A new Eocene catostomid (Teleostei: Cypriniformes) from northeastern China and early divergence of Catostomidae

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	A new Eocene catostomid (Teleostei: Cypriniformes) from northeastern China and early divergence of Catostomidae
	Liu Juan 1,2; Chang Mee-mann 1
	2009-02-01
发表期刊	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
卷号	52 期号:2 页码:189-202
文章类型	Article
摘要	A new Eocene catostomid genus and species, Plesiomyxocyprinus arratiae, is described from Huadian, Jilin Province, northeastern China. The materials include a nearly complete skeleton, dozens of pharyngeal bones with teeth, and a number of disarticulated bones. The new articulated specimen is large-sized and deep-bodied, with an estimated standard length of ca. 300 mm and body depth of 156 mm or about half of its standard length. The assignment of the fish to the Catostomidae is based on its falciform pharyngeal bone with one row of numerous (more than 50) compressed teeth, and the bone is much smaller than in cyprinids, especially given the size of the fish. The new fish distinguishes itself from all known catostomids (both extinct and extant) in its long anal fin with four unbranched and 17-18 branched rays, and its extremely short caudal peduncle that is only about one fourth of its depth. Plesiomyxocyprinus arratiae resembles the Eocene-Oligocene transpacific-distributed Amyzon in many general skeletal characters. However, it shows a few characters uniquely shared with the Recent catostomid Myxocyprinus asiaticus. Those include a very long dorsal fin with about 50 branched fin rays, the end of dorsal fin rays being close to the caudal fin base, and anal rays stretching posteriorly beyond the base of caudal fin. It is the first fossil catostomid that shows a close relationship to the endemic Myxocyprinus now living in the Yangtze River and Minjiang River, China. The discovery of Plesiomyxocyprinus arratiae, along with two previously described possible catostomid genera Jianghanichthys and Vasnetzovia, may indicate that the divergence of the Catostomidae started much earlier, in the middle Eocene or earlier, on the western side of the Pacific than on its eastern side.
关键词	a New Catostomid Genus Eocene Northeastern China Early Divergence
WOS标题词	Science & Technology ; Physical Sciences
关键词[WOS]	FISHES ; MITOCHONDRIAL ; PHYLOGENY ; SEQUENCES
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000262684300005
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/1849
专题	古低等脊椎动物研究室
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Evolutionary Systemat Vertebrates, Beijing 100044, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu Juan,Chang Mee-mann. A new Eocene catostomid (Teleostei: Cypriniformes) from northeastern China and early divergence of Catostomidae[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2009,52(2):189-202.
APA	Liu Juan,&Chang Mee-mann.(2009).A new Eocene catostomid (Teleostei: Cypriniformes) from northeastern China and early divergence of Catostomidae.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,52(2),189-202.
MLA	Liu Juan,et al."A new Eocene catostomid (Teleostei: Cypriniformes) from northeastern China and early divergence of Catostomidae".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 52.2(2009):189-202.