Navigation Links
Unexpected exoskeleton remnants found in Paleozoic fossils
Date:2/7/2011

Washington, D.C.Surprising new research shows that, contrary to conventional belief, remains of chitin-protein complexstructural materials containing protein and polysaccharideare present in abundance in fossils of arthropods from the Paleozoic era. Previously the oldest molecular signature of chitin-protein complex was discovered in 25 million year old Cenozoic fossils and remnants of structural protein have also been discovered in 80 million-year-old Mesozoic fossils. Carnegie's George Cody and an international team of scientists discovered relicts of protein-chitin complex in fossils of arthropods from the Paleozoic era. Their findings, published online by Geology, could have major implications for our understanding of the organic fossil record.

Among other common features, arthropods have exoskeletons, or cuticles. The outer portions of these cuticles are made up of a composite of chitin fibers, which are embedded in a matrix of protein. It is well known that chitin and structural protein are easily degraded by microorganisms and it has long been believed that chitin and structural proteins would not be present in fossils of moderate age, let alone in fossils dating back to the early Paleozoic.

Cody and his team studied fossil remains of a 310-million-year-old scorpion cuticle from northern Illinois and a 417-million-year-old eurypteridan extinct scorpion-like arthropod, possibly related to horseshoe crabsfrom Ontario, Canada. Using sophisticated analytical instrument at the Advanced Light Source facility, the research team measured the absorption spectra of low-energy X-rays by carbon, nitrogen, and oxygen in the fossils. These measurements were taken at a resolution on the order of 25 nanometers. The researchers showed that the majority of carbon, nitrogen and oxygen found in these fossils from the Paleozoic era were derived from a protein-chitin complex. Not surprisingly, the protein-chitin material was somewhat degraded, either by chemical processes or partial bacterial degradation.

Cody speculates that the vestigial protein-chitin complex may play a critical role in organic fossil preservation by providing a substrate protected from total degradation by a coating waxy substances that protect the arthropods from desiccation.


'/>"/>

Contact: George Cody
gcody@ciw.edu
202-478-8980
Carnegie Institution
Source:Eurekalert

Related biology news :

1. New research reveals unexpected biological pathway in glaucoma
2. Unexpected findings of lead exposure may lead to treating blindness
3. Land evapotranspiration taking unexpected turn: huge parts of world are drying up
4. Waters unexpected role in blood pressure control
5. Unexpectedly high rate of multiple strains in fungal infection
6. Sonic hedgehog gene found in an unexpected place during limb development
7. Study reveals H1N1 unexpected weakness
8. Research reveals lipids unexpected role in triggering death of brain cells
9. Study points to new uses, unexpected side effects of already existing drugs
10. New study reveals unexpected relationship between climate warming and advancing treelines
11. 1-finger exercise reveals unexpected limits to dexterity
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/22/2017)... 2017   Neurotechnology , a provider of ... announced the release of the SentiVeillance 6.0 ... facial recognition using up to 10 surveillance, security ... The new version uses deep neural-network-based facial detection ... utilizes a Graphing Processing Unit (GPU) for enhanced ...
(Date:3/22/2017)... Vigilant Solutions , a vehicle location ... announced today the appointment of retired FBI special agent ... business development. Mr. Sheridan brings more than ... focus on the aviation transportation sector, to his new ... Sheridan served as the Aviation Liaison Agent Coordinator (ALAC) ...
(Date:3/20/2017)... Pa. , March 20, 2017 PMD ... 2.0 personal spirometer and Wellness Management System (WMS), a ... Founded in 2010, PMD Healthcare is a Medical ... with a mission dedicated to creating innovative solutions that ... life. With that intent focus, PMD developed the first ...
Breaking Biology News(10 mins):
(Date:3/22/2017)... PALM BEACH, Florida , March 22, 2017 ... ... management for various cancer conditions are being pressured as of ... pain therapy for cancer pain management has a dramatic impact ... ramp up research and development activities for identifying new forms ...
(Date:3/22/2017)... 22, 2017   VWR (NASDAQ: ... product and service solutions to laboratory and ... acquired EPL Archives, Inc., an international biorepository ... entire regulated product research, development and commercialization ... and ancillary services. EPL Archives is widely ...
(Date:3/22/2017)... (PRWEB) , ... March 21, 2017 , ... ... of biologics. To acquire information on the desired increase and/or decrease in antibody-dependent ... industry for rapid N-glycosylation profiling of therapeutic antibodies. , To meet this ...
(Date:3/22/2017)... ... March 21, 2017 , ... The Conference Forum has announced ... to be held on May 10-11, 2017, at the Colonnade Hotel in Boston, MA. ... Chief Medical Officer peer-to-peer learning, benchmarking and support. , “The Chief Medical Officer faces ...
Breaking Biology Technology: