Project 3807: R. A. Stockey, G. L. Hoffman, G. W. Rothwell. 2021. Fossil evidence for Paleocene diversification of Araceae: Bognerospadix gen. nov. and Orontiophyllum grandifolium comb. nov. American Journal of Botany. 108 (8):1417-1440.
Specimen: Bognerospadix speirsiae (unvouchered)
View: histological section

Abstract

PREMISE OF THE STUDY: Nearly 200 araceous leaves and two spadices have been identified among Paleocene fossils from the Blindman River locality near Blackfalds, Alberta, Canada. Although not found in attachment, these probably represent parts of the same plant.
METHODS: Specimens were studied using light microscopy. Phylogenetic analyses using a modified morphological matrix of living and fossil Araceae were performed using TNT version 1.5 to help establish the relationships of the fossil leaves and spadices within Araceae and to each other.
KEY RESULTS: Leaves are simple with a broad petiole and entire-margined, elliptic to ovate or oblong blade with an acute to slightly rounded apex. A multi-veined midrib extends into the basal region of the blade, from which parallelodromous primary veins of two orders diverge at acute angles, converging with a submarginal vein or at the apex. Transverse veins are opposite percurrent, producing rectangular to polygonal areoles with mixed opposite/alternate higher-order veins. Spadices are cylindric, with helically arranged, bisexual, perigonate flowers, each with six free tepals and a protruding style. Fruits are trilocular, with axile placentation and one seed per locule.
CONCLUSIONS: Leaves are assignable to the fossil genus Orontiophyllum J. Kvaček & S. Y. Smith as O. grandifolium comb. nov. Spadices are described as Bognerospadix speirsiae gen. et sp. nov. Leaves and spadices each conform to an early-diverging lineage of Araceae, increasing the known diversity of Proto-Araceae. Together, they provide strong evidence for extinct Proto-Araceae with novel combinations of characters shortly after the Cretaceous-Paleogene floral transition, increasing our understanding of aroid evolution.


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Article DOI: 10.1002/ajb2.1707

Project DOI: 10.7934/P3807, http://dx.doi.org/10.7934/P3807
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 96 Taxa
  • 1 Specimen
  • 83 Characters
Total size of project's media files: 587.8k

Download Project SDD File
Total scored cells: 7432
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 83
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 246
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:83/0
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MorphoBank Project 3807
  • Creation Date:
    10 September 2020
  • Publication Date:
    10 August 2021
  • Project views: 1565

    Authors' Institutions

    • Ohio University

    • Oregon State University



    Members

    member name taxa specimens media chars character
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    Gar Rothwell
    Project Administrator
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    Taxonomic Overview for Matrix 'M26933' (96 Taxa)

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    [1] Acorus
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    [2] AGLAONEMATEAE
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    [3] Alloschemone
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    [4] Alocasia
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    1828002001
    [5] Ambrosina
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    6757502001
    [6] THOMSONIEAE
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    1807903001
    [7] Amydrium
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    7727006001
    [8] Anadendrum
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    2777605001
    [9] Anaphyllopsis
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    9707004001
    [10] Anaphyllum
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    6747304001
    [11] Anchoman plus Pshyd
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    [12] Anthurium
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    [13] Anubias
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    [14] Ariopsis
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    [15] Arisaema
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    [16] Arisarum
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    [17] AROPHYTEAE
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    [18] Arum
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    [19] Asterostigma
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    [20] Biarum
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    [21] Bognera
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    [22] Caladium plus Syngon
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    [23] Calla
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    [24] Callopsis
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    [25] Chlorospatha plus Xan
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    [26] Colocasia plus RS
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    [27] Croatiella
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    [28] RHEOPHYTE clade
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    [29] CULCASIEAE
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    [30] Cyrtosperma
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    [31] Dieffenbachia
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    [32] Dracontioides
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    [33] Dracontium
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    [34] Dracunculus
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    [35] Eminium
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    [36] Epipremnum
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    [37] Filarum
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    [38] Gearum
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    [39] Gonatopus
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    [40] Gorgonidium
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    [41] Gymnostachys
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    [42] Hapaline
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    [43] Helicodiceros
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    [44] Heteropsis
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    [45] Holochlamys
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    [46] Incarum
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    [47] Jasarum
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    [48] Lasia
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    [49] Lasimorpha
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    [50] Lysichiton
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    [51] Mangonia
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    [52] Monstera
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    [53] Montrichardia
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    [54] Nephthytis
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    [55] Orontium
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    [56] Pedicellarum
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    [57] Peltandra
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    [58] PHILODENDRON cl
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    [59] Pinellia
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    [60] Pistia
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    [61] Podolasia
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    [62] Pothoidium
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    [63] Pothos
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    [64] Protarum
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    12696902001
    [65] Pycnospatha
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    [66] Rhaphidophora
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    [67] Rhodospatha
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    [68] Sauromatum
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    [69] Scaphispatha
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    [70] Scindapsus
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    [71] Spathantheum
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    [72] Spathicarpa
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    [73] Spathiphyllum
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    [74] Stenospermation
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    [75] Stylochaeton
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    6787700001
    [76] Symplocarpus
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    [77] Synandrospadix
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    [78] Taccarum
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    [79] Theriophonum
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    [80] Turolospadix bogneri
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    [81] Typhonium
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    [82] Typhonodorum
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    [83] Ulearum
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    [84] Urospatha
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    [85] Zamioculcas
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    [86] Zantedeschia
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    [87] Zomicarpa
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    [88] Zomicarpella
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    [89] Tofieldia
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    13666406001
    [90] Lemna
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    45352027001
    [91] Spirodela
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    [92] Landoltia
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    [93] Wolffia
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    [94] Wolffiella
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    [95] Orontiophyllum austriacum
    Last Modified in 09/14/20
    72111100001
    [96] Bognerospadix speirsiae
    Last Modified in 09/14/20
    52282803001


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    Project overview89
    Bibliography41
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    Media views214Media search (185 views); M693802 (29 views);
    Views for media list78
    Specimen list113
    Taxon list950




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