The maritime shrew, Sorex maritimensis (Insectivora : Soricidae): a newly recognized Canadian endemic.
Previous morphological and cytological analyses have suggested that the arctic shrew (Sorex arcticus) as currently recognized may be two distinct species. Specifically, those studies demonstrated considerable differentiation between the putative subspecies S. a. maritimensis and one or both of the o...
Published in: | Canadian Journal of Zoology |
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ftunivlausanne:oai:serval.unil.ch:BIB_6FE5237C3CC4 2024-02-11T10:00:52+01:00 The maritime shrew, Sorex maritimensis (Insectivora : Soricidae): a newly recognized Canadian endemic. Stewart, D.T. Perry, N. D. Fumagalli, L. 2002 https://serval.unil.ch/notice/serval:BIB_6FE5237C3CC4 https://doi.org/10.1139/Z01-207 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1139/Z01-207 info:eu-repo/semantics/altIdentifier/pissn/0008-4301 https://serval.unil.ch/notice/serval:BIB_6FE5237C3CC4 doi:10.1139/Z01-207 Canadian Journal of Zoology, vol. 80, no. 1, pp. 94-99 CYTOCHROME-B GENE EVOLUTION SEQUENCES info:eu-repo/semantics/article article 2002 ftunivlausanne https://doi.org/10.1139/Z01-207 2024-01-22T01:07:03Z Previous morphological and cytological analyses have suggested that the arctic shrew (Sorex arcticus) as currently recognized may be two distinct species. Specifically, those studies demonstrated considerable differentiation between the putative subspecies S. a. maritimensis and one or both of the other two subspecies, S. a. arcticus and S. a. laricorum. Phylogenetic analysis of 546 base pairs of cytochrome b sequence data from 10 arctic shrews from across Canada indicates that maritimensis is the sister-group to arcticus + laricorum. Furthermore, there is considerable genetic divergence between maritimensis and the other two putative subspecies (similar to8-9%; Kimura's two-parameter distance). Given that maritimensis and arcticus + laricorum appear to be reciprocally monophyletic clades with considerable genetic divergence (i.e., greater than that between other recognized pairs of sister-species within the S. araneus-arcticus group), we propose that S. maritimensis be recognized as a distinct species. The proportion of third-position transversion substitutions between S. arcticus and S. maritimensis suggests that these two species shared a common ancestor approximately 2.4 million years ago. Article in Journal/Newspaper Arctic Université de Lausanne (UNIL): Serval - Serveur académique lausannois Arctic Canada Canadian Journal of Zoology 80 1 94 99 |
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Open Polar |
collection |
Université de Lausanne (UNIL): Serval - Serveur académique lausannois |
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ftunivlausanne |
language |
English |
topic |
CYTOCHROME-B GENE EVOLUTION SEQUENCES |
spellingShingle |
CYTOCHROME-B GENE EVOLUTION SEQUENCES Stewart, D.T. Perry, N. D. Fumagalli, L. The maritime shrew, Sorex maritimensis (Insectivora : Soricidae): a newly recognized Canadian endemic. |
topic_facet |
CYTOCHROME-B GENE EVOLUTION SEQUENCES |
description |
Previous morphological and cytological analyses have suggested that the arctic shrew (Sorex arcticus) as currently recognized may be two distinct species. Specifically, those studies demonstrated considerable differentiation between the putative subspecies S. a. maritimensis and one or both of the other two subspecies, S. a. arcticus and S. a. laricorum. Phylogenetic analysis of 546 base pairs of cytochrome b sequence data from 10 arctic shrews from across Canada indicates that maritimensis is the sister-group to arcticus + laricorum. Furthermore, there is considerable genetic divergence between maritimensis and the other two putative subspecies (similar to8-9%; Kimura's two-parameter distance). Given that maritimensis and arcticus + laricorum appear to be reciprocally monophyletic clades with considerable genetic divergence (i.e., greater than that between other recognized pairs of sister-species within the S. araneus-arcticus group), we propose that S. maritimensis be recognized as a distinct species. The proportion of third-position transversion substitutions between S. arcticus and S. maritimensis suggests that these two species shared a common ancestor approximately 2.4 million years ago. |
format |
Article in Journal/Newspaper |
author |
Stewart, D.T. Perry, N. D. Fumagalli, L. |
author_facet |
Stewart, D.T. Perry, N. D. Fumagalli, L. |
author_sort |
Stewart, D.T. |
title |
The maritime shrew, Sorex maritimensis (Insectivora : Soricidae): a newly recognized Canadian endemic. |
title_short |
The maritime shrew, Sorex maritimensis (Insectivora : Soricidae): a newly recognized Canadian endemic. |
title_full |
The maritime shrew, Sorex maritimensis (Insectivora : Soricidae): a newly recognized Canadian endemic. |
title_fullStr |
The maritime shrew, Sorex maritimensis (Insectivora : Soricidae): a newly recognized Canadian endemic. |
title_full_unstemmed |
The maritime shrew, Sorex maritimensis (Insectivora : Soricidae): a newly recognized Canadian endemic. |
title_sort |
maritime shrew, sorex maritimensis (insectivora : soricidae): a newly recognized canadian endemic. |
publishDate |
2002 |
url |
https://serval.unil.ch/notice/serval:BIB_6FE5237C3CC4 https://doi.org/10.1139/Z01-207 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Canadian Journal of Zoology, vol. 80, no. 1, pp. 94-99 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1139/Z01-207 info:eu-repo/semantics/altIdentifier/pissn/0008-4301 https://serval.unil.ch/notice/serval:BIB_6FE5237C3CC4 doi:10.1139/Z01-207 |
op_doi |
https://doi.org/10.1139/Z01-207 |
container_title |
Canadian Journal of Zoology |
container_volume |
80 |
container_issue |
1 |
container_start_page |
94 |
op_container_end_page |
99 |
_version_ |
1790596595299909632 |