Project 3509: A. R. Scharfstein, R. A. Stockey, G. W. Rothwell. 2020. Evolution and Phylogeny of Altingiaceae: Anatomically Preserved Infructescences from Late Cretaceous Deposits of Vancouver Island, British Columbia, Canada. International Journal of Plant Sciences. 181 (4):452-463.
Specimen: † Protoaltingia comoxense (UAPC-ALTA/P14470 D bot :None)
View: cross and tangential sections of infructescence

Abstract

Premise of research. Five permineralized specimens of infructescences and dispersed fruits assignable to the Altingiaceae have been identified from the Late Cretaceous (Coniacian) Eden Main Quarry on Vancouver Island, British Columbia, Canada. Two infructescences and three isolated two-loculed fruits are preserved in calcium carbonate marine concretions.
Methodology. Concretions were sectioned using the cellulose acetate peel technique, and included in a phylogenetic analysis employing morphological characters using TNT.
Pivotal results. Infructescences are globose ca 1 cm in diameter, with at least 24 two-loculed fruits and a broad central axis. We have been unable to identify any perianth parts but there are knob-like extra-floral processes similar to the phyllomes of other altingeaceous infructescences. The inner fruit wall consists of a single palisade layer of elongate rectangular cells and several layers of thick-walled, elongate sclerenchyma. The outer fruit wall is well-differentiated with fiber bundles interspersed with parenchyma and resin canals. There are at least 16 seeds/carpel with axile placentation, but most of these are immature or aborted. Fruits have septicidal and ventricidal dehiscence. Specimens are assigned to Protoaltingia comoxense Scharfstein, Stockey & Rothwell gen. et. sp. nov.
Conclusions. These fossils represent the second most ancient occurrence of Altingiaceae, and phylogenetic analysis of morphological characters confirms that P. comoxense is most similar to species of Altingia. Results of the analysis resolve Altingia and Liquidambar as sister clades, placing P. comoxense as the basal member of the Altingia clade and sister to Altingia spp., thus documenting that evolutionary diversification of the core eudicot family Altingiaceae (Saxifragales) was well underway by the mid Upper Cretaceous.


Read the article »

Article DOI: 10.1086/707107

Project DOI: 10.7934/P3509, http://dx.doi.org/10.7934/P3509
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 15 Taxa
  • 2 Specimens
  • 51 Characters
Total size of project's media files: 2.72M

Download Project SDD File
Total scored cells: 660
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 51
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 117
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:51/0
Currently Viewing:
MorphoBank Project 3509
  • Creation Date:
    06 August 2019
  • Publication Date:
    26 June 2020
  • Project views: 137

    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 08/08/19
    1200000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M26173' (15 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Hamamelis virginiana
    Last Modified in 08/07/19
    6444401001
    [2] Exbucklandia populnea
    Last Modified in 08/07/19
    10404001001
    [3] Microaltingia apocarpela
    Last Modified in 08/07/19
    26252500001
    [4] † Protoaltingia comoxense
    Last Modified in 08/07/19
    28232300001
    [5] Altingia chinensis
    Last Modified in 08/07/19
    0515100001
    [6] Altingia excelsa
    Last Modified in 08/07/19
    0515100001
    [7] Altingia poilanei
    Last Modified in 08/07/19
    0515100001
    [8] Altingia gracilipes
    Last Modified in 08/07/19
    1505000001
    [9] Altingia siamensis
    Last Modified in 08/07/19
    0515100001
    [10] Liquidambar changii
    Last Modified in 08/07/19
    20313100001
    [11] Liquidambar acalycina
    Last Modified in 08/07/19
    0515100001
    [12] Liquidambar formosana
    Last Modified in 08/07/19
    0515100001
    [13] Liquidambar orientalis
    Last Modified in 08/07/19
    0515100001
    [14] Liquidambar styraciflua
    Last Modified in 08/07/19
    0515100001
    [15] Liquidambar fujianensis
    Last Modified in 08/07/19
    17373400001


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views137
    Project overview23
    Matrix views18Data matrix from author (5 views); Matrix landing page (13 views);
    Media views32Media search (29 views); M675957 (3 views);
    Taxon list29
    Specimen list17
    Views for media list11
    Bibliography7




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project4
    Project downloads4