Project 4182: M. R. Carvalho, P. Wilf, E. J. Hermsen, M. A. Gandolfo, N. R. Cúneo, K. R. Johnson. 2013. First record of Todea (Osmundaceae) in South America, from the early Eocene paleorainforests of Laguna del Hunco (Patagonia, Argentina). American Journal of Botany. 100 (9):1831-1848.
Specimen: Todea barbara T. Moore (unvouchered)
View: NA

Abstract

• Premise of the Study: The early Eocene Laguna del Hunco caldera-lake paleoflora (ca. 52 Ma) from Chubut Province, Argentina, is notably diverse and includes many conifer and angiosperm lineages that are extinct in South America but extant in Australasian rainforests. No ferns have been previously described from Laguna del Hunco. We describe and interpret a new species of fossil Osmundaceae based on fertile and sterile pinnae.

• Methods: The fossil specimens were compared with other extant and fossil Osmundaceae based on living and herbarium material and published descriptions. A morphological matrix based on 29 characters was constructed for 17 living species in Osmundaceae, four species assigned to the fossil genus Todites, and the new fossil species. Phylogenetic analyses were conducted under parsimony using morphology and total evidence matrices.

• Key Results: Both the new fossil and the Todites species were consistently resolved within the leptopteroid clade of Osmundaceae, and the new species resolved in a clade with the two living Todea species, which are now restricted to Australia, New Guinea, New Zealand, and southern Africa.

• Conclusions: Todea amissa sp. nov. is the first record of Todea, living or fossil, in South America and only the second fossil record worldwide. The distribution of extant Todea on Gondwanan continents other than South America is broadly shared with other taxa from Laguna del Hunco, further indicating that a large component of this flora represents a Gondwanic biome that is no longer found on the South American continent.



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Article DOI: 10.3732/ajb.1200637

Project DOI: 10.7934/P4182, http://dx.doi.org/10.7934/P4182
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 22 Taxa
  • 1 Specimen
  • 29 Characters
Total size of project's media files: 835.82k

Download Project SDD File
Total scored cells: 582
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 29
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 70
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:29/0
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MorphoBank Project 4182

    This research
    supported by

    Authors' Institutions

    • Museo Paleontológico Egidio Feruglio

    • National Museum of Natural History, Smithsonian Institution

    • Cornell University

    • Ohio University

    • Pennsylvania State University

    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)

    • Smithsonian Institution



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    comms
        
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    22112900582
    (543, 0, 39)
    0000
    Mónica R. Carvalho
    Full membership
    0000000
    (0, 0, 0)
    0000


    Taxonomic Overview for Matrix 'M28691' (22 Taxa)

    taxon unscored
    cells
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    NPA
    cells
    "-" cellscell images labels on
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    member
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    [1] Dipteris conjugata
    Last Modified in 01/30/22
    0252504002
    [2] Diplopterygium bancroftii
    Last Modified in 01/30/22
    0272702002
    [3] Gleichenella pectinata
    Last Modified in 01/30/22
    0272702002
    [4] Matonia pectinata
    Last Modified in 01/30/22
    6212102002
    [5] Leptopteris hymenophylloides
    Last Modified in 01/30/22
    1272601002
    [6] Leptopteris wilkesiana
    Last Modified in 01/30/22
    0282801002
    [7] Leptopteris fraseri
    Last Modified in 01/30/22
    0282801002
    [8] Osmundastrum cinnamomeum
    Last Modified in 01/30/22
    0262603002
    [9] Osmunda vachellii
    Last Modified in 01/30/22
    1262602002
    [10] Osmunda regalis
    Last Modified in 01/30/22
    1262602002
    [11] Osmunda lancea
    Last Modified in 01/30/22
    1252503002
    [12] Osmunda javanica
    Last Modified in 01/30/22
    0272702002
    [13] Osmunda japonica
    Last Modified in 01/30/22
    1252503002
    [14] Osmunda claytoniana
    Last Modified in 01/30/22
    0272702002
    [15] Osmunda banksiifolia
    Last Modified in 01/30/22
    1262602002
    [16] Todea barbara
    Last Modified in 01/30/22
    0282801002
    [17] Todea papuana
    Last Modified in 01/30/22
    0282801002
    [18] † Todea amissa
    Last Modified in 01/30/22
    9191901002
    [19] † Todites cacereii
    Last Modified in 01/30/22
    6232201002
    [20] † Todites lobatus
    Last Modified in 01/30/22
    10181801002
    [21] † Todites princeps
    Last Modified in 01/30/22
    11171701002
    [22] † Todites denticulatus
    Last Modified in 01/30/22
    10191801002


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views3627
    Project overview336
    Documents list217
    Matrix views252Matrix landing page (228 views); Matrix by Carvalho et al 2013 (24 views);
    Media views932Media search (788 views); M838517 (144 views);
    Taxon list924
    Bibliography170
    Views for media list293
    Specimen list503




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project2
    Project downloads1
    Matrix downloads1Matrix by Carvalho et al 2013 (1 download);