Project 5576: F. Alvarez, R. Jia-Yu, A. J. Boucot. 1998. The classification of athyridid brachiopods. Journal of Paleontology. 72 (5):827-855.
Specimen: † Athyris fultonensis (unvouchered)
View: whole specimen

Abstract

Phylogenetic relationships among higher taxa of articulate brachiopods that developed a spiralium as mineralized support for the lophophore, and the resulting classifications, are not universally agreed upon due to the complex pattern of character evolution within the phylum. Our results, using phylogenetic methodology in conjunction with traditional methods, showed a more complete and easily testable picture of this evolution than either method used alone. A detailed working hypothesis of athyridide phylogeny and the supporting evidence on character distribution is given, and a new classification of the impunctate and punctate athyrids sensu lato is presented with diagnoses to subfamily. Agreement between the stratigraphical first appearance of athyridid subfamilies and their cladistic rank was quite good (except for the koninckinoids), suggesting that both outgroup and traditional paleontological methods indicate a similar direction of character polarity in the evolution of the group. The classification is proposed based on a mix of external and internal characters which persisted during unbroken lineages. New taxa are the families Parazygidae and Triathyrididae; the subfamilies Whitfieldellinae, Triathyridinae, Septathyridinae, Cleiothyridininae, Ochotathyridinae and Plectospirinae, and the genera Brimethyris, Carteridina, Tetraloba and Cooperispira. We studied the great morphological diversity among the athyridids. Their complete strati-graphical ranges help in building phyletic lineages.


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Article DOI: 10.1017/S0022336000027189

Project DOI: 10.7934/P5576, http://dx.doi.org/10.7934/P5576
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 38 Taxa
  • 2 Specimens
  • 37 Characters
Total size of project's media files: 248.07k

Download Project SDD File
Total scored cells: 1317
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 37
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 130
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:37/0
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MorphoBank Project 5576
  • Creation Date:
    22 October 2024
  • Publication Date:
    28 December 2024

    Authors' Institutions

    • Oregon State University

    • Universidad de Oviedo

    • Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences



    Members

    member name taxa specimens media chars character
    media
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    (scored, NPA, "-")
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    Cidambi Gopal
    Project Administrator
    371037001317
    (1317, 0, 0)
    000
    Brooke Long-Fox
    Full membership
    1110000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M30279' (37 Taxa)

    taxon unscored
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    scored
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    [1] † Athyridinae
    Taxon name last Modified on 10/26/24
    0373700002
    [2] † Athyrisininae
    Taxon name last Modified on 10/26/24
    2353500002
    [3] † Camarophorellinae
    Taxon name last Modified on 10/26/24
    2353500002
    [4] † Clavigerinae
    Taxon name last Modified on 10/26/24
    1363600002
    [5] † Cleiothyridininae
    Taxon name last Modified on 10/26/24
    0373700002
    [6] † Comelicaniinae
    Taxon name last Modified on 10/26/24
    4333300002
    [7] † Didymothyridinae
    Taxon name last Modified on 10/26/24
    4333300002
    [8] † Diplospirellinae
    Taxon name last Modified on 10/26/24
    0373700002
    [9] † Helenathyridinae
    Taxon name last Modified on 10/26/24
    3343400002
    [10] † Hungarispirinae
    Taxon name last Modified on 10/26/24
    0373700002
    [11] † Hustediinae
    Taxon name last Modified on 10/26/24
    0373700002
    [12] † Hyattidinidae
    Taxon name last Modified on 10/26/24
    4333300002
    [13] † Koninckinoidea
    Taxon name last Modified on 10/26/24
    4333300002
    [14] † Lochengiinae
    Taxon name last Modified on 10/26/24
    0373700002
    [15] † Meristellinae
    Taxon name last Modified on 10/26/24
    0373700002
    [16] † Meristinae
    Taxon name last Modified on 10/26/24
    1363600002
    [17] † Misoliinae
    Taxon name last Modified on 10/26/24
    3343400002
    [18] † Mongolospiroidea
    Taxon name last Modified on 10/26/24
    3343400002
    [19] † Neoretziinae
    Taxon name last Modified on 10/26/24
    2353500002
    [20] † Nucleospiroidea
    Taxon name last Modified on 10/26/24
    0373700002
    [21] † Ochotathyridinae
    Taxon name last Modified on 10/26/24
    0373700002
    [22] † Parazygidae
    Taxon name last Modified on 10/26/24
    0373700002
    [23] † Plectospirinae
    Taxon name last Modified on 10/26/24
    1363600002
    [24] † Plicathyridinae
    Taxon name last Modified on 10/26/24
    0373700002
    [25] † Pradoiinae
    Taxon name last Modified on 10/26/24
    1363600002
    [26] † Retzielloidea
    Taxon name last Modified on 10/26/24
    1363600002
    [27] † Retziidae
    Taxon name last Modified on 10/26/24
    0373700002
    [28] † Rhynchospirinidae
    Taxon name last Modified on 10/26/24
    2353500002
    [29] † Rowleyellinae
    Taxon name last Modified on 10/26/24
    9282800002
    [30] † Septathyridinae
    Taxon name last Modified on 10/26/24
    0373700002
    [31] † Spirigerellinae
    Taxon name last Modified on 10/26/24
    0373700002
    [32] † Tetractinellinae
    Taxon name last Modified on 10/26/24
    0373700002
    [33] † Triathyridinae
    Taxon name last Modified on 10/26/24
    0373700002
    [34] † Whitfieldellinae
    Taxon name last Modified on 10/26/24
    0373700002
    [35] † Xenosariinae
    Taxon name last Modified on 10/26/24
    5323200002
    [36] † Ancistrorhynchidae
    Taxon name last Modified on 10/26/24
    0373700002
    [37] † Trigonirhynchiidae
    Taxon name last Modified on 10/26/24
    0373700002