Project 2340: R. A. Stockey, G. W. Rothwell, K. R. Johnson. 2016. Evaluating Relationships among Floating Aquatic Monocots: A New Species of Cobbania (Araceae) from the Upper Maastrichtian of South Dakota. International Journal of Plant Sciences. 177:706-725.

Abstract

• Premise of the study: A large number of fossilized floating aquatic aroids have been recovered from pond sediments in the Hell Creek Formation (Upper Cretaceous) of Harding County, South Dakota, providing valuable new data from which to characterize aquatic vegetation of the uppermost Cretaceous, to describe a new species of the genus Cobbania, and to evaluate both the relevance of associated reproductive structures and the phylogenetic relationships among floating aquatic monocots.
• Methods: Specimens on split surfaces were uncovered as needed with fine needles to reveal surface features of the specimens. Images were captured with a digital scanning camera, and phylogenetic analyses were conducted using TNT implemented through WINCLADA.
• Key results: The new species, Cobbania hickeyi Stockey, Rothwell & Johnson extends the range of the genus to the uppermost Cretaceous, supports the taxonomic integrity of the genus Cobbania, and increases our understanding of structural variation and species richness within the genus. Associated reproductive structures include an aroid spadix strengthening the assignment of Cobbania to the Araceae. A phylogenetic analysis of morphological characters supports earlier results from morphological analyses about relationships among floating aquatic aroids, but the fossil taxon Aquaephyllum does not nest among the floating aquatic species.
• Conclusions: Species of the genus Cobbania were an important component of aquatic vegetation during the Late Cretaceous. A test of competing hypotheses for relationships among Pistia stratiotes, Cobbania spp., and species of Lemnaceae Lemnoideae indicates the results from analyses of morphological characters continue to contradict those from the analysis of nucleotide sequence characters.


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Article DOI: https://doi.org/10.1086/688285

Project DOI: 10.7934/P2340, http://dx.doi.org/10.7934/P2340
This project containsMatrices
  • 1 Media
  • 3 Matrices
  • 1 Document
  • 43 Taxa
  • 1 Specimen
  • 48 Characters
Total size of project's media files: 2 MB

Download Project SDD File
Total scored cells: 4857
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 135
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 139
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:135/0
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MorphoBank Project 2340


    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Gar Rothwell
    Project Administrator
    Last logged in 07/14/17
    4311135004857
    (4659, 0, 198)
    000


    Taxonomic Overview for Matrix 'M23699' (40 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Acorus
    Last Modified in 04/30/16
    0434300001
    [2] Alisma
    Last Modified in 04/30/16
    0434201001
    [3] Alloschemone
    Last Modified in 04/30/16
    1393903001
    [4] Ambrosina
    Last Modified in 04/30/16
    1424101001
    [5] Amorphophallus
    Last Modified in 04/30/16
    0444102001
    [6] Anadendrum
    Last Modified in 04/30/16
    0414102001
    [7] † Aquaephyllum
    Last Modified in 07/14/17
    29141400001
    [8] Arisaema
    Last Modified in 04/30/16
    0464201001
    [9] Arisarum
    Last Modified in 04/30/16
    1414002001
    [10] Arophyton
    Last Modified in 04/30/16
    0404003001
    [11] Butomus
    Last Modified in 04/30/16
    0414102001
    [12] Callopsis
    Last Modified in 04/30/16
    0414102001
    [13] Carlephyton
    Last Modified in 04/30/16
    0414003001
    [14] † Cobbania corrugata
    Last Modified in 07/14/17
    19242400001
    [15] † Cobbania hickeyi
    Last Modified in 07/14/17
    19242400001
    [16] Colocasia
    Last Modified in 04/30/16
    1454200001
    [17] Cyrtosperma
    Last Modified in 04/30/16
    0444300001
    [18] Gorgonidium
    Last Modified in 04/30/16
    1424002001
    [19] Gymnostachys
    Last Modified in 04/30/16
    0424201001
    [20] Hydrocharis
    Last Modified in 04/30/16
    0414102001
    [21] Lemna
    Last Modified in 04/30/16
    0434102001
    [22] † Limnobiophyllum scutatum
    Last Modified in 07/14/17
    10343300001
    [23] Limnobium
    Last Modified in 04/30/16
    1404002001
    [24] Limnocharis
    Last Modified in 04/30/16
    0424201001
    [25] Ottelia
    Last Modified in 04/30/16
    1444101001
    [26] Philodendron
    Last Modified in 04/30/16
    1484101001
    [27] Pistia stratiotes
    Last Modified in 01/09/16
    0434300001
    [28] Peltandra
    Last Modified in 04/30/16
    0434201001
    [29] Pothos
    Last Modified in 04/30/16
    0414003001
    [30] Protarum
    Last Modified in 04/30/16
    0414003001
    [31] Sagittaria
    Last Modified in 04/30/16
    0424201001
    [32] Schismatoglottis
    Last Modified in 04/30/16
    0454003001
    [33] Spathicarpa
    Last Modified in 04/30/16
    0434003001
    [34] Spirodela
    Last Modified in 04/30/16
    0424102001
    [35] Stratiotes
    Last Modified in 04/30/16
    0424201001
    [36] Thalassia
    Last Modified in 04/30/16
    0424201001
    [37] Wolffia
    Last Modified in 04/30/16
    1404002001
    [38] Wolffiella
    Last Modified in 04/30/16
    1404002001
    [39] Zomicarpa
    Last Modified in 04/30/16
    0414003001
    [40] Zomicarpella
    Last Modified in 04/30/16
    0434102001


    Taxonomic Overview for Matrix 'M23955' (40 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Acorus
    Last Modified in 04/30/16
    0464600001
    [2] Alisma
    Last Modified in 04/30/16
    0474501001
    [3] Alloschemone
    Last Modified in 04/30/16
    1424203001
    [4] Ambrosina
    Last Modified in 04/30/16
    1454401001
    [5] Amorphophallus
    Last Modified in 04/30/16
    0474402001
    [6] Anadendrum
    Last Modified in 04/30/16
    0444402001
    [7] † Aquaephyllum auriculatum
    Last Modified in 07/14/17
    31151500001
    [8] Arisaema
    Last Modified in 04/30/16
    0494501001
    [9] Arisarum
    Last Modified in 04/30/16
    1444302001
    [10] Arophyton
    Last Modified in 04/30/16
    0434303001
    [11] Butomus
    Last Modified in 04/30/16
    0434303001
    [12] Callopsis
    Last Modified in 04/30/16
    0444402001
    [13] Carlephyton
    Last Modified in 04/30/16
    0444303001
    [14] † Cobbania corrugata
    Last Modified in 07/14/17
    21252500001
    [15] † Cobbania hickeyi
    Last Modified in 07/14/17
    21252500001
    [16] Colocasia
    Last Modified in 04/30/16
    1494500001
    [17] Cyrtosperma
    Last Modified in 04/30/16
    0474600001
    [18] Gorgonidium
    Last Modified in 04/30/16
    1454302001
    [19] Gymnostachys
    Last Modified in 04/30/16
    0454501001
    [20] Hydrocharis
    Last Modified in 04/30/16
    0434303001
    [21] Lemna
    Last Modified in 04/30/16
    0444204001
    [22] † Limnobiophyllum scutatum
    Last Modified in 07/14/17
    10373501001
    [23] Limnobium
    Last Modified in 04/30/16
    1424203001
    [24] Limnocharis
    Last Modified in 04/30/16
    0444402001
    [25] Ottelia
    Last Modified in 04/30/16
    1464302001
    [26] Peltandra
    Last Modified in 04/30/16
    0464501001
    [27] Philodendron
    Last Modified in 04/30/16
    1524401001
    [28] Pistia
    Last Modified in 04/30/16
    0464600001
    [29] Pothos
    Last Modified in 04/30/16
    0454303001
    [30] Protarum
    Last Modified in 04/30/16
    0444303001
    [31] Sagittaria
    Last Modified in 04/30/16
    0444402001
    [32] Schismatoglottis
    Last Modified in 04/30/16
    0494303001
    [33] Spathicarpa
    Last Modified in 04/30/16
    0464303001
    [34] Spirodela
    Last Modified in 04/30/16
    0434204001
    [35] Stratiotes
    Last Modified in 04/30/16
    0444402001
    [36] Thalassia
    Last Modified in 04/30/16
    0434303001
    [37] Wolffia
    Last Modified in 04/30/16
    1414104001
    [38] Wolffiella
    Last Modified in 04/30/16
    1414104001
    [39] Zomicarpa
    Last Modified in 04/30/16
    0444303001
    [40] Zomicarpella
    Last Modified in 04/30/16
    0464402001


    Taxonomic Overview for Matrix 'M23956' (31 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Acorus
    Last Modified in 04/30/16
    0464600001
    [2] Alloschemone
    Last Modified in 04/30/16
    1424203001
    [3] Ambrosina
    Last Modified in 04/30/16
    1454401001
    [4] Amorphophallus
    Last Modified in 04/30/16
    0474402001
    [5] Anadendrum
    Last Modified in 04/30/16
    0444402001
    [6] † Aquaephyllum auriculatum
    Last Modified in 07/14/17
    31151500001
    [7] Arisaema
    Last Modified in 04/30/16
    0494501001
    [8] Arisarum
    Last Modified in 04/30/16
    1444302001
    [9] Arophyton
    Last Modified in 04/30/16
    0434303001
    [10] Callopsis
    Last Modified in 04/30/16
    0444402001
    [11] Carlephyton
    Last Modified in 04/30/16
    0444303001
    [12] † Cobbania corrugata
    Last Modified in 07/14/17
    21252500001
    [13] † Cobbania hickeyi
    Last Modified in 07/14/17
    21252500001
    [14] Colocasia
    Last Modified in 04/30/16
    1494500001
    [15] Cyrtosperma
    Last Modified in 04/30/16
    0474600001
    [16] Gorgonidium
    Last Modified in 04/30/16
    1454302001
    [17] Gymnostachys
    Last Modified in 04/30/16
    0454501001
    [18] Lemna
    Last Modified in 04/30/16
    0444204001
    [19] † Limnobiophyllum scutatum
    Last Modified in 07/14/17
    10373501001
    [20] Peltandra
    Last Modified in 04/30/16
    0464501001
    [21] Philodendron
    Last Modified in 04/30/16
    1524401001
    [22] Pistia
    Last Modified in 04/30/16
    0464600001
    [23] Pothos
    Last Modified in 04/30/16
    0454303001
    [24] Protarum
    Last Modified in 04/30/16
    0444303001
    [25] Schismatoglottis
    Last Modified in 04/30/16
    0494303001
    [26] Spathicarpa
    Last Modified in 04/30/16
    0464303001
    [27] Spirodela
    Last Modified in 04/30/16
    0434204001
    [28] Wolffia
    Last Modified in 04/30/16
    1414104001
    [29] Wolffiella
    Last Modified in 04/30/16
    1414104001
    [30] Zomicarpa
    Last Modified in 04/30/16
    0444303001
    [31] Zomicarpella
    Last Modified in 04/30/16
    0464402001


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views4444
    Documents list283
    Specimen list471
    Taxon list1636
    Media views880Media search (765 views); M431940 (115 views);
    Project overview521
    Matrix views472Matrix landing page (360 views); Cobbania Hickeyi published matrix (45 views); IJPS Published Morphological Matrix (34 views); IJPS Aroids Only Morphological Matrix (33 views);
    Bibliography181




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project62
    Media downloads1M431940 (1 download);
    Project downloads49
    Matrix downloads12Cobbania Hickeyi published matrix (8 downloads); IJPS Published Morphological Matrix (2 downloads); IJPS Aroids Only Morphological Matrix (2 downloads);