CaltechAUTHORS
Published June 16, 2006 | Version Supplemental Material
Journal Article Open

Phosphatized Polar Lobe-Forming Embryos from the Precambrian of Southwest China

Creators

  • 1. ROR icon Nanjing University
  • 2. ROR icon University of Southern California
  • 3. ROR icon California Institute of Technology
  • 4. ROR icon University of Wisconsin–Milwaukee
  • 5. ROR icon National Tsing Hua University
  • 6. ROR icon Institute of High Energy Physics
  • 7. ROR icon Institute of Physics, Academia Sinica
  • 8. ROR icon European Synchrotron Radiation Facility

Abstract

In developing embryos of some extant spiralian animals, polar lobe formation is one of the symmetry-breaking mechanisms for segregation of maternal cytoplasmic substances to certain blastomeres and not others. Polar lobe formation leads to unique early cleavage morphologies that include trilobed, J-shaped, and five-lobed structures. Fossil embryos similar to modern lobeforming embryos are recognized from the Precambrian Doushantuo Formation phosphates, Weng'an, Guizhou Province, China. These embryos are abundant and form a developmental sequence comparable to different developing stages observed in lobe-forming embryos of extant spiralians. These data imply that lobe formation is an evolutionarily ancient process of embryonic specification.

Additional Information

© 2006 American Association for the Advancement of Science. 8 February 2006; Accepted 27 April 2006. Supported by Chinese Academy of Science grant KZCX3-SW-141; National Science Foundation of China grants 42432006, 40302004, 10490190, 60172042, and 10490194; 111 Project and 985-2 Project of Nanjing University, LPS of Nanjing Institute of Geology & Paleontology, NASA/Ames grant NAG2-1541, and an NSC grant. We thank the European Synchrotron Radiation Facility, Taiwan NSRRC, and Beijing Synchrotron Radiation Facility and Photon Factory for provision of synchrotron radiation facilities.

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Supplemental Material - ChenJ.SOM.pdf

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Additional details

Identifiers

Eprint ID
52046
DOI
10.1126/science.1125964
Resolver ID
CaltechAUTHORS:20141121-115203718

Related works

Describes
10.1126/science.1125964 (DOI)

Funding

Chinese Academy of Sciences
KZCX3-SW-141
National Science Foundation of China
42432006
National Science Foundation of China
40302004
National Science Foundation of China
10490190
National Science Foundation of China
60172042
National Science Foundation of China
10490194
111 Project
Nanjing University
985-2
Nanjing Institute of Geology & Paleontology
NASA
NAG2-1541
National Science Council (Taipei)

Dates

Created
2014-11-21
Created from EPrint's datestamp field
Updated
2021-11-10
Created from EPrint's last_modified field