New Records of the Putative Arctic / Sub-Arctic / Alpine Liverwort Preissia quadrata ssp. hyperborea R.M. Schust. (Marchantiopsida, Marchantiaceae) in Canada
Preissia quadrata (Scop.) Nees (Marchantiopsida, Marchantiaceae) is a northern hemisphere species usually defined as having two geographically distinct subspecies: Preissia quadrata (Scop.) Nees ssp. quadrata and P. quadrata ssp. hyperborea R.M. Schust. The subspecies quadrata is considered to have...
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The American Bryological and Lichenological Society
2016
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ftbioone:10.1639/0747-9859-33.2.83 2023-07-30T04:00:52+02:00 New Records of the Putative Arctic / Sub-Arctic / Alpine Liverwort Preissia quadrata ssp. hyperborea R.M. Schust. (Marchantiopsida, Marchantiaceae) in Canada Richard T. Caners Richard T. Caners world 2016-06-01 text/HTML https://doi.org/10.1639/0747-9859-33.2.83 en eng The American Bryological and Lichenological Society doi:10.1639/0747-9859-33.2.83 All rights reserved. https://doi.org/10.1639/0747-9859-33.2.83 Text 2016 ftbioone https://doi.org/10.1639/0747-9859-33.2.83 2023-07-09T11:00:22Z Preissia quadrata (Scop.) Nees (Marchantiopsida, Marchantiaceae) is a northern hemisphere species usually defined as having two geographically distinct subspecies: Preissia quadrata (Scop.) Nees ssp. quadrata and P. quadrata ssp. hyperborea R.M. Schust. The subspecies quadrata is considered to have a temperate-boreal distribution, whereas the subspecies hyperborea is probably restricted to Arctic / Sub-Arctic / alpine regions. Until recently, the subspecies hyperborea had been documented from only a few jurisdictions in North America. This article describes new records of the subspecies hyperborea in Canada, including the first reports for Alberta based on field collections, and for Labrador, Northwest Territories, and the Yukon based on annotations of herbarium collections of Preissia quadrata that belong to the subspecies hyperborea. An updated distribution map of the subspecies hyperborea in North America is provided. The subspecies hyperborea is shown to be more widely distributed in northern and montane regions of the continent than previously reported; however, some taxonomic impediments remain for the Preissia quadrata complex. An improved understanding of the phenology of the subspecies hyperborea across its range may facilitate its circumscription. Text Arctic Northwest Territories Yukon BioOne Online Journals Arctic Canada Northwest Territories Yukon Evansia 33 2 83 91 |
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English |
description |
Preissia quadrata (Scop.) Nees (Marchantiopsida, Marchantiaceae) is a northern hemisphere species usually defined as having two geographically distinct subspecies: Preissia quadrata (Scop.) Nees ssp. quadrata and P. quadrata ssp. hyperborea R.M. Schust. The subspecies quadrata is considered to have a temperate-boreal distribution, whereas the subspecies hyperborea is probably restricted to Arctic / Sub-Arctic / alpine regions. Until recently, the subspecies hyperborea had been documented from only a few jurisdictions in North America. This article describes new records of the subspecies hyperborea in Canada, including the first reports for Alberta based on field collections, and for Labrador, Northwest Territories, and the Yukon based on annotations of herbarium collections of Preissia quadrata that belong to the subspecies hyperborea. An updated distribution map of the subspecies hyperborea in North America is provided. The subspecies hyperborea is shown to be more widely distributed in northern and montane regions of the continent than previously reported; however, some taxonomic impediments remain for the Preissia quadrata complex. An improved understanding of the phenology of the subspecies hyperborea across its range may facilitate its circumscription. |
author2 |
Richard T. Caners |
format |
Text |
author |
Richard T. Caners |
spellingShingle |
Richard T. Caners New Records of the Putative Arctic / Sub-Arctic / Alpine Liverwort Preissia quadrata ssp. hyperborea R.M. Schust. (Marchantiopsida, Marchantiaceae) in Canada |
author_facet |
Richard T. Caners |
author_sort |
Richard T. Caners |
title |
New Records of the Putative Arctic / Sub-Arctic / Alpine Liverwort Preissia quadrata ssp. hyperborea R.M. Schust. (Marchantiopsida, Marchantiaceae) in Canada |
title_short |
New Records of the Putative Arctic / Sub-Arctic / Alpine Liverwort Preissia quadrata ssp. hyperborea R.M. Schust. (Marchantiopsida, Marchantiaceae) in Canada |
title_full |
New Records of the Putative Arctic / Sub-Arctic / Alpine Liverwort Preissia quadrata ssp. hyperborea R.M. Schust. (Marchantiopsida, Marchantiaceae) in Canada |
title_fullStr |
New Records of the Putative Arctic / Sub-Arctic / Alpine Liverwort Preissia quadrata ssp. hyperborea R.M. Schust. (Marchantiopsida, Marchantiaceae) in Canada |
title_full_unstemmed |
New Records of the Putative Arctic / Sub-Arctic / Alpine Liverwort Preissia quadrata ssp. hyperborea R.M. Schust. (Marchantiopsida, Marchantiaceae) in Canada |
title_sort |
new records of the putative arctic / sub-arctic / alpine liverwort preissia quadrata ssp. hyperborea r.m. schust. (marchantiopsida, marchantiaceae) in canada |
publisher |
The American Bryological and Lichenological Society |
publishDate |
2016 |
url |
https://doi.org/10.1639/0747-9859-33.2.83 |
op_coverage |
world |
geographic |
Arctic Canada Northwest Territories Yukon |
geographic_facet |
Arctic Canada Northwest Territories Yukon |
genre |
Arctic Northwest Territories Yukon |
genre_facet |
Arctic Northwest Territories Yukon |
op_source |
https://doi.org/10.1639/0747-9859-33.2.83 |
op_relation |
doi:10.1639/0747-9859-33.2.83 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1639/0747-9859-33.2.83 |
container_title |
Evansia |
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33 |
container_issue |
2 |
container_start_page |
83 |
op_container_end_page |
91 |
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1772811544795545600 |