Navigation Links
Hippo ancestry disputed
Date:3/18/2009

Hippos spend lots of time in the water and now it turns out (or researchers argue), they are the closest living relative to whales. It also turns out, the two are swimming in a bit of controversy.

Jessica Theodor, an associate professor in the Department of Biological Sciences at the University of Calgary, and her colleague Jonathan Geisler, associate professor at Georgia Southern University are disputing a recent study that creates a different family tree for the hippo.

That research was published in Nature in December 2007 by J. G. M. Thewissen, a professor at Northeastern Ohio Universities College of Medicine, and his colleagues. Thewissen says that whales are more closely linked to an extinct pig-like animal, often known as India's pig or Indohyus, while hippos are closely related to living pigs.

But this isn't accurate according to Theodor.

"What Thewissen is saying is that Indohyus is the closest relative of whales - and we agree. Where we think he is wrong, is that he is saying that that hippos are more closely related to true pigs than they are to whales," says Theodor. "This contradicts most of the data from DNA from the last 12 or 13 years. Those data place hippos as the closest living relative to whales."

She says Thewissen did not use DNA evidence, instead used fossil evidence alone to create a family tree and reach the conclusion that hippos have more in common with pigs than whales.

"And the reason their tree is so different is simple: by excluding all the DNA information they left out all the data that shows a strong relationship between whales and hippos."

Theodor's rebuttal of Thewissen's work will appear in Nature on Thursday, March 19.

The controversy began after the new fossil of Indohyus, was discovered and written about by Thewissen and his group. This animal lived around 48 million years ago, lived in the water and fed on land.

When biolog
'/>"/>

Contact: Leanne Yohemas
leanne.yohemas@ucalgary.ca
403-220-5144
University of Calgary
Source:Eurekalert

Page: 1 2

Related biology news :

1. Computer program traces ancestry using anonymous DNA samples
2. Green algae -- the nexus of plant/animal ancestry
3. European ancestry increases breast cancer risk among Latinas
4. Mountain caribous ancient ancestry revealed
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/10/2014)... -- You,ve been here before: you desperately need to sign ... site key or the answer to your secret question. What,s ... Today, Hoyos Labs , a digital infrastructure ... put an end to the frustration that comes with usernames, ... leverages a user,s smartphone to acquire his or her biometrics ...
(Date:12/10/2014)... , Dec. 9, 2014 CIE San Diego ... that provides the connective tissue that enhances care coordination ... to easily share client-level information; earned a second $1 ... to organizations serving seniors aging in community and; will ... on December 11 th 4-6p. CIE ...
(Date:12/5/2014)... Dec. 4, 2014 Increased emphasis on ... in new testing and inspection technologies. The convergence ... to a range of innovative test solutions. This ... Generation Y, which is generally more inclined towards ... product development strategies of test equipment vendors will ...
Breaking Biology News(10 mins):The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 3Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 4
... the Mississippi River and other areas are altering their ... researcher from Iowa State University. Fred Janzen, a ... turtle nesting habits and also accumulated research going back ... turtles to find out when they make nests and ...
... we are and how we play with others, but recent ... that the interaction between genes and behavior is more of ... is not a new idea to neuroscience, but one that ... professor Gene Robinson, lead author of a review on the ...
... Sea snakes may slither in saltwater, but they sip ... Florida zoologist in a paper appearing this month in ... journal Physiological and Biochemical Zoology . Harvey ... the roughly 60 species of venomous sea snakes worldwide ...
Cached Biology News:Turtles alter nesting dates due to temperature change says ISU researcher 2Social interactions can alter gene expression in the brain, and vice versa 2Social interactions can alter gene expression in the brain, and vice versa 3Zoologists: Sea snakes seek out freshwater to slake thirst 2Zoologists: Sea snakes seek out freshwater to slake thirst 3
(Date:12/24/2014)... SARASOTA, Fla. , Dec. 23, 2014  Rock ... today that it has filed a Clinical Trial Application ... Medicines Healthcare products Regulatory Agency (MHRA) seeking regulatory approval ... its lead molecule, Anatabine Citrate. Contingent on ... to conduct a Phase I trial to assess the ...
(Date:12/22/2014)... 22, 2014   Synthetic Biologics, Inc. ... pathogen-specific therapies for serious infections and diseases, ... today announced positive topline safety and tolerability ... of SYN-004, the Company,s investigational oral beta-lactamase ... difficile (C. difficile) infection, antibiotic-associated diarrhea ...
(Date:12/22/2014)... GenomeDx Biosciences today announced that a new ... genomic test for prostate cancer, was able to predict ... radical prostatectomy without adjuvant therapy. Although rapid metastasis in ... tumor genomics to identify these men who have a ... advance. The study has been published online by ...
(Date:12/22/2014)... ITRA Global, one of the largest organizations dedicated ... has further expanded its global reach with the affiliation ... Australia, reports Mylinda Vick, CCIM, Chairman of the ITRA ... ACORPP (Australian Corporate Property and Projects) , is a ... to a wide range of clients in the private ...
Breaking Biology Technology:Rock Creek Pharmaceuticals Files Clinical Trial Application in the UK for Clinical Trials of Anatabine Citrate Formulations 2Rock Creek Pharmaceuticals Files Clinical Trial Application in the UK for Clinical Trials of Anatabine Citrate Formulations 3Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 2Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 3Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 4Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 5Study Published in European Urology Shows that the Decipher Prostate Cancer Classifier is Predictive of Rapid Metastasis in High-Risk Men who have had Prostate Surgery 2Study Published in European Urology Shows that the Decipher Prostate Cancer Classifier is Predictive of Rapid Metastasis in High-Risk Men who have had Prostate Surgery 3ITRA Global Continues International Expansion in Perth and Brisbane, Australia 2
... March 29, 2011 AMDeC, LLC ... Program to include products offered by Sigma® Life ... of Sigma-Aldrich® (Nasdaq: SIAL).  AMDeC is a consortium ... New York region that is focused on increasing ...
... 2011 Tibotec Pharmaceuticals announced today that four abstracts ... C protease inhibitor, have been accepted for presentation at ... the Study of the Liver (EASL) in Berlin, Germany, ... The four abstracts for TMC435 support Tibotec,s continued efforts ...
... 29, 2011 Soligenix, Inc. (OTC Bulletin Board: ... biopharmaceutical company, announced today its financial results for the ... revenues for the year ended December 31, 2010 were ... representing a decrease of $868,409, or 31%.  During 2009, ...
Cached Biology Technology:Sigma® Life Science Joins AMDeC's Vendor Partnership Program, Further Enhancing Value to Academic Medical Research Centers 2Sigma® Life Science Joins AMDeC's Vendor Partnership Program, Further Enhancing Value to Academic Medical Research Centers 3Sigma® Life Science Joins AMDeC's Vendor Partnership Program, Further Enhancing Value to Academic Medical Research Centers 4Tibotec Advances Global Clinical Research Program for TMC435 in HCV; Will Present Four Abstracts Evaluating Safety and Efficacy at EASL 2Tibotec Advances Global Clinical Research Program for TMC435 in HCV; Will Present Four Abstracts Evaluating Safety and Efficacy at EASL 3Soligenix Reports Year-End 2010 Financial Results and Highlights Recent Accomplishments 2Soligenix Reports Year-End 2010 Financial Results and Highlights Recent Accomplishments 3Soligenix Reports Year-End 2010 Financial Results and Highlights Recent Accomplishments 4Soligenix Reports Year-End 2010 Financial Results and Highlights Recent Accomplishments 5
... for the rapid purification of linear 100 bp ... DNA band is excised from an,agarose gel and ... base of the column are a series of ... back while allowing DNA to selectively pass through ...
... is Tecans state-of-the-art software for all your ... scheduling in a single, scalable software package. ... consistent, simplifying the control of all Freedom ... Freedom EVO 100 with one liquid handling ...
...
... Isolation Kit provides all the reagents ... vesicle fraction. The isolation procedure involves ... synaptosomes, and differential centrifugation followed by ... also contains an antibody specific for ...
Biology Products: