Discovery of fossil lamprey larva from the Lower Cretaceous reveals its three-phased life cycle

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	Discovery of fossil lamprey larva from the Lower Cretaceous reveals its three-phased life cycle
	Chang, Mee-mann 1,2; Wu, Feixiang 1; Miao, Desui 3; Zhang, Jiangyong 1; Chang, MM (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China.
	2014-10-28
发表期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN	0027-8424
卷号	111 期号:43 页码:15486-15490
文章类型	Article
摘要	Lampreys are one of the two surviving jawless vertebrate groups and one of a few vertebrate groups with the best exemplified metamorphosis during their life cycle, which consists of a long-lasting larval stage, a peculiar metamorphosis, and a relatively short adulthood with a markedly different anatomy. Although the fossil records have revealed that many general features of extant lamprey adults were already formed by the Late Devonian (ca. 360 Ma), little is known about the life cycle of the fossil lampreys because of the lack of fossilized lamprey larvae or transformers. Here we report the first to our knowledge discovery of exceptionally preserved premetamorphic and metamorphosing larvae of the fossil lamprey Mesomyzon mengae from the Lower Cretaceous of Inner Mongolia, China. These fossil ammocoetes look surprisingly modern in having an eel-like body with tiny eyes, oral hood and lower lip, anteriorly positioned branchial region, and a continuous dorsal skin fin fold and in sharing a similar feeding habit, as judged from the detritus left in the gut. In contrast, the larger metamorphosing individuals have slightly enlarged eyes relative to large otic capsules, thickened oral hood or pointed snout, and discernable radials but still anteriorly extended branchial area and lack a suctorial oral disk, which characterize the early stages of the metamorphosis of extant lampreys. Our discovery not only documents the larval conditions of fossil lampreys but also indicates the three-phased life cycle in lampreys emerged essentially in their present mode no later than the Early Cretaceous.
关键词	Fossil Lamprey Larva Lower Cretaceous Three-phased Life Cycle
WOS标题词	Science & Technology
关键词[WOS]	METAMORPHOSIS ; EVOLUTION ; VERTEBRATES ; ORIGINS
收录类别	SCI
语种	英语
项目资助者	National Basic Research Program of China [2012CB821900]; Asian-Swedish Research Partnership Program of the Swedish Research Council
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000343729500059
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/5105
专题	古低等脊椎动物研究室
通讯作者	Chang, MM (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 2.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 3.Univ Kansas, Biodivers Inst, Lawrence, KS 66045 USA
推荐引用方式 GB/T 7714	Chang, Mee-mann,Wu, Feixiang,Miao, Desui,et al. Discovery of fossil lamprey larva from the Lower Cretaceous reveals its three-phased life cycle[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2014,111(43):15486-15490.
APA	Chang, Mee-mann,Wu, Feixiang,Miao, Desui,Zhang, Jiangyong,&Chang, MM .(2014).Discovery of fossil lamprey larva from the Lower Cretaceous reveals its three-phased life cycle.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,111(43),15486-15490.
MLA	Chang, Mee-mann,et al."Discovery of fossil lamprey larva from the Lower Cretaceous reveals its three-phased life cycle".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 111.43(2014):15486-15490.

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