Project 3613: R. A. Stockey, G. W. Rothwell. 2020. Diversification of crown group Araucaria : the role of Araucaria famii sp. nov. in the Late Cretaceous (Campanian) radiation of Araucariaceae in the Northern Hemisphere. American Journal of Botany. 107 (7):1072-1093.
Specimen: † Araucaria famii (CDM:050)
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Abstract

PREMISE OF THE STUDY: Exceptional anatomical preservation of a fossil araucarian seed cone from a marine carbonate concretion from Vancouver Island, British Columbia, Canada provides unusually complete evidence for cone structure including, seeds, megagametophytes, microgametophytes, and embryos of an Upper Cretaceous (Campanian) species of Araucaria, providing important new insights into the structure and relationships of Cretaceous Northern Hemisphere Araucariaceae.
METHODS: The cone was studied from serial thin sections prepared by the coal ball peel technique. Phylogenetic analysis using a modified morphological matrix with both discrete and continuous characters was performed using TNT version 1.5.
KEY RESULTS: The nearly spherical cone, 6 X 6 cm in diameter, has helically arranged cone-scale complexes, consisting of a large bract with an upturned tip and a small, fleshy ovuliferous scale. Vascularization of the cone-scale complex is single at its origin. Widely winged bracts, with a bulging base, contain numerous vascular bundles, interspersed with transfusion tissue, and a large number of resin canals. Seeds are ovoid, 1.2 cm long, 1.2 cm in diameter. Nucellus is free from the integument, except at its base, with a convoluted apex, containing possible pollen tubes, megagametophytes, and mature cellular embryos occur in several seeds.
CONCLUSIONS: This small cone, with attached, imbricate leaves, wide bracts and unusually large seeds, most closely resembles those of Araucaria Section Eutacta. Width and continuity of secondary xylem in the cone axis, and intact cone-scale complexes indicate that this cone probably did not disarticulate readily at maturity. When added to a modified, previously published phylogenetic analysis, Araucaria famii sp. nov. enhances our understanding the Cretacous radiation of Northern Hemisphere Araucaria Section Eutacta.


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Article DOI: 10.1002/ajb2.1505

Project DOI: 10.7934/P3613, http://dx.doi.org/10.7934/P3613
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 50 Taxa
  • 1 Specimen
  • 63 Characters
Total size of project's media files: 3.7M

Download Project SDD File
Total scored cells: 2850
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 3613
  • Creation Date:
    12 January 2020
  • Publication Date:
    31 August 2020
  • Project views: 74

    Authors' Institutions

    • Ohio University

    • Oregon State University



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Gar Rothwell
    Project Administrator
    Last logged in 08/31/20
    490063002850
    (2328, 0, 522)
    000


    Taxonomic Overview for Matrix 'M26418' (49 Taxa)

    taxon unscored
    cells
    scored
    cells
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    NPA
    cells
    "-" cellscell images labels on
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    [1] Cunninghamia lanceolata
    Last Modified in 01/13/20
    05453010001
    [2] Taiwania cryptomerioides
    Last Modified in 01/13/20
    2565209001
    [3] Cupressus sempervirens
    Last Modified in 01/13/20
    25551010001
    [4] Cupressus sargentii
    Last Modified in 01/13/20
    25551010001
    [5] Xanthocyparis vietnamensis
    Last Modified in 01/13/20
    15551011001
    [6] Podocarpus latifolius
    Last Modified in 01/13/20
    35049011001
    [7] Podocarpus macrophyllus
    Last Modified in 01/13/20
    25049012001
    [8] Dacrycarpus dacrydioides
    Last Modified in 01/13/20
    35149011001
    [9] Sciadopitys verticillata
    Last Modified in 01/13/20
    1575309001
    [10] Araucaria araucana
    Last Modified in 01/13/20
    05049014001
    [11] Araucaria angustifolia
    Last Modified in 01/13/20
    05049014001
    [12] Araucaria bidwillii
    Last Modified in 01/13/20
    05150013001
    [13] Araucaria hunsteinii
    Last Modified in 01/13/20
    05150013001
    [14] Araucaria bernieri
    Last Modified in 01/13/20
    05150013001
    [15] Araucaria biramulata
    Last Modified in 01/13/20
    05150013001
    [16] Araucaria columnaris
    Last Modified in 01/13/20
    05150013001
    [17] Araucaria cunninghamii
    Last Modified in 01/13/20
    05150013001
    [18] Araucaria heterophylla
    Last Modified in 01/13/20
    05150013001
    [19] Araucaria humboldtensis
    Last Modified in 01/13/20
    05150013001
    [20] Araucaria laubenfelsii
    Last Modified in 01/13/20
    05150013001
    [21] Araucaria luxurians
    Last Modified in 01/13/20
    05150013001
    [22] Araucaria montana
    Last Modified in 01/13/20
    05150013001
    [23] Araucaria muelleri
    Last Modified in 01/13/20
    05150013001
    [24] Araucaria nemorosa
    Last Modified in 01/13/20
    05150013001
    [25] Araucaria rulei
    Last Modified in 01/13/20
    05150013001
    [26] Araucaria schmidii
    Last Modified in 01/13/20
    25149012001
    [27] Araucaria scopulorum
    Last Modified in 01/13/20
    05150013001
    [28] Araucaria subulata
    Last Modified in 01/13/20
    05150013001
    [29] Agathis robusta
    Last Modified in 01/13/20
    05452011001
    [30] Agathis australis
    Last Modified in 01/13/20
    15652010001
    [31] Agathis dammara
    Last Modified in 01/13/20
    05552011001
    [32] Agathis atropurpurea
    Last Modified in 01/13/20
    05552011001
    [33] Agathis borneensis
    Last Modified in 01/13/20
    05452011001
    [34] Agathis lanceolata
    Last Modified in 01/13/20
    15552010001
    [35] Agathis macrophylla
    Last Modified in 01/13/20
    15552010001
    [36] Agathis microstachya
    Last Modified in 01/13/20
    05452011001
    [37] Agathis montana
    Last Modified in 01/13/20
    15352010001
    [38] Agathis moorei
    Last Modified in 01/13/20
    15452010001
    [39] Agathis ovata
    Last Modified in 01/13/20
    15452010001
    [40] † Araucaria famii
    Last Modified in 08/31/20
    19373707001
    [41] Wollemia nobilis
    Last Modified in 01/13/20
    05652011001
    [42] † Araucaria mirabilis
    Last Modified in 08/31/20
    24333108001
    [43] † Araucarites bindrabunensis
    Last Modified in 08/31/20
    38191906001
    [44] † Araucaria sphaerocarpa
    Last Modified in 08/31/20
    35222206001
    [45] † Araucaria nipponensis
    Last Modified in 08/31/20
    35252206001
    [46] † Araucaria vulgaris
    Last Modified in 08/31/20
    36222106001
    [47] † Araucaria brownii
    Last Modified in 08/31/20
    39191905001
    [48] Wairarapaia mildenhallii
    Last Modified in 01/13/20
    39202004001
    [49] Emwadea microcarpa
    Last Modified in 01/13/20
    30262607001


    Project views

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    Total project views74
    Project overview22
    Matrix views15TNT matrix (7 views); Matrix landing page (8 views);
    Media views23Media search (21 views); M693674 (2 views);
    Views for media list2
    Specimen list4
    Taxon list3
    Bibliography5