@ARTICLE{TreeBASE2Ref17196,
author = {Elpidio A. Remigio and Dwayne A. W. Lepitzki and Jacqueline S. Lee and Paul D. N. Hebert},
title = {Molecular systematic relationships and evidence for a recent origin of the thermal spring endemic snails Physella johnsoni and Physella wrighti (Pulmonata: Physidae).},
year = {2001},
keywords = {},
doi = {10.1139/cjz-79-11-1941},
url = {},
pmid = {},
journal = {Canadian Journal of Zoology},
volume = {79},
number = {},
pages = {1941--1950},
abstract = {The evolutionary origins of Physella johnsoni and Physella wrighti, freshwater snails endemic to thermal springs in Alberta and British Columbia, were examined by sequence comparisons of mitochondrial genes coding for segments of the large subunit ribosomal RNA (16S) and cytochrome c oxidase I (COI) with those in the closely allied species, Physella gyrina. Phylogenetic reconstructions based on combined and separate analyses of the data sets identified P. wrighti as the sister taxon to a P. johnsoni + P. gyrina clade. For both gene regions, there was little or no sequence variation among conspecific individuals, but a number of diagnostic differences existed between each of the species pairs. Tree topologies and estimates of sequence divergence indicate that the divergence events which separated the three species occurred rather recently and at relatively brief intervals, and it is likely that P. wrighti is the source of the ancestral population from which P. johnsoni and P. gyrina were derived. Our findings support the recognition of P. johnsoni and P. wrighti as endemic species. The populations of P. johnsoni probably separated from P. gyrina about 10,000 years ago, when glaciers retreated from the Banff area and pre-historic lake levels dropped. The limited molecular divergence between P. johnsoni and P. gyrina argues against their current placement in different subgenera within the genus Physella.}
}
Citation for Study 842
Citation title:
"Molecular systematic relationships and evidence for a recent origin of the thermal spring endemic snails Physella johnsoni and Physella wrighti (Pulmonata: Physidae).".
This study was previously identified under the legacy study ID S701
(Status: Published).
Citation
Remigio E., Lepitzki D., Lee J., & Hebert P. 2001. Molecular systematic relationships and evidence for a recent origin of the thermal spring endemic snails Physella johnsoni and Physella wrighti (Pulmonata: Physidae). Canadian Journal of Zoology, 79: 1941-1950.
Authors
-
Remigio E.
-
Lepitzki D.
-
Lee J.
-
Hebert P.
Abstract
The evolutionary origins of Physella johnsoni and Physella wrighti, freshwater snails endemic to thermal springs in Alberta and British Columbia, were examined by sequence comparisons of mitochondrial genes coding for segments of the large subunit ribosomal RNA (16S) and cytochrome c oxidase I (COI) with those in the closely allied species, Physella gyrina. Phylogenetic reconstructions based on combined and separate analyses of the data sets identified P. wrighti as the sister taxon to a P. johnsoni + P. gyrina clade. For both gene regions, there was little or no sequence variation among conspecific individuals, but a number of diagnostic differences existed between each of the species pairs. Tree topologies and estimates of sequence divergence indicate that the divergence events which separated the three species occurred rather recently and at relatively brief intervals, and it is likely that P. wrighti is the source of the ancestral population from which P. johnsoni and P. gyrina were derived. Our findings support the recognition of P. johnsoni and P. wrighti as endemic species. The populations of P. johnsoni probably separated from P. gyrina about 10,000 years ago, when glaciers retreated from the Banff area and pre-historic lake levels dropped. The limited molecular divergence between P. johnsoni and P. gyrina argues against their current placement in different subgenera within the genus Physella.
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S842
- Other versions:
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- Show BibTeX reference
@ARTICLE{TreeBASE2Ref17196,
author = {Elpidio A. Remigio and Dwayne A. W. Lepitzki and Jacqueline S. Lee and Paul D. N. Hebert},
title = {Molecular systematic relationships and evidence for a recent origin of the thermal spring endemic snails Physella johnsoni and Physella wrighti (Pulmonata: Physidae).},
year = {2001},
keywords = {},
doi = {10.1139/cjz-79-11-1941},
url = {},
pmid = {},
journal = {Canadian Journal of Zoology},
volume = {79},
number = {},
pages = {1941--1950},
abstract = {The evolutionary origins of Physella johnsoni and Physella wrighti, freshwater snails endemic to thermal springs in Alberta and British Columbia, were examined by sequence comparisons of mitochondrial genes coding for segments of the large subunit ribosomal RNA (16S) and cytochrome c oxidase I (COI) with those in the closely allied species, Physella gyrina. Phylogenetic reconstructions based on combined and separate analyses of the data sets identified P. wrighti as the sister taxon to a P. johnsoni + P. gyrina clade. For both gene regions, there was little or no sequence variation among conspecific individuals, but a number of diagnostic differences existed between each of the species pairs. Tree topologies and estimates of sequence divergence indicate that the divergence events which separated the three species occurred rather recently and at relatively brief intervals, and it is likely that P. wrighti is the source of the ancestral population from which P. johnsoni and P. gyrina were derived. Our findings support the recognition of P. johnsoni and P. wrighti as endemic species. The populations of P. johnsoni probably separated from P. gyrina about 10,000 years ago, when glaciers retreated from the Banff area and pre-historic lake levels dropped. The limited molecular divergence between P. johnsoni and P. gyrina argues against their current placement in different subgenera within the genus Physella.}
}
- Show RIS reference
TY - JOUR
ID - 17196
AU - Remigio,Elpidio A.
AU - Lepitzki,Dwayne A. W.
AU - Lee,Jacqueline S.
AU - Hebert,Paul D. N.
T1 - Molecular systematic relationships and evidence for a recent origin of the thermal spring endemic snails Physella johnsoni and Physella wrighti (Pulmonata: Physidae).
PY - 2001
UR - http://dx.doi.org/10.1139/cjz-79-11-1941
N2 - The evolutionary origins of Physella johnsoni and Physella wrighti, freshwater snails endemic to thermal springs in Alberta and British Columbia, were examined by sequence comparisons of mitochondrial genes coding for segments of the large subunit ribosomal RNA (16S) and cytochrome c oxidase I (COI) with those in the closely allied species, Physella gyrina. Phylogenetic reconstructions based on combined and separate analyses of the data sets identified P. wrighti as the sister taxon to a P. johnsoni + P. gyrina clade. For both gene regions, there was little or no sequence variation among conspecific individuals, but a number of diagnostic differences existed between each of the species pairs. Tree topologies and estimates of sequence divergence indicate that the divergence events which separated the three species occurred rather recently and at relatively brief intervals, and it is likely that P. wrighti is the source of the ancestral population from which P. johnsoni and P. gyrina were derived. Our findings support the recognition of P. johnsoni and P. wrighti as endemic species. The populations of P. johnsoni probably separated from P. gyrina about 10,000 years ago, when glaciers retreated from the Banff area and pre-historic lake levels dropped. The limited molecular divergence between P. johnsoni and P. gyrina argues against their current placement in different subgenera within the genus Physella.
L3 - 10.1139/cjz-79-11-1941
JF - Canadian Journal of Zoology
VL - 79
IS -
SP - 1941
EP - 1950
ER -
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