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  

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:8/21/2014)... developed a novel and versatile modeling strategy to simulate ... materials as well as for studying polyelectrolytes, including DNA ... model much larger and more complex polyelectrolyte systems, and ... lead author of a paper on the work and ... Science and Engineering. "This is a big step forward ...
(Date:8/20/2014)... ITHACA, N.Y. In a study of 158 pregnant ... the craving and intentional consumption of ice, cornstarch, ... items, reports a new Cornell study. , Moreover, such ... teens who did not eat nonfood substances. , Pregnant ... low hemoglobin, which can lead to iron deficiency and ...
(Date:8/20/2014)... Issue Serious allergic reactions to food ... for some children.    What you should know ... allergies and this number may be increasing, especially among children. ... have food allergies.  The symptoms of allergic ... breathing difficulties and loss of consciousness. Symptoms can also develop ...
Breaking Biology News(10 mins):Researchers develop models to study polyelectrolytes, including DNA and RNA 2Pica in pregnant teens linked to low iron 2Information Update - Allergens and food safety at school - What's in your child's lunch? 2Information Update - Allergens and food safety at school - What's in your child's lunch? 3
... Spanish . , The potentially deadly yellow-fever-transmitting ... a compound called octenol as one way to find a ... scientists report. Scientists have long known that mosquitoes can ... Joseph Dickens and Jonathan Bohbot explains in greater detail how ...
... American Institute of Biological Sciences (AIBS) has selected Meredith ... Davis, Ryan Richards, a graduate student at the University ... student at the University of Rhode Island, to receive ... "AIBS is committed to fostering a productive ...
... Spring Harbor, NY -- One seemingly insurmountable obstacle to the ... wheat and rice is the dependence of those plants on ... and egg -- combine randomly to generate a genetically unique ... But what if plants like these could be engineered ...
Cached Biology News:ARS study provides a better understanding of how mosquitoes find a host 2AIBS names emerging public policy leaders 2AIBS names emerging public policy leaders 3CSHL-Mexican team coaxes sexually reproducing plant to brink of asexual reproduction 2
(Date:8/21/2014)... 21, 2014  Four-dimensional (4-D) printing develops materials ... external stimuli such as changes in temperature. This ... effect in multiple industries.  In the near future, ... printing objects ranging from human organs to parts ... Logo - http://photos.prnewswire.com/prnh/20140820/138289 ...
(Date:8/21/2014)... Ontotext S4 , The Self Service Semantic ... Now the same enterprise hardened text mining, Linked Data ... is available to start-ups and mid-size businesses at a ... do not have resources to evaluate and prototype enterprise ... there is no need for on premise hardware provisioning ...
(Date:8/21/2014)... August 21, 2014 SoundConnect ... been recognized as one of the nation’s Fastest ... magazine for the 2nd consecutive year. Inc. magazine ... annual Inc. 500|5000, an exclusive ranking of the ... most comprehensive look at the most important segment ...
(Date:8/20/2014)... Clintrax Global, Inc., a worldwide provider ... Raleigh, NC , recently announced the addition ... of Administration. As Vice President ... including their alignment with company objectives and policies.  ... an HR executive, specializing in needs assessments, customer ...
Breaking Biology Technology:Frost & Sullivan: 4-D Printing to Usher in Age of Low-Labor, Fast-Paced Product Manufacturing 2Frost & Sullivan: 4-D Printing to Usher in Age of Low-Labor, Fast-Paced Product Manufacturing 3Frost & Sullivan: 4-D Printing to Usher in Age of Low-Labor, Fast-Paced Product Manufacturing 4Ontotext Releases Text Mining & Semantic Technology Running in the Cloud – Welcome to “S4? 2Ontotext Releases Text Mining & Semantic Technology Running in the Cloud – Welcome to “S4? 3Ontotext Releases Text Mining & Semantic Technology Running in the Cloud – Welcome to “S4? 4SoundConnect Returns on Inc. 5000 List of Fastest Growing Companies 2SoundConnect Returns on Inc. 5000 List of Fastest Growing Companies 3Clintrax Global, Inc. Announces Addition to Executive Team 2
... 14, 2012 AMPAC Fine Chemicals LLC (AFC), a ... APFC ), reports that it has joined Rx-360 ... biotech industry consortium that was founded by industry leaders ... and to assure the quality and authenticity of the ...
... 2012 Neuralstem, Inc. (NYSE Amex: CUR ) ... registered direct placement of 5,200,000 shares of common stock at ... with an exercise price of $1.02 per share and exercisable ... of five years. The company received aggregate gross proceeds of ...
... Ill., Feb. 13, 2012 Hospira, Inc.  (NYSE: ... injectable drugs and infusion technologies, today announced the hiring ... and compliance capabilities, including the appointment of Zena G. ... 2012. In this role, Ms. Kaufman will have overall ...
Cached Biology Technology:AMPAC Fine Chemicals Continues to Invest in Quality Systems 2AMPAC Fine Chemicals Continues to Invest in Quality Systems 3Neuralstem Announces Closing of $5.2-Million Registered Direct Offering 2Hospira Names Zena G. Kaufman Senior Vice President of Quality; Strengthens Quality and Compliance Capabilities With Addition of Top Industry Talent 2Hospira Names Zena G. Kaufman Senior Vice President of Quality; Strengthens Quality and Compliance Capabilities With Addition of Top Industry Talent 3Hospira Names Zena G. Kaufman Senior Vice President of Quality; Strengthens Quality and Compliance Capabilities With Addition of Top Industry Talent 4Hospira Names Zena G. Kaufman Senior Vice President of Quality; Strengthens Quality and Compliance Capabilities With Addition of Top Industry Talent 5
... is used to perform runs with ... the Experion automated electrophoresis system. The ... simulated gel views and summarizes size, ... Results table. This software is for ...
... rolled steel with stove enamel coated (RAL 7035 ... Front, back and side windows ... lamps Internal adjustable tempered glass shelf ... Lighting 600 lux ...
...
... this set of Antibody Microarray slides ... a total of over 2100 spots,including ... control. Antibodies belonging to many important ... cycle progression, signal transduction and gene ...
Biology Products: