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

This release is available in French.

Scientists have discovered direct evidence of the diet of one of the most important group of ammonites, distant relatives of squids, octopuses and cuttlefishes. The discovery may bring a new insight on why they became extinct 65.5 million years ago, at the end of the Cretaceous.

Ammonites are among the world's most well known fossils but until now, there has been no experimental evidence of their place in the food chain. Using synchrotron X-rays, a Franco-American team of scientists led by Isabelle Kruta has discovered exceptionally preserved mouth organs of ammonites, along with the remains of a meal that show that these ammonites dined on plankton. Plankton was largely destroyed in the wake of the same asteroid impact that led to the demise of the dinosaurs and other species. After losing their source of food, ammonites and many other marine groups could not survive this cataclysmic event. The findings are published this week in Science.

Ammonites are extinct relatives of the squid and octopus. The Nautilus, a present-day marine invertebrate, is similar in appearance to many ammonites but is a more distant relative. Ammonites appeared about 400 million years ago (the Early Devonian) and experienced a population explosion in the early Jurassic. In fact, ammonites became such an abundant and diverse part of the marine fauna that they are used by paleontologists as classic "index" fossils to determine the relative ages of marine Mesozoic rocks in which they are found.

The team of researchers, led by Isabelle Kruta (MNHN, CNRS, UPMC), used the ESRF to perform X-ray scans of exceptional quality of Baculites fossils found on AMNH expeditions to the Great Plains in the United States. Results suggests that the large group of ammonites to which Baculites belongs, had jaws and radula (a kind of
'/>"/>

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:7/10/2014)... N.Y. , July 2, 2014 It ... (ABD) to announce the appointment of the world-renowned Thoracic ... Board of Directors. Dr. Ginsburg, with over ... facilities: NY Presbyterian Hospital and Good Samaritan Regional Medical ... Pacemaker since the late 1980,s and is considered an ...
(Date:7/10/2014)... 2014 According to the new ... And Area), Material (Optical Prism, Pizeoelectric, Capacitive, and Adhesives), ... Banking & Finance), and Geography - Global Trends & ... global Fingerprint Sensors Market is projected to cross $14.35 ... 16.8% from 2014 to 2020. Browse more ...
(Date:7/10/2014)... 7, 2014 Fingerprint Cards, (FPC,s) new ... win (DW). A Chinese Top 5 smartphone OEM has selected ... mass production in October 2014.   FPC is ... smartphone OEM, which has a planned date for the start ... volume for this phone of 3 million units. The Chinese ...
Breaking Biology News(10 mins):Avery Biomedical Devices, Inc. announces the appointment of Mark E Ginsburg, M.D. to its Board of Directors 2Fingerprint Sensors Market worth $14.35 Billion by 2020 2Fingerprint Sensors Market worth $14.35 Billion by 2020 3FPC Wins DW for 1021 Touch Sensor for Flagship Smartphone from Chinese Top 5 Smartphone OEM 2
... 2010 The American Society for Biochemistry and Molecular ... the nonprofit,s annual awards. Another winner was announced earlier ... the society,s annual meeting April 9-13 in Washington, D.C., ... Hughes Medical Institute investigator Axel T. Brunger won the ...
... Lysis of Thromboembolic Stroke (CLOTS)an intensive five-day course ... 24-28 in Dallas, Texasprovides interventional radiologists, neurointerventionalists, vascular ... to review, observe and discuss all aspects of ... third-leading cause of death in the United States, ...
... scientific discoveries these days. Two middle school students from ... the first glimpse of the innermost structure of a ... anti-cancer agents so that those substances do their job. ... . The student co-authors of the study are from ...
Cached Biology News:American Society for Biochemistry and Molecular Biology honors 11 outstanding scientists 2American Society for Biochemistry and Molecular Biology honors 11 outstanding scientists 3American Society for Biochemistry and Molecular Biology honors 11 outstanding scientists 4Explore stroke care with Society of Interventional Radiology's CLOTS 2
(Date:7/11/2014)... Cayenne Medical, Inc., a privately ... soft tissue reconstruction segment, announced the worldwide launch ... involving the shoulder and extremities. The SureLock System ... deployment method. The unique delivery eliminates manual tensioning ... or anchor displacement (also commonly know as anchor ...
(Date:7/10/2014)... Boston, Mass. (PRWEB) July 10, 2014 ... , today announced that Alan Swahn, a former vice ... Terascala’s executive team as vice president of marketing. Terascala’s ... from Dell and NetApp create the highest performance and ... has been appointed to guide Terascala’s channel expansion and ...
(Date:7/10/2014)... Calabasas, CA (PRWEB) July 10, 2014 ... academic institutions and professional associations, addressed the challenges of ... & Medical Device Industries” through strategic sourcing. Describing the ... ) with the Supply Chain Management Institute ( SCMI) ... the event on June 24 at the Kroc Institute ...
(Date:7/10/2014)... -- Research and Markets ( http://www.researchandmarkets.com/research/s3bqj2/photonic ) has ... Integrated Circuit (Monolithic Integration, Hybrid Integration, Module Integration) ... their offering. http://photos.prnewswire.com/prnh/20130307/600769 ... traces its roots in the latter half of ... went unexplored and unfulfilled for several decades owing ...
Breaking Biology Technology:Cayenne Medical Launches SureLock™ All-Suture Anchor System for Shoulder and Extremity Surgery 2Cayenne Medical Launches SureLock™ All-Suture Anchor System for Shoulder and Extremity Surgery 3Terascala Expands Executive Team 2Terascala Expands Executive Team 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 2Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 4International Photonic Integrated Circuit (Monolithic Integration, Hybrid Integration, Module Integration) Market - Forecasts to 2019 2
... Kit , , ... MicroRNAs (miRNAs) are extremely small RNA , ... of RNA in a sample (10 g total RNA contains ... their small size and low abundance, miRNAs can be extremely , ...
... Jaclyn Shingara, Kerri Keiger, Ila , ... R&D Division, , ... MicroRNAs (miRNAs) are small, , ... animals, that regulate the expression of genes by binding to , ...
... , Uncover Critical Regulatory Pathways by Analyzing a Complete Set of Human and Mouse ... The miRNA gene family contains ... yet their presence and , ... (see <A , ...
Cached Biology Technology:Highly Sensitive microRNA Array Performance 2Highly Sensitive microRNA Array Performance 3Highly Sensitive microRNA Array Performance 4Highly Sensitive microRNA Array Performance 5Highly Sensitive microRNA Array Performance 6Highly Sensitive microRNA Array Performance 7Highly Sensitive microRNA Array Performance 8MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers 2MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers 3MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers 4MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers 5MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers 6MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers 7MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers 8MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers 9MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers 10MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers 11MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers 12MicroRNA Profiling by Array Analysis Reveals Critical BioMarkers 13Novel MicroRNA Array Technology for Sensitive miRNA Profiling 2Novel MicroRNA Array Technology for Sensitive miRNA Profiling 3
DNA Repair Sampler Kit 10g each...
Protein Tyrosine Phosphatase Sampler Kit 10g each...
SH3 Proteins II Sampler Kit 10g each...
... Solid phase reagent for ... Easy & unique water ... with detergents and chaotropes; ... recover non-envelop viruses while ...
Biology Products: