scored cells: 1112
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 66
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:66/0
Currently Viewing:
MorphoBank Project 495


    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    Last logged in 05/08/12
    191366001112
    (1112, 0, 0)
    000
    Maureen Admin
    Full membership
    Last logged in 07/27/11
    0000000
    (0, 0, 0)
    000
    Jason Anderson
    Full membership
    Last logged in Never
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M1102' (19 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Dendrerpeton
    Last Modified in 12/05/13
    2646400003
    [2] Sclerocephalus
    Last Modified in 12/05/13
    1666500003
    [3] Eryopidae
    Last Modified in 12/05/13
    1676500003
    [4] Micromelerpeton
    Last Modified in 12/05/13
    3676300003
    [5] Amphibamus
    Last Modified in 12/05/13
    3636300003
    [6] Platyrhinops
    Last Modified in 12/05/13
    4646200003
    [7] Doleserpeton
    Last Modified in 12/05/13
    2646400003
    [8] Eoscopus
    Last Modified in 12/05/13
    2666400003
    [9] Micropholis
    Last Modified in 12/05/13
    1706500003
    [10] Tersomius
    Last Modified in 12/05/13
    15525100003
    [11] Ecolsonia
    Last Modified in 12/05/13
    3636300003
    [12] Trematopidae
    Last Modified in 12/05/13
    2656400003
    [13] Dissorophinae
    Last Modified in 12/05/13
    2666400003
    [14] Cacopinae
    Last Modified in 12/05/13
    3636300003
    [15] Pasawioops
    Last Modified in 12/05/13
    18484800003
    [16] Plemmyradytes
    Last Modified in 12/05/13
    30363600003
    [17] Georgenthalia
    Last Modified in 12/05/13
    27403900003
    [18] Gerobratachus
    Last Modified in 12/05/13
    22444400003
    [19] † Rubeostratilia texensis
    Last Modified in 12/05/13
    22444400003


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views22155
    Project overview2263
    Media views4768Media search (2984 views); M68247 (457 views); M68248 (624 views); M68249 (703 views);
    Matrix views1430Matrix landing page (1229 views); Temnospondyli: Dissorophoidea (201 views);
    Specimen list1897
    Taxon list8236
    Bibliography765
    Views for media list1769
    Documents list1027




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project254
    Media downloads1M68248 (1 download);
    Matrix downloads6Temnospondyli: Dissorophoidea (6 downloads);
    Project downloads247