... and molluscan embryogenesis

被引：37

作者：

Israelsson, O ^{[1
]}

机构：

[1] UNIV STOCKHOLM,DEPT ZOOL,S-10691 STOCKHOLM,SWEDEN

来源：

NATURE | 1997年 / 390卷 / 6655期

关键词：

D O I：

10.1038/36246

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：

Xenoturbella bocki Westblad1 is a strange animal — a 2-cm-long, slowly moving ciliated bag with no anus and no organs except for a position-sensing statocyst containing flagellated statoconia2. Despite the animal's peculiarities, it has been neglected by most textbooks. I now report a study of oogenesis in X. bocki which, together with the nucleotide data of Norén and Jondelius3, contradicts earlier hypotheses as to the phylogeny of the animal and instead suggests a molluscan relationship close to or within the protobranch bivalves.

引用

页码：32 / 32

页数：1

共 13 条

[1] COMPARATIVE MORPHOLOGY OF STATOCYSTS IN THE PLATYHELMINTHES AND THE XENOTURBELLIDA [J].