Navigation Links
New research throws doubt on earlier 'killer walrus' claims
Date:1/17/2013

Palaeontologists who examined a new fossil found in southern California have thrown doubt on earlier claims that a "killer walrus" once existed.

Geology PhD student Robert Boessenecker from New Zealand's University of Otago and co-author Morgan Churchill from the University of Wyoming have today published their paper about the fossil in the online scientific journal PLOS ONE.

The paper reports that the new fossil-find, of the extinct walrus Pelagiarctos from southern California, prompts a different hypothesis to an earlier one that a "killer walrus" existed, preying on other marine mammals and/or birds.

Fossils of the walrus were originally found in the 1980s. The large, robust size of the jaw bone, along with the sharp pointed cusps of the teeth similar to modern bone-cracking carnivores like hyenas, suggested that Pelagiarctos fed upon other marine mammals rather than the typical diet of fish as in modern walruses.

However the new fossil, a lower jaw with teeth, and more complete than the original fossil, suggests to the Otago and Wyoming palaeontologists that the Pelagiarctos was more of a fish eater as it lacked adaptations for being a "killer walrus".

The evidence pointed to the tooth shape being unlikely to have been adapted for feeding upon large prey; instead it was an example of primitively retained tooth shape.

"This new find indicates that this enigmatic walrus would have appeared similar in life to modern sea lions, with a deep snout and large canines," says Mr Boessenecker.

The researchers estimated Pelagiarctos to be similar in size to some modern male sea lions (about 350 kg or 770 lbs).

"However, modern pinnipeds (seals, sea lions, and walruses) of small and large body sizes are dietary generalists, and tend to have diets rich in fish including sea lions similar in body size to Pelagiarctos, which means that its large body size alon
'/>"/>

Contact: Bobby Boessenecker
robert.boessenecker@otago.ac.nz
University of Otago
Source:Eurekalert

Page: 1 2

Related biology news :

1. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
2. Research reveals first evidence of hunting by prehistoric Ohioans
3. Diabetes Research Institute develops oxygen-generating biomaterial
4. APS issues new policy requiring identification of sex or gender in reporting scientific research
5. UC Santa Barbara researchers discover genetic link between visual pathways of hydras and humans
6. Study jointly led by UCSB researcher supports theory of extraterrestrial impact
7. U of Alberta researcher steps closer to understand autoimmune diseases
8. Research on flavanols and procyanidins provides new insights into how these phytonutrients may positively impact human health
9. A project to research biological and chemical aspects of microalgae to fuel approach
10. Scripps Research discoveries lead to newly approved drug for infant respiratory distress syndrome
11. Researchers attempt to solve problems of antibiotic resistance and bee deaths in one
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/21/2015)... , July 21, 2015  NXT-ID, Inc. (NASDAQ: ... biometric authentication company focused on the growing mobile ... wallet, announces that it has filed provisional patent ... Method. This invention highlights next ... authorizes an account, but also the user using ...
(Date:7/20/2015)... 2015  Acuity Market Intelligence,s latest research "The ... Commerce and Privacy" forecasts that between 2014 and ... be downloaded to smart mobile devices by 2.2 ... is projected to generate more than $67.9 billion ... forecast period.    "Biometrics is at ...
(Date:7/13/2015)... OXFORD, Conn. , Jul. 13, 2015 /PRNewswire/ ... the "Company"), a biometric authentication company focused on ... it has filed provisional patent 62/188684 for ... NXT-ID achieves another new convenient and secure method ... expands new, innovative payment methods, introduced with its ...
Breaking Biology News(10 mins):NXT-ID Patents Personalized Tokenized Payments for Next Generation Secure Payment Technology 2NXT-ID Patents Personalized Tokenized Payments for Next Generation Secure Payment Technology 3NXT-ID Patents Personalized Tokenized Payments for Next Generation Secure Payment Technology 4Biometrics on Smart Mobile Devices to Redefine Digital Identity with 12.9 Billion Biometric App Downloads between 2014 and 2020 2NXT-ID Patents Behavior-Directed Payments 2NXT-ID Patents Behavior-Directed Payments 3NXT-ID Patents Behavior-Directed Payments 4
... season coming up soon, egg consumption is expected to rise temporarily. ... of eggs they can? "Parasites such as fowl mites that ... more," says Bradley A. Mullens , a professor of ... to boost egg production is to rid the hens of these ...
... bacteria in the genus Rickettsia spread through a population of ... pest of global importance. Infected insects lay more eggs, develop ... to their uninfected peers. The discoveries were made by ... in the April 8 issue of the journal Science ...
... known to favor the evolution of a variety of traits, ... changes in metabolism and feeding behavior. Now researchers reporting online ... Press publication, have added sleeplessness to that list. "Cave-adapted ... Borowsky of New York University. "In some ways, their sleep ...
Cached Biology News:UC Riverside entomologists propose pesticide-free method to increase egg production 2Instant evolution in whiteflies: Just add bacteria 2Instant evolution in whiteflies: Just add bacteria 3Instant evolution in whiteflies: Just add bacteria 4Through evolution, cavefish have lost sleep 2
(Date:7/30/2015)... 30, 2015 Ascendis Pharma A/S (Nasdaq: ... its innovative TransCon technology to address significant unmet ... a six-month Phase 2 study to evaluate the ... in 53 treatment-naïve, pre-pubertal children with growth hormone ... pleased with the top-line results from our Phase ...
(Date:7/30/2015)... (PRWEB) , ... July 30, 2015 , ... ... for advanced fluid applications and designed for continuous operation up to 1500 bar. ... sterilization-in-place, ensuring safety, efficiency, and preventing toxic contamination. , The Pony™ NS2006L homogenizer ...
(Date:7/29/2015)... July 29, 2015 US-Australian drug discovery company, ... confirmed it is committed to progressing its ground-breaking technology ... practicable and to ensure the Company delivers the best ... Iain Ross , said the Company currently had ... pre-clinical programs, discovery programs and academic partnerships and initiatives, ...
(Date:7/29/2015)... SAN FRANCISCO , July 29, 2015 /PRNewswire/ ... trialling mobile molecular testing for applications in food ... Ubiquitome,s hand-held, battery powered real-time PCR device, the ... the farm right through to the supermarket shelf ... world. This includes involvement in animal disease control ...
Breaking Biology Technology:Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 2Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 3Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 4Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 5Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 6Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 7GEA Announces the Pony™ NS2006L… a Self-contained, High Pressure Lab Homogenizer for Product Development Ensuring Maximum Efficiency and Safety 2Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 2Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 3Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 4Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 5Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 6Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 7Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 8Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 9Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 10AsureQuality and Ubiquitome Partner on Applications for Mobile Molecular Food Safety Testing 2
... promises of stem cells is the creation of new organs, grown ... organ donation. But experts expressed concerns at last week's Stem Cell ... cures do not materialize, and among investors if nobody can make ... stem cells could be used in the medical and pharmaceutical industries, ...
... also the corporate parent of U.S. Cellular, said its revenues for ... last year that it had to restate due to accounting problems. ... $43.3 million in the same quarter a year ago. , ,TDS ... from as early as 2000 through 2005. The process delayed the ...
... Wis. - Two weeks after solidifying its global market ... Thursday boosted its line of working capital as well. The ... funding from three venture capital sources. , ,Imago, a provider ... completed another round of funding with funding led by ...
Cached Biology Technology:Stem cells raise hopes, but is there money in them? 2Stem cells raise hopes, but is there money in them? 3Investors commit $3.4 million to Imago 2
... The SYS203 is a complete, flexible ... in small samples, as is frequently ... is designed around Instechs miniature Clark-style ... an inch in diameter (3.2 mm), ...
... Cell Identification Kit. ALDEFLUORs ... substrate for the enzyme ... is highly expressed in ... making ALDH an extremely ...
... The GSTTag Monoclonal Antibody is a ... affinity to the 26 kDa glutathione-S-transferase ... This purified antibody is suitable for ... sequence expressed in E. coli , ...
... The MetaVue Imaging System is the cost-effective ... With commands tailored to common research imaging ... morphometric analysis and simple image analysis. ... control library means that MetaVue has the ...
Biology Products: