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ID 25973
本文ファイル
著者
Alam, Mohammad Shafiqul
Igawa, Takeshi
Khan, Md. Mukhlesur Rahman
Kuramoto, Mitsuru
Matsui, Masafumi
キーワード
Genetic divergence
Molecular phylogeny
Mitochondrial genes
Divergence time
Amphibia
Hoplobatrachus
Euphlyctis
Cryptic species
Bangladesh
NDC
生物科学・一般生物学
抄録(英)
To elucidate the species composition, genetic divergence, evolutionary relationships and divergence time of Hoplobatrachus and Euphlyctis frogs (subfamily Dicroglossinae, family Ranidae) in Bangladesh and other Asian countries, we analyzed the mitochondrial Cyt b, 12S and 16S rRNA genes of 252 specimens. Our phylogenetic analyses showed 13 major clades corresponding to several cryptic species as well as to nominal species in the two genera. The results suggested monophyly of Asian Hoplobatrachus species, but the position of African H. occipitalis was not clarified. Nucleotide divergence and phylogenetic data suggested the presence of allopatric cryptic species allied to E. hexadactylus in Sundarban, Bangladesh and several parapatric cryptic species in the Western Ghats, India. The presence of at least two allopatric cryptic species among diverged E. cyanophlyctis in Bangladesh, India and Sri Lanka was also suggested. In some cases, our estimated divergence times matched the paleogeological events of South and Southeast Asian regions that may have led to the divergence of Hoplobatrachus and Euphlyctis taxa. Especially, Land formation at Bangladesh (15-10 Ma) may have allowed the spread of these frog taxa to Southeast Asian areas, and the aridification of central India (5.1-1.6 Ma) might have affected the gene flow of widely distributed species. The present study revealed prior underestimation of the richness of the amphibian fauna in this region, indicating the possible occurrence of many cryptic species among these groups.
掲載誌名
Molecular Phylogenetics and Evolution
48巻
2号
開始ページ
515
終了ページ
527
出版年月日
2008-08
出版者
Academic Press Inc.
Elsevier Science
ISSN
1055-7903
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2008 Elsevier Inc.
関連情報URL
部局名
理学研究科