The histology and affinities of sinacanthid fishes: primitive gnathostomes from the Silurian of China

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	The histology and affinities of sinacanthid fishes: primitive gnathostomes from the Silurian of China
	Sansom, IJ; Wang, NZ; Smith, M; [email protected]
	2005
发表期刊	ZOOL J LINN SOC-LOND
ISSN	0024-4082
卷号	144 期号:3 页码:379-386
摘要	On the basis of well preserved specimens from the Lower Silurian of the Tarim Basin, Xinjiang Uygur Autonomous Region and Shiqian County, Guizhou Province, People's Republic of China we describe in detail the histological structure of sinacanthid spines, the only known remains of a group of fishes common in Silurian strata from China. The sinacanthids have previously been assigned either to the acanthodians or to the chondrichthyans. The spine structure is composed of an outer layer of atubular dentine and an inner layer of globular calcified cartilage, and the nature and distribution of these tissues indicates that the spines were formed as a result of interaction between the endoskeleton and dermoskeleton. The tissue distribution and style of growth described herein places the sinacanthids crownwards of the placoderms, and possibly within the total group Chondrichthyes. However, before they can be firmly placed within a phylogenetic scheme, further evidence is required both on the general anatomy of sinacanthids and on the nature of chondrichthyan apomorphies. (C) 2005 The Linnean Society of London.
关键词	Sharks Chondrichthyan Ordovician Period Fauna
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文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/5075
专题	中科院古脊椎所（2000年以后）
通讯作者	[email protected]
推荐引用方式 GB/T 7714	Sansom, IJ,Wang, NZ,Smith, M,et al. The histology and affinities of sinacanthid fishes: primitive gnathostomes from the Silurian of China[J]. ZOOL J LINN SOC-LOND,2005,144(3):379-386.
APA	Sansom, IJ,Wang, NZ,Smith, M,[email protected].(2005).The histology and affinities of sinacanthid fishes: primitive gnathostomes from the Silurian of China.ZOOL J LINN SOC-LOND,144(3),379-386.
MLA	Sansom, IJ,et al."The histology and affinities of sinacanthid fishes: primitive gnathostomes from the Silurian of China".ZOOL J LINN SOC-LOND 144.3(2005):379-386.

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