Project 3581: G. Rossetto‐Harris, P. Wilf, I. H. Escapa, A. Andruchow‐Colombo. 2020. Eocene Araucaria Sect. Eutacta from Patagonia and floristic turnover during the initial isolation of South America. American Journal of Botany. 107 (5):null.
Specimen: † Araucaria huncoensis (/MPEF-Pb-)
View: 2D

Abstract

PREMISE: Eocene floras of Patagonia document biotic response to the final separation of Gondwana. The conifer genus Araucaria, distributed worldwide during the Mesozoic, has a disjunct extant distribution between South America and Australasia. Fossils assigned to Australasian Araucaria Sect. Eutacta usually are represented by isolated organs, making diagnosis difficult. Araucaria pichileufensis E.W. Berry, from the middle Eocene Río Pichileufú (RP) site in Argentine Patagonia, was originally placed in Sect. Eutacta and later reported from the early Eocene Laguna del Hunco (LH) locality. However, the relationship of A. pichileufensis to Sect. Eutacta and the conspecificity of the Araucaria material among these Patagonian floras have not been tested using modern methods.
METHODS: We review the type material of A. pichileufensis alongside large (n = 192) new fossil collections of Araucaria from LH and RP, including multi-organ preservation of leafy branches, ovuliferous complexes, and pollen cones. We use a total evidence phylogenetic analysis to analyze relationships of the fossils to Sect. Eutacta.
RESULTS: We describe Araucaria huncoensis sp. nov. from LH and improve the whole-plant concept for Araucaria pichileufensis from RP. The two species respectively resolve in the crown and stem of Sect. Eutacta.
CONCLUSIONS: Our results confirm the presence and indicate the survival of Sect. Eutacta in South America during early Antarctic separation. The exceptionally complete fossils significantly predate several molecular age estimates for crown Eutacta. The differentiation of two Araucaria species demonstrates conifer turnover during climate change and initial South American isolation from the early to middle Eocene.


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Article DOI: 10.1002/ajb2.1467

Project DOI: 10.7934/P3581, http://dx.doi.org/10.7934/P3581
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 57 Taxa
  • 1 Specimen
  • 63 Characters
Total size of project's media files: 21.85M

Download Project SDD File
Total scored cells: 3047
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 63
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 134
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:63/0
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MorphoBank Project 3581

    This research
    supported by

    Authors' Institutions

    • Museo Paleontológico Egidio Feruglio

    • Pennsylvania State University

    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)



    Members

    member name taxa specimens media chars character
    media
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    (scored, NPA, "-")
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    Gabriella Rossetto-Harris
    Project Administrator
    Last logged in 05/10/20
    2110000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M26625' (56 Taxa)

    taxon unscored
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    [1] Cunninghamia lanceolata
    Last Modified in 05/18/20
    35049011001
    [2] Taiwania cryptomerioides
    Last Modified in 05/18/20
    8504609001
    [3] Cupressus sempervivens
    Last Modified in 05/18/20
    55348010001
    [4] Cupressus sargentii
    Last Modified in 05/18/20
    55147011001
    [5] Xanthocyparis vietnamensis
    Last Modified in 05/18/20
    45248011001
    [6] Podocarpus latifolius
    Last Modified in 05/18/20
    74443013001
    [7] Podocarpus macrophyllus
    Last Modified in 05/18/20
    64443014001
    [8] Dacrycarpus dacrydioides
    Last Modified in 05/18/20
    94241013001
    [9] Pinus sylvestris
    Last Modified in 05/18/20
    550008001
    [10] Abies alba
    Last Modified in 05/18/20
    104141012001
    [11] Sciadopitys verticillata
    Last Modified in 05/18/20
    84542013001
    [12] Araucaria araucana
    Last Modified in 05/18/20
    04948015001
    [13] Araucaria angustifolia
    Last Modified in 05/18/20
    04948015001
    [14] Araucaria bidwillii
    Last Modified in 05/18/20
    05049014001
    [15] Araucaria hunsteinii
    Last Modified in 05/18/20
    05049014001
    [16] Araucaria bernieri
    Last Modified in 05/18/20
    05049014001
    [17] Araucaria biramulata
    Last Modified in 05/18/20
    05049014001
    [18] Araucaria columnaris
    Last Modified in 05/18/20
    05049014001
    [19] Araucaria cunninghamii
    Last Modified in 05/18/20
    05049014001
    [20] Araucaria heterophylla
    Last Modified in 05/18/20
    05049014001
    [21] Araucaria humboldtensis
    Last Modified in 05/18/20
    05049014001
    [22] Araucaria laubenfelsii
    Last Modified in 05/18/20
    05049014001
    [23] Araucaria luxurians
    Last Modified in 05/18/20
    05149014001
    [24] Araucaria montana
    Last Modified in 05/18/20
    05049014001
    [25] Araucaria muelleri
    Last Modified in 05/18/20
    05049014001
    [26] Araucaria nemorosa
    Last Modified in 05/18/20
    05049014001
    [27] Araucaria rulei
    Last Modified in 05/18/20
    05049014001
    [28] Araucaria schmidii
    Last Modified in 05/18/20
    44746013001
    [29] Araucaria scopulorum
    Last Modified in 05/18/20
    05049014001
    [30] Araucaria subulata
    Last Modified in 05/18/20
    05049014001
    [31] Agathis robusta
    Last Modified in 05/18/20
    05452011001
    [32] Agathis australis
    Last Modified in 05/18/20
    15652010001
    [33] Agathis dammara
    Last Modified in 05/18/20
    25250011001
    [34] Agathis atropurpurea
    Last Modified in 05/18/20
    05552011001
    [35] Agathis borneensis
    Last Modified in 05/18/20
    05552011001
    [36] Agathis lanceolata
    Last Modified in 05/18/20
    15552010001
    [37] Agathis macrophylla
    Last Modified in 05/18/20
    15552010001
    [38] Agathis microstachya
    Last Modified in 05/18/20
    05452011001
    [39] Agathis montana
    Last Modified in 05/18/20
    15352010001
    [40] Agathis moorei
    Last Modified in 05/18/20
    15452010001
    [41] Agathis ovata
    Last Modified in 05/18/20
    15452010001
    [42] Agathis lenticula
    Last Modified in 05/18/20
    05652011001
    [43] † Agathis zamunerae
    Last Modified in 05/18/20
    21373507001
    [44] † Agathis immortalis
    Last Modified in 05/18/20
    18403807001
    [45] Wollemia nobilis
    Last Modified in 05/18/20
    25250011001
    [46] † Araucaria mirabilis
    Last Modified in 05/18/20
    34232108001
    [47] † Araucarites bindrabunensis
    Last Modified in 05/18/20
    38181807001
    [48] † Araucaria sphaerocarpa
    Last Modified in 05/18/20
    36202007001
    [49] † Araucaria nipponensis
    Last Modified in 05/18/20
    37221907001
    [50] † Araucaria vulgaris
    Last Modified in 05/18/20
    37201907001
    [51] † Araucaria brownii
    Last Modified in 05/18/20
    39181806001
    [52] † Wairarapaia mildenhalli
    Last Modified in 05/18/20
    39202004001
    [53] † Emwadea microcarpa
    Last Modified in 05/18/20
    28282807001
    [54] Saxegothea conspicua
    Last Modified in 05/18/20
    612200001
    [55] † Araucaria huncoensis
    Last Modified in 05/18/20
    242929010001
    [56] † Araucaria pichileufensis
    Last Modified in 05/18/20
    223131010001


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    Taxon list5
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    Bibliography3
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    Matrix views17Matrix landing page (8 views); Morphological Matrix from Rossetto-Harris et al (2020) (prepared by MorphoBank curators from original submission) (9 views);




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    Total downloads from project10
    Project downloads4
    Document downloads1combined morphological and molecular matrix (1 download);
    Matrix downloads5Morphological Matrix from Rossetto-Harris et al (2020) (prepared by MorphoBank curators from original submission) (5 downloads);