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.
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.Read the article »
Article DOI: 10.2307/25065430
Project DOI: 10.7934/P3626, http://dx.doi.org/10.7934/P3626
This project contains | Matrices |
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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
MorphoBank Project 3626
- Creation Date:
29 January 2020 - Publication Date:
30 January 2020 - Project views: 13668
- Matrix downloads: 6
This research
supported by
Authors' Institutions
- Ohio University
- University of Alberta
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Ana Andruchow-Colombo Project Administrator | 23 | 2 | 1 | 57 | 0 | 0 | 1034 (1034, 0, 0) | 0 | 0 | 0 | ||||
Gar Rothwell Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M26431' (22 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Aethophyllum stipulare Last Modified in 01/30/20 | 6 | 51 | 51 | 0 | 0 | 0 | 0 | 2 |
[2] † Barthelia furcata Last Modified in 01/30/20 | 5 | 54 | 52 | 0 | 0 | 0 | 0 | 2 |
[3] † Callistophyton poroxyloides Last Modified in 01/30/20 | 6 | 51 | 51 | 0 | 0 | 0 | 0 | 2 |
[4] † Concholepis harrisii Last Modified in 01/30/20 | 30 | 28 | 27 | 0 | 0 | 0 | 0 | 2 |
[5] † Cordaixylon dumusum Last Modified in 01/30/20 | 1 | 56 | 56 | 0 | 0 | 0 | 0 | 2 |
[6] † Dicranophyllum hallei Last Modified in 01/30/20 | 21 | 36 | 36 | 0 | 0 | 0 | 0 | 2 |
[7] † Dolomitia cittertiae Last Modified in 01/30/20 | 24 | 34 | 33 | 0 | 0 | 0 | 0 | 2 |
[8] † Emporia spp Last Modified in 01/30/20 | 0 | 58 | 57 | 0 | 0 | 0 | 0 | 2 |
[9] † Ernestiodendron filiciforme Last Modified in 01/30/20 | 8 | 49 | 49 | 0 | 0 | 0 | 0 | 2 |
[10] † Ferugliocladus spp Last Modified in 01/30/20 | 2 | 55 | 55 | 0 | 0 | 0 | 0 | 2 |
[11] † Genoites patagonica Last Modified in 01/30/20 | 19 | 38 | 38 | 0 | 0 | 0 | 0 | 2 |
[12] † Hanskerpia hamiltonensis Last Modified in 01/30/20 | 9 | 48 | 48 | 0 | 0 | 0 | 0 | 2 |
[13] † Majonica alpina Last Modified in 01/30/20 | 12 | 45 | 45 | 0 | 0 | 0 | 0 | 2 |
[14] † Mesoxylon priapii Last Modified in 01/30/20 | 1 | 56 | 56 | 0 | 0 | 0 | 0 | 2 |
[15] † Kungurodendron sharovii Last Modified in 01/30/20 | 12 | 46 | 45 | 0 | 0 | 0 | 0 | 2 |
[16] † Ortiseia spp Last Modified in 01/30/20 | 9 | 49 | 48 | 0 | 0 | 0 | 0 | 2 |
[17] † Otovicia hypnoides Last Modified in 01/30/20 | 2 | 58 | 55 | 0 | 0 | 0 | 0 | 2 |
[18] † Thucydia mahoningensis Last Modified in 01/30/20 | 1 | 57 | 56 | 0 | 0 | 0 | 0 | 2 |
[19] † Timanostrobus muravievii Last Modified in 01/30/20 | 13 | 44 | 44 | 0 | 0 | 0 | 0 | 2 |
[20] † Utrechtia floriniformis Last Modified in 01/30/20 | 14 | 45 | 43 | 0 | 0 | 0 | 0 | 2 |
[21] † Voltzia hexagona Last Modified in 01/30/20 | 14 | 43 | 43 | 0 | 0 | 0 | 0 | 2 |
[22] † Vojnovskyean plant Last Modified in 01/30/20 | 24 | 33 | 33 | 0 | 0 | 0 | 0 | 2 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 13668 | |
Project overview | 990 | |
Media views | 2380 | Media search (2027 views); M684271 (353 views); |
Matrix views | 783 | Matrix landing page (672 views); Morphological matrix from Rothwell et al. 2005 (prepared by MorphoBank curators from original submission) (111 views); |
Documents list | 705 | |
Views for media list | 788 | |
Specimen list | 1872 | |
Taxon list | 5667 | |
Bibliography | 483 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 132 | |
Project downloads | 125 | |
Matrix downloads | 6 | Morphological matrix from Rothwell et al. 2005 (prepared by MorphoBank curators from original submission) (6 downloads); |
Document downloads | 1 | Matrix and Character list in pdf format (1 download); |