Taxonomic study of the water shrewsChimarrogale himalayica andC. platycephala

Motokawa, Masaharu; Harada, Masashi; Apin, Ludi; Yasuma, Shigeki; Yuan, Sou-Li; Lin, Liang‐Kong

doi:10.1007/bf03192673

Cited by 8 publications

(11 citation statements)

References 17 publications

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“…Because the larger E. caudatus is separated from these three subspecies as a distinct species in this study, the three recognized subspecies become subspecies of E. sacratus following the nomenclatural priority rule, and the Nepalese subspecies should be E. sacratus soluensis. Therefore, This study This study This study Motokawa et al 1998Motokawa et al 1998Obara and Tada 1985Obara et al 1996;Motokawa et al 2006Motokawa et al 2006Fredga and Levan 1969Rimsa et al 1978;Ivanitskaya and Malygin 1985;Graphodatsky et al 1993;Zima et al 1998Meylan 1966Jiménez et al 1984;Zima et al 1998Sokolov and Tembotov 1989Graphodatsky et al 1993Motokawa et al 2004Harada and Takada 1985Motokawa et al 2004 we propose a revised species systematics of Episoriculus caudatus sensu Motokawa and Lin (2005) has not yet been determined; a more comprehensive systematic study of the genus Episoriculus should be conducted.…”

Section: Discussionmentioning

confidence: 80%

“…Their karyotypes differed and had larger 2n and FN values than other species in the tribe Nectogalini (Table 1; Meylan 1966;Fredga & Levan 1969;Rimsa et al 1978;Jiménez et al 1984;Harada & Takada 1985;Ivanitskaya & Malygin 1985;Obara & Tada 1985;Sokolov & Tembotov 1989;Graphodatsky et al 1993;Obara et al 1996;Zima et al 1998;Motokawa et al 1998Motokawa et al , 2004Motokawa et al , 2006. Episoriculus fumidus from Taiwan also has larger 2n and FN values (2n = 64, FN = 116; Motokawa et al 1998), but Chodsigoa sodalis from Taiwan has lower 2n and FN values (2n = 44, FN = 88; Motokawa et al 1998).…”

Section: Discussionmentioning

confidence: 99%

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Karyotypes of three shrew species (Soriculus nigrescens, Episoriculus caudatus and Episoriculus sacratus) from Nepal

Motokawa

Harada

Mekada

et al. 2008

Integrative Zoology

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The karyotypes of three shrew species (Mammalia, Soricomorpha, Soricidae) from Nepal were examined for the first time. Based on the karyotypes and overall differences in skull size, the current Episoriculus caudatus appeared to include two distinct species: the larger E. caudatus and the smaller Episoriculus sacratus. Episoriculus sacratus has three subspecies, E. s. soluensis in Nepal and Sikkim, E. s. umbrinus in Assam, Myanmar and the Yunnan Province of China, and E. s. sacratus in the Sichuan Province of China. Soriculus nigrescens had a diploid chromosome number (2n) and fundamental number (FN), including two X chromosomes, of 64 and 92, respectively, consisting of 11 metacentric or submetacentric, two subtelocentric and 18 acrocentric pairs of autosomes, a metacentric X and an acrocentric Y chromosome. Episoriculus sacratus soluensis had 2n = 74 and FN = 126, consisting of 12 metacentric or submetacentric, 13 subtelocentric and 11 acrocentric pairs of autosomes, a submetacentric X and an acrocentric Y chromosome. Episoriculus caudatus had 2n = 60 and FN = 118, consisting of 19 metacentric or submetacentric, nine subtelocentric and one acrocentric pair of autosomes, a subtelocentric X and an acrocentric Y chromosome. The karyotypes of these three species are characterized by their large 2n and FN values compared with other Soricidae.

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Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Karyotypes of three shrew species (Soriculus nigrescens, Episoriculus caudatus and Episoriculus sacratus) from Nepal

Motokawa

Harada

Mekada

et al. 2008

Integrative Zoology

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“…This result supports the findings of Ohdachi et al [40], who investigated the phylogenetic relationships of Chimarrogale based on samples from Japan ( C. platycephala ) and Taiwan (identified as C. himalayica in their manuscript). Because the phylogenetic position and taxonomic status of C. platycephala of Japan are agreed upon in most studies [1,3,5], Ohdachi et al [40] proposed that either species status or subspecies status, under C. platycephala , be applied to the Chimarrogale of Taiwan. However, their analyses did not include the original sampling locality of C .…”

Section: Discussionmentioning

confidence: 99%

“…Previous classifications of this genus have been based on external morphological and cranial characters and have been in doubt for several years (see Motokawa et al [5] for the details). Though Motokawa et al [5] confirmed the valid species status of C. platycephala in Japan, they only partially investigated the phylogenetic relationships between Taiwanese and Japanese water shrews. Thus, the phylogenetic relationships and biogeographic history of Asiatic water shrews were left unresolved.…”

Section: Introductionmentioning

confidence: 99%

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A Mitochondrial Phylogeny and Biogeographical Scenario for Asiatic Water Shrews of the Genus Chimarrogale: Implications for Taxonomy and Low-Latitude Migration Routes

Yuan

Jiang

et al. 2013

PLoS ONE

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The six species and three subspecies in the genus Chimarrogale (Soricomorpha: Soricidae) are commonly referred to as Asiatic water shrews. The Chimarrogale are the most widely distributed group of Nectogaline shrews, extending throughout the Oriental region and Japan. Because of the limited numbers of specimens available for study, the phylogenetic relationships and biogeographical history of this genus have not been comprehensively discussed. We used mitochondrial cytochrome b gene sequences to estimate phylogenetic relationships and divergence times among four Chimarrogale species, including all three subspecies of Chimarrogale himalayica. We also conducted a species delimitation analysis and tested two alternative migration scenarios in Asia through species distribution modeling and a reconstruction of the ancestral distribution. Here, we present the first proposed hypothesis regarding the Asiatic water shrew phylogeny and reveal ten putative species within the four recognized species. Distinct phylogenetic statuses of Chimarrogale phaeura, Chimarrogale platycephala, and Chimarrogale styani were confirmed. Chimarrogale himalayica was strongly supported as paraphyletic. We suggest that three subspecies of Chimarrogale himalayica should be reconsidered as distinct species. However, these suggestions must be considered with caution because only a single locus of a mtDNA gene was used. Four additional putative species, possibly distributed in central southwestern China and Taiwan, are currently undescribed; therefore, comprehensive morphological analyses are warranted to test their taxonomic statuses. The estimated molecular divergence times indicated that rapid speciation occurred during the early Pliocene, and current distribution patterns may have been affected by global cooling during the Pliocene/Pleistocene boundary. Reconstruction of the ancestral distribution and species distribution modeling for Asiatic water shrews revealed a low-latitude migration route over which ancestral Chimarrogale migrated from Europe via Central Asia to their current distribution. Our results demonstrated that Asiatic water shrews could have evolved throughout the low-latitude migration route from Europe to East and Southeast Asia.

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Checklist of South Asian Mammals

Srinivasulu

2012

South Asian Mammals

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Taxonomic study of the water shrewsChimarrogale himalayica andC. platycephala

Cited by 8 publications

References 17 publications

Karyotypes of three shrew species (Soriculus nigrescens, Episoriculus caudatus and Episoriculus sacratus) from Nepal

Karyotypes of three shrew species (Soriculus nigrescens, Episoriculus caudatus and Episoriculus sacratus) from Nepal

A Mitochondrial Phylogeny and Biogeographical Scenario for Asiatic Water Shrews of the Genus Chimarrogale: Implications for Taxonomy and Low-Latitude Migration Routes

Checklist of South Asian Mammals

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