Navigation Links
Oldest fossils of large seaweeds, worm-like animals tell story of ancient oxygen
Date:2/23/2011

Almost 600 million years ago, before the rapid evolution of life forms known as the Cambrian explosion, a community of seaweeds and worm-like animals lived in a quiet deep-water niche near what is now Lantian, a small village in south China.

Then they simply died, leaving some 3,000 nearly pristine fossils preserved between beds of black shale deposited in oxygen-free and unbreathable waters.

Scientists from the Chinese Academy of Sciences, Virginia Tech in the United States and Northwest University in Xi'an, China report the discovery of the fossils in the Feb. 17 issue of the journal Nature.

In addition to ancient versions of algae and worms, the Lantian biota--named for its location--included macrofossils with complex and puzzling structures.

In all, scientists have identified some 15 species at the site.

The fossils suggest that structural diversification of macroscopic eukaryotes--the earliest versions of organisms with complex cell structures--may have occurred only tens of millions of years after the Snowball Earth event that ended 635 million years ago.

Snowball Earth proposes that the Earth's surface became almost, or completely, frozen at least once during the planet's history.

The presence of macroscopic eukaryotes in the highly organic-rich black shale suggests that, despite the overall oxygen-free conditions, brief oxygenation of the oceans did come and go, according to H. Richard Lane, program director in the National Science Foundation (NSF)'s Division of Earth Sciences, which funded the research.

"So there are two questions," says Shuhai Xiao, a geobiologist at Virginia Tech. "Why did this community evolve when, and where, it did?

"It is clearly different in terms of the number of species compared to biota preserved in older rocks. There are more species here, and they are more complex and larger than what evolved before."

The rocks were formed s
'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Researchers uncover worlds oldest fossil impression of a flying insect
2. 4,000-year-old coral beds among worlds oldest living things, prof says
3. Kent State University Professor C. Owen Lovejoy helps unveil oldest hominid skeleton
4. Ardi displaces Lucy as oldest hominid skeleton
5. Dinosaur-chewing mammals leave behind oldest known tooth marks
6. Oldest Earth mantle reservoir discovered
7. Scientists discover oldest evidence of human stone tool use and meat-eating
8. UNH researcher helps identify key reproductive hormone in oldest vertebrate
9. Oldest evidence of dinosaurs found in Polish footprints
10. VTT to study one of worlds oldest beers
11. Oldest species of a marine mollusc discovered
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Oldest fossils of large seaweeds, worm-like animals tell story of ancient oxygen
(Date:10/29/2014)... as ,facultative, form part—together with other cells—of tissues and ... from the others. However, they have a very special ... cells again. This phenomenon is something that happens in ... tissue growth, thus allowing the regeneration of the organ ... the underlying mechanism that allows these cells to retain ...
(Date:10/29/2014)... organisms in the living world compete with members ... in how much they invest into their competitive ... to get access to high-quality resources, while others ... of the lower-quality resources that are left over ... animal and human societies seems to fluctuate considerably ...
(Date:10/29/2014)... of kidney cancer patients in Europe sheds light on ... an apparent link between exposure to aristolochic acid and ... research, by an international team led by scientists from ... Montreal, underscores the importance of investigating possible sources of ... of the Aristolochia genus, also has been suspected of ...
Breaking Biology News(10 mins):A mechanism that allows a differentiated cell to reactivate as a stem cell revealed 2Evolution of competitiveness 2Evolution of competitiveness 3Study sheds light on genetic architecture of kidney cancer 2Study sheds light on genetic architecture of kidney cancer 3
... northern Australia, finding black holes in space, to making ... work of some of its scientists and staff today ... awarded each year to staff of the CSIRO who ... 1985, the CSIRO Medals have been presented to a ...
... study published in Science and reviewed by F1000 ... brains have the amazing ability to be energy efficient. ... potentials, by controlling the flow of positive sodium and potassium ... equilibrium after an action potential requires energy. The ...
... 2009 Areas of turf-forming species created and maintained ... i.e. "urban grasslands" are an extremely common, but poorly ... grasslands in the U.S. and many receive high rates ... lakes, and estuaries and emissions of greenhouse gases such ...
Cached Biology News:CSIRO medal winners 2CSIRO medal winners 3Nitrogen mysteries in urban grasslands 2Nitrogen mysteries in urban grasslands 3
(Date:10/30/2014)... October 30, 2014 SoundConnect ... provider, offers Office 365 end users the key ... complete phone system by adding voice enablement and ... includes Lync Online, a communication tool that includes ... With hosted voice, O365 becomes a comprehensive unified ...
(Date:10/30/2014)... (PRWEB) October 30, 2014 Whitehouse Laboratories ... its ICH Stability Testing and Package Test Capacity. Responding ... centers on a dramatic increase in environmental chamber storage ... stability, storage and aging samples to be securely held ... this major capital expenditure has already taken place with ...
(Date:10/30/2014)... -- A new report, commissioned by BioCrossroads and conducted ... look at Indiana,s capital market ... different time frames: 1993 to 2002 and 2003 to ... for investment growth.  The Life Science Innovation Capital ... in innovation dollars as well as an increase in ...
(Date:10/27/2014)... North Carolina (PRWEB) October 27, 2014 ... invited earlier this month to sit down with Bryan Hamilton, ... from RPG Solutions to discuss talent in the Research Triangle ... topics that were highlighted at the roundtable include ... the Triangle, the significance of work/life balance and the unique ...
Breaking Biology Technology:SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 2SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 3Whitehouse Labs Announces Major Capital Investment in Stability and Storage Testing Capacity 2Whitehouse Labs Announces Major Capital Investment in Stability and Storage Testing Capacity 3New report shows Indiana's gains in life sciences innovation capital outpace the nation 2New report shows Indiana's gains in life sciences innovation capital outpace the nation 3New report shows Indiana's gains in life sciences innovation capital outpace the nation 4New report shows Indiana's gains in life sciences innovation capital outpace the nation 5Personify's Ryan Carfley Talks Recruiting with Triangle Business Journal, RPG Solutions 2Personify's Ryan Carfley Talks Recruiting with Triangle Business Journal, RPG Solutions 3
... Forest Laboratories, Inc.,(NYSE: FRX ) and H. ... Court,of Appeals for the Federal Circuit has affirmed a ... the District of Delaware which determined that,the U.S. patent ... upheld the injunction preventing Ivax/Teva,s proposed generic,product launch, thereby ...
... a Proven Leader at Driving Growth, SAN FRANCISCO, ... equity firm that focuses on investments in selected segments,of ... software, today announced the appointment of Michael L. Hurt,to ... Mr. Hurt, CEO,of Altra Industrial Motion (Nasdaq: AIMC ...
... Diagnostic Systems Installs CTLM(R) in Tianjin, China, ... Inc., (OTC Bulletin Board: IMDS) a pioneer in ... CT Laser Mammography,(CTLM(R)) system at the Tianjin Medical ... center in China. (Logo: http://www.newscom.com/cgi-bin/prnh/20040412/IMDSLOGO ...
Cached Biology Technology:Forest Laboratories Announces Federal Appeals Court Upholds Lexapro(R) Patent Decision 2Genstar Names Michael Hurt to Its Strategic Advisory Board 2Largest Asian Cancer Hospital to Evaluate New CT Laser Breast Imaging System 2Largest Asian Cancer Hospital to Evaluate New CT Laser Breast Imaging System 3
... whose sequence corresponds to residues 1-18 from rat rab 3D. ... - A - S - A - S - E - ... - D - A - A - D - Q - ... control experiments with the polyclonal antibody that reacts with this product ...
... enables complete conversion of unmethylated cytosines ... hours. The highly sensitive method utilizes ... and a spin-column-based purification and desulfonation ... results for all downstream applications. The ...
... RNA OligoMix or individual RNA sequences from high ... custom small RNAs from LC Sciences. These products ... to millions) of DESIGNED sequences delivered in a ... each containing a single verified RNA sequence. This ...
... Hollandes is a fixative useful for routine ... It is stable and will decalcify small ... Hollande's can be stained successfully with most ... solution stabilizes red blood cell membranes and ...
Biology Products: