Project 3626: G. W. Rothwell, G. Mapes, G. R. Hernandez-Castillo. 2005. Hanskerpia gen. nov. and phylogenetic relationships among the most ancient conifers (Voltziales). Taxon. 54 (3):733-750.
Specimen: † Hanskerpia hamiltonensis (16230/OUPH)
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Abstract

A new fossilized walchian (Voltziales) conifer plant from the Late Pennsylvanian Hamilton Quarry of Kansas, U.S.A. combines morphological characters of the morphogenus Walchia and the fossil plant genus Otovicia, with cuticular characters like those of the fossil plant genus Ernestiodendron, and seed cone morphology like that of the fossil plant genus Emporia. Internal anatomical characters are basically similar to the other walchian genera for which such features are known, but some are taxonomically informative. Numerical cladistic analysis reveals that this novel combination of characters defines a new fossil plant genus and species of walchian conifers Hanskerpia hamiltonensis. This analysis provides a test of hypotheses for relationships among walchian and other ancient conifers. Results of this analysis support some previously proposed relationships among the most primitive conifers and other Paleozoic coniferophytes. However, the analysis also calls to question the validity of all previously proposed familial circumscriptions for walchian conifers, and highlights the perplexing systematic challenges posed by the most ancient fossil conifers. The unexpected species richness of voltzialean conifers is interpreted as having resulted from the evolutionary ecology of unstable environments.


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Article DOI: 10.2307/25065430

Project DOI: 10.7934/P3626, http://dx.doi.org/10.7934/P3626
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 23 Taxa
  • 2 Specimens
  • 57 Characters
Total size of project's media files: 429.4k

Download Project SDD File
Total scored cells: 1034
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 57
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 157
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:57/0
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MorphoBank Project 3626

    This research
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    Authors' Institutions

    • Ohio University

    • University of Alberta



    Members

    member name taxa specimens media chars character
    media
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    (scored, NPA, "-")
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    Ana Andruchow-Colombo
    Project Administrator
    Last logged in 01/30/20
    232157001034
    (1034, 0, 0)
    000
    Gar Rothwell
    Full membership
    Last logged in 01/30/20
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M26431' (22 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
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    NPA
    cells
    "-" cellscell images labels on
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    [1] † Aethophyllum stipulare
    Last Modified in 01/30/20
    6515100002
    [2] † Barthelia furcata
    Last Modified in 01/30/20
    5545200002
    [3] † Callistophyton poroxyloides
    Last Modified in 01/30/20
    6515100002
    [4] † Concholepis harrisii
    Last Modified in 01/30/20
    30282700002
    [5] † Cordaixylon dumusum
    Last Modified in 01/30/20
    1565600002
    [6] † Dicranophyllum hallei
    Last Modified in 01/30/20
    21363600002
    [7] † Dolomitia cittertiae
    Last Modified in 01/30/20
    24343300002
    [8] † Emporia spp
    Last Modified in 01/30/20
    0585700002
    [9] † Ernestiodendron filiciforme
    Last Modified in 01/30/20
    8494900002
    [10] † Ferugliocladus spp
    Last Modified in 01/30/20
    2555500002
    [11] † Genoites patagonica
    Last Modified in 01/30/20
    19383800002
    [12] † Hanskerpia hamiltonensis
    Last Modified in 01/30/20
    9484800002
    [13] † Majonica alpina
    Last Modified in 01/30/20
    12454500002
    [14] † Mesoxylon priapii
    Last Modified in 01/30/20
    1565600002
    [15] † Kungurodendron sharovii
    Last Modified in 01/30/20
    12464500002
    [16] † Ortiseia spp
    Last Modified in 01/30/20
    9494800002
    [17] † Otovicia hypnoides
    Last Modified in 01/30/20
    2585500002
    [18] † Thucydia mahoningensis
    Last Modified in 01/30/20
    1575600002
    [19] † Timanostrobus muravievii
    Last Modified in 01/30/20
    13444400002
    [20] † Utrechtia floriniformis
    Last Modified in 01/30/20
    14454300002
    [21] † Voltzia hexagona
    Last Modified in 01/30/20
    14434300002
    [22] † Vojnovskyean plant
    Last Modified in 01/30/20
    24333300002


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views2346
    Project overview227
    Media views436Media search (381 views); M684271 (55 views);
    Matrix views192Matrix landing page (162 views); Morphological matrix from Rothwell et al. 2005 (prepared by MorphoBank curators from original submission) (30 views);
    Documents list151
    Views for media list124
    Specimen list283
    Taxon list849
    Bibliography84




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project41
    Project downloads36
    Matrix downloads4Morphological matrix from Rothwell et al. 2005 (prepared by MorphoBank curators from original submission) (4 downloads);
    Document downloads1Matrix and Character list in pdf format (1 download);