On the evolution and histology of some Cambrian protoconodonts, paraconodonts and primitive euconodonts

doi:10.1360/03yd0535

	On the evolution and histology of some Cambrian protoconodonts, paraconodonts and primitive euconodonts
	Dong, XP
	2004-07-01
发表期刊	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
ISSN	1006-9313
卷号	47 期号:7 页码:577-584
摘要	Previous reports on the morphological evolution of protoconodonts and paraconodonts are reviewed. The evolutionary trends exhibited by species of the protoconodont genus Gapparodus and the paraconodont genus Westergaadodina are discussed. Based on the present study on histology, genus Paibiconus is protoconodont, while genus Yongshunella is paraconodont (fig. 1 (a)). However, the nature of Huayuanodontus has not been fully understood so far. Recently, the transitional form New Gen. Sensu Miller, 1980 of late Late Cambrian has been found in Hunan Province, South China. It is considered as the Sister-Group of Proconodontus. Moreover, another kind of transitional form of middle Late Cambrian and late Late Cambrian between Prooneotodus rotundatus and Proconodontus, which looks like Prooneotodus rotundatus in gross morphology, but has anterior and posterior costae, has also been found in Hunan, South China. This kind of transitional form is believed to be probably the real intermediate link between Prooneotodus rotundatus and Proconodontus, and Prooneotodus rotundatus is most probably the ancestor of Proconodontus. The two transitional forms noted above are all euconodonts by the study of their histology. Unlike the euconodonts of Post-Cambrian, the evolutionary relationships among the species of protoconodonts, paraconodonts and the primitive euconodonts could not be made clear without the histological study on them.
关键词	protoconodonts paraconodonts evolution histology Cambrian
DOI	10.1360/03yd0535
语种	英语
关键词[WOS]	MIDDLE ; CONODONTS ; HUNAN
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000223570200001
出版者	SCIENCE CHINA PRESS
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/1045
专题	中国科学院南京地质古生物研究所
通讯作者	Dong, XP
作者单位	1.Peking Univ, Dept Geol, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Dong, XP. On the evolution and histology of some Cambrian protoconodonts, paraconodonts and primitive euconodonts[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2004,47(7):577-584.
APA	Dong, XP.(2004).On the evolution and histology of some Cambrian protoconodonts, paraconodonts and primitive euconodonts.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,47(7),577-584.
MLA	Dong, XP."On the evolution and histology of some Cambrian protoconodonts, paraconodonts and primitive euconodonts".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 47.7(2004):577-584.