Diversification of the white-toothed shrews of the genus Crocidura (Insectivora: Soricidae) in East and Southeast Asia

Motokawa, Masaharu; Yu, Hon‐Tsen; Harada, Masashi

doi:10.3106/1348-6160(2005)30[s53:dotwso]2.0.co;2

Cited by 15 publications

(8 citation statements)

References 46 publications

(101 reference statements)

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“…Most studies involving protein, chromosomal, and recent molecular data suggest the evolutionary division of Crocidura into Afrotropical and Asian lineages (Maddalena 1990;Maddalena & Ruedi 1994;Ruedi 1998;Bannikova et al 2006;Dubey et al 2008;Lavrenchenko et al 2009); however, the monophyly of these clades is still insufficiently supported. Yet both karyological and molecular data strongly suggest that East Asian Crocidura comprise a mixture of southern and northern faunal elements (Motokawa et al 2000(Motokawa et al , 2005Dubey et al 2008) and their relationship with Afrotropical species is very complex due to several transcontinental faunal exchanges hypothesized between Eurasia and Africa (Dubey et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Mitochondrial diversity of the white-toothed shrews (Mammalia, Eulipotyphla, Crocidura) in Vietnam

Банникова

Abramov

Borisenko

et al. 2011

Zootaxa

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We explored the patterning of genetic diversity within white-toothed shrews of the genus Crocidura from 14 localities across Vietnam. An analysis of cytochrome oxidase c subunit I (COI) and cytochrome b (cytb) gene fragments from 185 specimens of white-toothed shrews of the genus Crocidura from 14 localities across Vietnam revealed six deeply divergent (p-distance for both COI and cytb >10%) lineages, corresponding to the morphological species C. sokolovi, C. zaitsevi, C. phuquocensis, С . indochinensis, C. tanakae and, C. phanluongi. Crocidura sokolovi was distinct from all other Vietnamese white-toothed shrews (~13% on average for both cytb and COI). In addition to demonstrating the genetic separation of previously described species, substantial cryptic genetic diversity was revealed. Crocidura zaitsevi and C. tanakae each included two subgroups that corresponded to geographically remote localities, while C. indochinensis contained two distinct subgroups that exhibited co-varying patterns of morphological and ecological differentiation, suggesting that the individuals from Sa Pa represent a separate species (provisionally named Crocidura sp. AB1). Mitochondrial data generated for the type specimens of C. phanluongi from Yok Don and Bu Gia Map supported the validity of the species while an additional specimen from Binh Chau, South Vietnam originally referred to C. phanluongi exhibited a deep genetic split (cytb: 8.4%; COI: 8.7%) from a neighbouring population in Yok Don. We propose that the specimen from Binh Chau also represents an undescribed species (provisionally named Crocidura sp. AB2). Our cytb data were then compared to the sequences of 28 species of Crocidura from Southeast Asia available in GenBank, suggesting that three more species occur in northern Vietnam, namely C. wuchihensis, C. attenuata and C. fuliginosa/C. dracula. The discovery of fairly deep genetic divergences among Vietnamese Crocidura illustrates that the understudied and largely undescribed diversity of white-toothed shrews in Southeast Asia requires deeper scrutiny. It also shows the useful insights of mitochondrial markers as to the taxonomic resolution of this enigmatic group of mammals.

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Section: Introductionmentioning

confidence: 99%

Mitochondrial diversity of the white-toothed shrews (Mammalia, Eulipotyphla, Crocidura) in Vietnam

Банникова

Abramov

Borisenko

et al. 2011

Zootaxa

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“…Shrews (Soricomorpha: Crocidura) have proven a useful clade for testing a number of biogeographic hypotheses in East Asia, as they are ubiquitous and diverse throughout the region (e.g. Ruedi et al, 1998;Motokawa et al, 2005;). However, the taxonomy of Crocidura remains complex and somewhat unresolved, as new species and island populations continue to be discovered (Ruedi, 1995;Lunde et al, 2004;Hutterer, 2007;Jenkins et al, 2007Jenkins et al, , 2009Abramov et al, 2008) and molecular evidence has revealed several cases where taxonomy does not fully account for evolutionary history, as inferred from DNA sequence data (Ohdachi et al, 2004;Dubey et al, 2008;.…”

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confidence: 99%

Colonization of the Philippines from Taiwan: a multi‐locus test of the biogeographic and phylogenetic relationships of isolated populations of shrews

Esselstyn

Oliveros

2010

Journal of Biogeography

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The Philippine archipelago represents a potential model system for understanding the effects of various geological, climatic and geographic variables on the diversification trajectories of lineages. Despite this potential, basic features of the evolutionary history of most regional clades, such as the number of times the archipelago was colonized and when and ABSTRACT Aim Colonization of the Philippines from Taiwan or neighbouring areas of the Asian mainland has been proposed as an important source of diversity for some plant and animal groups in the northern Philippines. Previous inferences, however, were based on taxonomic groupings, which sometimes fail to reflect phylogenetic history. Here, we test for colonization of the Philippines from the north in a group of shrews (Soricomorpha: Crocidura) using explicit inferences of evolutionary history.Location Southeast Asia.Methods We estimate the phylogenetic relationships of populations of shrews from Batan and Sabtang islands in the northern Philippines using DNA sequences from two mitochondrial genes and three nuclear loci. We employ topology tests to evaluate the possible relationships of these shrews to species from throughout Southeast Asia. ResultsWe find conclusive evidence that shrews from Batan and Sabtang are closely related to Crocidura tanakae from Taiwan and additional specimens from the Asian mainland. Bayesian and frequentist topology tests using alignments of individual loci strongly reject any notion that shrews from Batan and Sabtang are part of the main Philippine radiation of Crocidura, indicating that the northernmost Philippine islands were almost certainly colonized by shrews from Taiwan or mainland Asia.Main conclusions Our results provide the first compelling evidence for colonization of the Philippine archipelago by a terrestrial vertebrate via a northern route. Invasion of the northern Philippines by shrews, however, did not lead to further range expansion to more southerly parts of the Philippines. This study, combined with previous results, documents that Crocidura colonized the Philippines at least three times. However, only one of these invasions led to in situ speciation and ubiquity across the archipelago. Our findings are part of a growing body of literature suggesting that oceanic archipelagos are often colonized multiple times by groups of closely related species, and occasionally from multiple sources.

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“…The geographical distributions and morphological distinction of C. tanakae and C. attenuata were resolved based on a large number of specimens [10]. Compared with fewer studies in China, there are extensive studies of Crocidura in Southeast Asian countries and regions, such as in Vietnam [3,11], Malaya and Indonesia [12][13][14][15], Philippines [16,17] and Taiwan [17][18][19], Korea and Japan [20][21][22][23]. Although these previous studies did much to improve our understanding of the evolutionary relationships and taxonomy of Crocidura in Southeast Asian and regions, they rarely sampled species in China.…”

Section: Introductionmentioning

confidence: 99%

Multilocus phylogeny and cryptic diversity of white-toothed shrews (Mammalia, Eulipotyphla, Crocidura) in China

et al. 2020

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Background: Crocidura, the most speciose mammalian genus, occurs across much of Asia, Europe and Africa. The taxonomy of Chinese representatives has been studied primarily based on cursory morphological comparisons and their molecular phylogenetic analyses remain unexplored. In order to understand the phylogeny of this group in China, we estimated the first multilocus phylogeny and conducted species delimitation, including taxon sampling throughout their distribution range. Results: We obtained one mitochondrial gene (cytb) (~1, 134 bp) and three nuclear genes (ApoB, BRCA1, RAG1) (2 , 170 bp) for 132 samples from 57 localities. Molecular analyses identified at least 14 putative species that occur within two major well-supported groups in China. Polyphyletic C. wuchihensis appears to be composed of two putative species. Two subspecies, C. rapax rapax and C. rapax kurodai should be elevated to full species status. A phylogenetic tree based on mitochondrial gene from Asian Crocidura species showed that the C. rapax rapax is embedded within C. attenuata, making the latter a paraphyletic group. Three strongly supported undescribed species (C. sp.1, C. sp.2 and C. sp.3) are revealed from Zada County of Tibet (Western China), Hongjiang County of Hunan Province (Central China) and Dongyang County of Zhejiang Province (Eastern China), Motuo County of Tibet, respectively. The divergence time estimation suggested that China's Crocidura species began to diversify during the late Pliocene (3.66 Ma) and the Early Pleistocene (2.29 Ma), followed by a series of diversifications through the Pleistocene. Conclusions: The cryptic diversity found in this study indicated that the number of species is strongly underestimated under the current taxonomy. We propose that the three undescribed species should be evaluated using extensive taxon sampling and comprehensive morphological and morphometric approaches. Climate change since the late Pliocene and the uplift of the Qinghai-Tibet Plateau may result in the diversification and speciation of China's Crocidura species. In short, the underestimated diversity underlines the need for a taxonomic revision of Chinese Crocidura species.

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Diversification of the white-toothed shrews of the genus Crocidura (Insectivora: Soricidae) in East and Southeast Asia

Cited by 15 publications

References 46 publications

Mitochondrial diversity of the white-toothed shrews (Mammalia, Eulipotyphla, Crocidura) in Vietnam

Mitochondrial diversity of the white-toothed shrews (Mammalia, Eulipotyphla, Crocidura) in Vietnam

Colonization of the Philippines from Taiwan: a multi‐locus test of the biogeographic and phylogenetic relationships of isolated populations of shrews

Multilocus phylogeny and cryptic diversity of white-toothed shrews (Mammalia, Eulipotyphla, Crocidura) in China

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