MIDDLE CAMBRIAN ARTHROPOD EMBRYOS WITH BLASTOMERES

被引：66

作者：

ZHANG, XG

PRATT, BR

机构：

[1] Department of Geological Sciences, University of Saskatchewan, Saskatoon

来源：

SCIENCE | 1994年 / 266卷 / 5185期

关键词：

D O I：

10.1126/science.266.5185.637

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：

A phosphatized Middle Cambrian (similar to 510 million years ago) fauna from Duyun, southern China, has yielded fossil embryos that may be of arthropod affinity and could belong to the co-occurring eodiscid trilobite Pagetia sp. The shell was most likely flexible and possessed at least two thin layers. Four embryos reveal blastomeres, and two embryonic stages are represented. These embryos demonstrate that the basic paradigm for the growth of the invertebrate embryo has not changed in more than half a billion years.

引用

页码：637 / 639

页数：3

共 25 条

[1] KONSERVAT-LAGERSTATTEN - CAUSE AND CLASSIFICATION [J].