Navigation Links
Ammonites' last meal: New light on past marine food chains
Date:1/6/2011

scovering nearly each time a radula and for one of them, many other structures."

Ammonite jaws lie just inside the body chamber. The research team's new scans of Baculites, a straight ammonite found world-wide, confirms older research that ammonites had multiple cusps on their radula teeth. The radula can now be seen in exquisite detail: the tallest cusp is 2 mm high, tooth shape varies from saber to comb-like, and teeth are very slender. The jaw is typical of this group of ammonites (the aptychophorans) in that the lower jaw is larger than the upper jaw and consists of two halves separated along a midline.

Until recently, the role of ammonites in the marine food web was unknown, although some clues were provided by Landman and colleagues on the shape of the jaw, as well as a 1992 paper by Russian scientists that reconstructed some of the internal structures by slicing fossils..

"The plankton in the Baculites jaws is the first direct evidence of how these uncoiled ammonites fed. This helps in understanding their evolutionary success in the Cretaceous." says Fabrizio Cecca (UPMC).

"Our research suggests several things. First, the radiation of aptychophoran ammonites might be associated with the radiation of plankton during the Early Jurassic," say Landman. "In addition, plankton were severely hit at the Cretaceous-Tertiary boundary, and the loss of their food source probably contributed to the extinction of ammonites. This research has implications for understanding carbon cycling during this time".

Isabelle Rouget (UPMC) agrees, adding that "we now realize that ammonites occupied a different niche in the food chain than we previously thought."


'/>"/>

Contact: Claus Habfast
claus.habfast@esrf.fr
33-666-662-384
European Synchrotron Radiation Facility
Source:Eurekalert  

0

GOOD

Page: 1 2 3

Related biology news :

1. New discoveries in North Americas Great Plains bring ammonites to life
2. New book highlights the cellular and molecular determinants of brain wiring
3. UNC scientists pinpoint link between light signal and circadian rhythms
4. Scripps scientists see the light in bizarre bioluminescent snail
5. Unlocking the secrets of a plants light sensitivity
6. Unlocking the secrets of a plant’s light sensitivity
7. Celldance spotlights cell biologists images and videos
8. 2 books explore the history and delights of honey, bees and beehives
9. Firefly protein lights pathway to improved detection of blood clots
10. Tiny laser light show illuminates quantum computing
11. Babies biological clocks dramatically affected by birth light cycle
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Ammonites' last meal: New light on past marine food chains
(Date:5/21/2013)... new method for delivering molecules into single, targeted ... The technique could find applications in drug delivery, ... electroporation a technique used to deliver molecules ... membrane that are caused by exposing them to ... of cell transfection. (Cell transfection is the introduction ...
(Date:5/21/2013)... available in pharmacies and health stores, phosphatidylserine is ... and soy. Proven to improve cognition and slow ... people experiencing memory impairment. Now a team headed ... of Tel Aviv University,s Department of Human ... supplement improves the functioning of genes involved in ...
(Date:5/21/2013)... Chemical Society (ACS), the world,s largest scientific society, ... Meeting & Exposition, September 8-12, 2013, in Indianapolis, ... Convention Center and at area hotels. , With ... span science,s horizons from astronomy to zoology ... online journalists a rich assortment of spot news ...
Breaking Biology News(10 mins):Single-cell transfection tool enables added control for biological studies 2Common food supplement fights degenerative brain disorders 2
... key protein that regulates the biological clocks of mammals ... altering the levels of this protein can improve the ... this week,s advanced online publication of the journal ... for scientists to develop treatments for obesity and type ...
... Two researchers at Marshall University have been awarded federal ... effects of omega-3 fatty acids on breast cancer development. ... Research Program has awarded Dr. Elaine Hardman, associate professor ... Joan C. Edwards School of Medicine, and Dr. Philippe ...
... largely by the clock, from the alarms that startle us ... the watches and clocks that remind us when it,s time ... addition to those ubiquitous timekeepers, though, we have internal "clocks" ... set our circadian rhythms, regulating everything from our sleep-wake cycles ...
Cached Biology News:Biologists discover biochemical link between biological clock and diabetes 2Biologists discover biochemical link between biological clock and diabetes 3Biologists discover biochemical link between biological clock and diabetes 4Marshall University researchers awarded more than $1 million for breast cancer studies 2Marshall University researchers awarded more than $1 million for breast cancer studies 3Tick tock: Rods help set internal clocks, biologist says 2
(Date:5/22/2013)... May 22, 2013 Express Diagnostics ... Pty Ltd are pleased to announce a sponsorship ... Australian and New Zealand distributor of DrugCheck® onsite testing ... Team participated in the Austin 400 May 17-19 in ... an agreement that involves each car of the Erebus ...
(Date:5/22/2013)... 22, 2013 Envera announced today that ... Mr. McErlean has an extensive background in cell ... throughout his career. , Mike Matheny, President ... to have Mike join our team”. “Mike’s background is ... fermentation and downstream processing equipment”, added Matheny. ...
(Date:5/22/2013)... 22, 2013 The ability to ... the information they encode. There are now a ... sequencing of ribosome protected fragments) that dramatically expand ... Keynote speakers include Dr. Jonathan Weissman, an Investigator ... Howard Hughes Medical Institute, who will present recent ...
(Date:5/21/2013)... 22, 2013 First patients dosed ... glycopyrronium bromide designed using Prosonix, particle engineering platform ... portfolio of inhaled Respiratory Medicines by Design , ... that will assess its effect on lung function and ... with moderate to severe chronic obstructive pulmonary disease (COPD). ...
Breaking Biology Technology:Australian Distributor of Express Diagnostics Signs Sponsorship Agreement with V8 Supercar Team 2Envera Appoints Michael McErlean Fermentation Manager 2Monitoring Protein Synthesis One Codon at a Time Through Ribosome Profiling, a Webinar Hosted by Xtalks 2Prosonix Initiates Phase 2 Clinical Study with PSX1002 in Patients with Moderate to Severe Chronic Obstructive Pulmonary Disease (COPD) 2Prosonix Initiates Phase 2 Clinical Study with PSX1002 in Patients with Moderate to Severe Chronic Obstructive Pulmonary Disease (COPD) 3Prosonix Initiates Phase 2 Clinical Study with PSX1002 in Patients with Moderate to Severe Chronic Obstructive Pulmonary Disease (COPD) 4
... ... work based on data collected at the U.S. Department of Energy,s (DOE) Argonne National Laboratory. ... Argonne, Ill. (Vocus) ... award-winning work based on data collected at the U.S. Department of Energy,s (DOE) Argonne National ...
... Today the National Collegiate Inventors and Innovators Alliance ... recognizing undergraduate excellence in biomedical innovation. BMEStart stands ... because of its focus on younger inventors who ... development. , The BMEStart competition welcomes submissions ...
... Brad Thompson, President and CEO of Oncolytics Biotech Inc. ... corporate overview of the Company at the 17th Annual ... 12 at 10:15 a.m. The conference is taking place ... 11-13, 2009. , About Oncolytics Biotech Inc. , Oncolytics ...
Cached Biology Technology:Argonne's Advanced Photon Source Lit the Way to Chemistry Nobel 2Argonne's Advanced Photon Source Lit the Way to Chemistry Nobel 3NCIIA Announces New Undergraduate Competition 2Media Advisory - Oncolytics Biotech(R) Inc. to Present at BioPartnering Europe 2
... Quantitation Kit is one of the ... quantitation of RNA in solution. ... sensitive than absorbance measurements. As little ... with fluorescence microplate readers and fluorometers ...
Request Info...
Recommend to use at up to 5000X dilutions for cell culture (e.g. Add 1 ul to 1 ml of culture medium.)...
... purified from egg white. The extinction coefficient , ... in 10 mM phosphate-buffered saline, pH ... sodium azide and 50% glycerol. Avidin (from egg ... is purified by molecular sieving and ...
Biology Products: