Spines and tissues of ancient sharks

被引：37

作者：

Coates, MI

Sequeira, SEK

Sansom, IJ

Smith, MM

机构：

[1] UCL, Dept Biol, London WC1E 6BT, England

[2] Univ Birmingham, Sch Earth Sci, Birmingham B15 2TT, W Midlands, England

[3] United Med & Dent Sch Guys & St Thomas Hosp, Sch Dent, Dept Craniofacial Dev, London SE1 9RT, England

来源：

NATURE | 1998年 / 396卷 / 6713期

关键词：

D O I：

10.1038/25467

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The ‘spine-brush complex’1 of the extinct, mid-Palaeozoic primitive chondrichthyan shark Stethacanthus is one of the strangest vertebrate appendages known. Its structure has never been defined, but here we reveal that the ‘brush’ is actually an enlarged, specialized extension of the fin baseplate (basal cartilage2). It consists of an unusual type of globular calcified cartilage, a tissue that is often associated with pre-jawed primitive vertebrates3.

引用

页码：729 / 730

页数：2

共 12 条

[1]

[Anonymous], 1996, EARLY VERTEBRATES, DOI DOI 10.1111/J.1502-3931.1996.TB01869.X

[2]

LUND R, 1974, Annals of Carnegie Museum, V45, P161

[3] FINSPINE MORPHOGENESIS IN SQUALID AND HETERODONTID SHARKS [J].