Project 2600: N. A. Jud, M. A. Gandolfo. 2020. Fossil evidence from South America for the diversification of Cunoniaceae by the earliest Palaeocene. Annals of Botany. epub ahead of print:none yet.
Specimen: † Cunoniantha bicarpellata (MPEF:MPEFpb-8523)
View: lateral compression

Abstract

Background and Aims: Cunoniaceae are woody plants with a distribution that suggests a complex history of Gondwanan vicariance, long-distance dispersal, diversification, and extinction. Only four out of c. 27 genera in Cunoniaceae are native to South America today, but the discovery of extinct species from Argentine Patagonia is providing new information about the history of this family in South America Methods: We describe fossil flowers collected from early Danian (early Palaeocene, ~64 Mya) deposits of the Salamanca Formation. We compare them with similar flowers from extant and extinct species using published literature and herbarium specimens. We used simultaneous analysis of morphology and available chloroplast DNA sequences (trnL–F, rbcL, matK, trnH–psbA) to determine the probable relationship of these fossils to living Cunoniaceae and the co-occurring fossil species Lacinipetalum spectabilum Key results: Cunoniantha bicarpellata gen. et sp. nov. is the second species of Cunoniaceae to be recognized among the flowers preserved in the Salamanca Formation. Cunoniantha flowers are pentamerous, complete, the anthers contain in-situ pollen, and the gynoecium is bicarpellate and syncarpous with two free styles. Phylogenetic analysis indicates that Cunoniantha belongs to crown-group Cunoniaceae among the core-Cunoniaceae clade; although it does not have obvious affinity with any tribe. Lacinipetalum spectabilum, also from the Salamanca Formation, belongs to the Cunoniaceae crown-group as well, but close to tribe Schizomerieae Conclusions: Our findings highlight the importance of west Gondwana in the evolution of Cunoniaceae during the early Palaeogene. The co-occurrence of Cunoniantha bicarpellata and Lacinipetalum spectabilum, belonging to different clades within Cunoniaceae, indicates that the diversification of crown-group Cunoniaceae was underway by 64 million years ago


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Article DOI: 10.1093/aob/mcaa154

Project DOI: 10.7934/P2600, http://dx.doi.org/10.7934/P2600
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 60 Taxa
  • 15 Specimens
  • 58 Characters
Total size of project's media files: 3.15M

Download Project SDD File
Total scored cells: 2326
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 58
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 153
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:58/0
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MorphoBank Project 2600
  • Creation Date:
    23 January 2017
  • Publication Date:
    06 September 2020
  • Project views: 66

    This research
    supported by

    Authors' Institutions

    • Cornell University

    • William Jewell College



    Members

    member name taxa specimens media chars character
    comms
       
    media
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    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
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    Nathan Jud
    Project Administrator
    Last logged in 09/06/20
    60151580002326
    (2182, 0, 144)
    000
    Maria Alejandra Gandolfo
    Full membership
    Last logged in Never
    00000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M26123' (42 Taxa)

    taxon unscored
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    scored
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    no cell
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    NPA
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    "-" cellscell images labels on
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    [1] Spiraeanthemum samoense
    Last Modified in 06/26/19
    0515107002
    [2] Spiraeanthemum ellipticum
    Last Modified in 06/26/19
    0515107002
    [3] Brunellia oliveri
    Last Modified in 06/26/19
    0535305002
    [4] Brunellia colombiana
    Last Modified in 06/26/19
    0535305002
    [5] Davidsonia jerseyana
    Last Modified in 06/26/19
    1535304002
    [6] Davidsonia johnsonii
    Last Modified in 06/26/19
    2515105002
    [7] Bauera sessiliflora
    Last Modified in 06/26/19
    1505007002
    [8] Bauera rubioides
    Last Modified in 06/26/19
    0515107002
    [9] Eucryphia cordifolia
    Last Modified in 06/26/19
    0555503002
    [10] Eucryphia moorei
    Last Modified in 06/26/19
    0575602002
    [11] Hooglandia ignambiensis
    Last Modified in 06/26/19
    10454503002
    [12] Anodopetalum biglandulosum
    Last Modified in 06/26/19
    0555503002
    [13] Platylophus trifoliatus
    Last Modified in 06/26/19
    0555503002
    [14] Ceratopetalum gummiferum
    Last Modified in 06/26/19
    0555503002
    [15] Ceratopetalum apetalum
    Last Modified in 06/26/19
    0545404002
    [16] Schizomeria serrata
    Last Modified in 06/26/19
    0555503002
    [17] Schizomeria ovata
    Last Modified in 06/26/19
    0555503002
    [18] Gillbeea adenopetala
    Last Modified in 06/26/19
    0535305002
    [19] Geissois superba
    Last Modified in 06/26/19
    0525206002
    [20] Karrabina benthamiana
    Last Modified in 06/26/19
    0515107002
    [21] Pseudoweinmannia lachnocarpa
    Last Modified in 06/26/19
    1505007002
    [22] Pullea glabra
    Last Modified in 06/26/19
    2515105002
    [23] Weinmannia raiateensis
    Last Modified in 05/23/20
    1565601002
    [24] Weinmannia bangii
    Last Modified in 06/26/19
    0575701002
    [25] Weinmannia fraxinea
    Last Modified in 06/26/19
    0575701002
    [26] Weinmannia minutiflora
    Last Modified in 06/26/19
    0575701002
    [27] Weinmannia madagascariensis
    Last Modified in 06/26/19
    0575701002
    [28] Cunonia atrorubens
    Last Modified in 06/26/19
    1565601002
    [29] Cunonia capensis
    Last Modified in 06/26/19
    0575701002
    [30] Pancheria engleriana
    Last Modified in 06/26/19
    0565602002
    [31] Vesselowskya rubifolia
    Last Modified in 06/26/19
    0565602002
    [32] Callicoma serratifolia
    Last Modified in 06/26/19
    1535304002
    [33] Codia discolor
    Last Modified in 06/26/19
    4515103002
    [34] Acrophyllum australe
    Last Modified in 06/26/19
    1535304002
    [35] Caldcluvia paniculata
    Last Modified in 06/26/19
    0545404002
    [36] Ackama rosifolia
    Last Modified in 06/26/19
    2545402002
    [37] Spiraeopsis celebica
    Last Modified in 06/26/19
    1575700002
    [38] Opocunonia nymanii
    Last Modified in 06/26/19
    2565600002
    [39] Lamanonia ternata
    Last Modified in 06/26/19
    0525206002
    [40] Aistopetalum viticoides
    Last Modified in 06/26/19
    5484805002
    [41] † Lacinipetalum spectabilum
    Last Modified in 06/26/19
    38202000002
    [42] † Cunoniantha bicarpellata
    Last Modified in 06/26/19
    38191901002


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    Project overview22
    Matrix views20CunoniaceaeMorphology (9 views); Matrix landing page (11 views);
    Specimen list3
    Media views16Media search (15 views); M584531 (1 view);
    Taxon list2
    Bibliography1
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