Evolution of nuchal glands, unusual defensive organs of Asian natricine snakes (Serpentes: Colubridae), inferred from a molecular phylogeny

doi:10.1002/ece3.4497

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	Evolution of nuchal glands, unusual defensive organs of Asian natricine snakes (Serpentes: Colubridae), inferred from a molecular phylogeny
	Takeuchi, Hirohiko 11; Savitzky, Alan H.10; Ding, Li 9; de Silva, Anslem 2; Das, Indraneil 1; Tao Thien Nguyen 7,8; Tsai, Tein-Shun 6; Jono, Teppei 9; Zhu, Guang-Xiang 5; Mahaulpatha, Dharshani 4
刊名	ECOLOGY AND EVOLUTION
	2018-10-01
卷号	8 期号:20 页码:10219-10232
关键词	Balanophis Macropisthodon molecular phylogenetics Natricinae nuchal glands Rhabdophis
ISSN号	2045-7758
DOI	10.1002/ece3.4497
产权排序	3
文献子类	Article
英文摘要	A large body of evidence indicates that evolutionary innovations of novel organs have facilitated the subsequent diversification of species. Investigation of the evolutionary history of such organs should provide important clues for understanding the basis for species diversification. An Asian natricine snake, Rhabdophis tigrinus, possesses a series of unusual organs, called nuchal glands, which contain cardiotonic steroid toxins known as bufadienolides. Rhabdophis tigrinus sequesters bufadienolides from its toad prey and stores them in the nuchal glands as a defensive mechanism. Among more than 3,500 species of snakes, only 17 Asian natricine species are known to possess nuchal glands or their homologues. These 17 species belong to three nominal genera, Balanophis, Macropisthodon, and Rhabdophis. In Macropisthodon and Rhabdophis, however, species without nuchal glands also exist. To infer the evolutionary history of the nuchal glands, we investigated the molecular phylogenetic relationships among Asian natricine species with and without nuchal glands, based on variations in partial sequences of Mt-CYB, Cmos, and RAG1 (total 2,767 bp). Results show that all species with nuchal glands belong to a single clade (NGC). Therefore, we infer that the common ancestor of this clade possessed nuchal glands with no independent origins of the glands within the members. Our results also imply that some species have secondarily lost the glands. Given the estimated divergence time of related species, the ancestor of the nuchal gland clade emerged 19.18 mya. Our study shows that nuchal glands are fruitful subjects for exploring the evolution of novel organs. In addition, our analysis indicates that reevaluation of the taxonomic status of the genera Balanophis and Macropisthodon is required. We propose to assign all species belonging to the NGC to the genus Rhabdophis, pending further study.
学科主题	Environment ; Ecology
URL标识	查看原文
WOS关键词	RHABDOPHIS-TIGRINUS ; SQUAMATA COLUBRIDAE ; MITOCHONDRIAL ; SEQUENCE ; DIFFERENTIATION ; PHYLOGEOGRAPHY ; SUPPORT ; GENES
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology
语种	英语
出版者	WILEY
WOS记录号	WOS:000449529800022
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/30139]
专题	食品安全与环境治理领域_中国科学院环境与应用微生物重点实验室
作者单位	1.Univ Malaysia Sarawak, Inst Biodivers & Environm Conservat, Sarawak, Malaysia; 2.Gampola, Sri Lanka; 3.Department of Zoology, Graduate School of Science, Kyoto University, Kyoto, Japan 4.Univ Sri Jayewardenepura, Nugegoda, Sri Lanka; 5.Sichuan Agr Univ, Coll Life Sci, Yaan, Peoples R China; 6.Natl Pingtung Univ Sci & Technol, Dept Biol Sci & Technol, Neipu Township, Taiwan; 7.Vietnam Acad Sci & Technol, Grad Univ Sci & Technol, Hanoi, Vietnam; 8.Vietnam Acad Sci & Technol, Vietnam Natl Museum Nat, Hanoi, Vietnam; 9.Chinese Acad Sci, Chengdu Inst Biol, Chengdu, Sichuan, Peoples R China; 10.Utah State Univ, Dept Biol, Logan, UT 84322 USA;
推荐引用方式 GB/T 7714	Takeuchi, Hirohiko,Savitzky, Alan H.,Ding, Li,et al. Evolution of nuchal glands, unusual defensive organs of Asian natricine snakes (Serpentes: Colubridae), inferred from a molecular phylogeny[J]. ECOLOGY AND EVOLUTION,2018,8(20):10219-10232.
APA	Takeuchi, Hirohiko.,Savitzky, Alan H..,Ding, Li.,de Silva, Anslem.,Das, Indraneil.,...&Mori, Akira.(2018).Evolution of nuchal glands, unusual defensive organs of Asian natricine snakes (Serpentes: Colubridae), inferred from a molecular phylogeny.ECOLOGY AND EVOLUTION,8(20),10219-10232.
MLA	Takeuchi, Hirohiko,et al."Evolution of nuchal glands, unusual defensive organs of Asian natricine snakes (Serpentes: Colubridae), inferred from a molecular phylogeny".ECOLOGY AND EVOLUTION 8.20(2018):10219-10232.