Navigation Links
Research team finds first evolutionary branching for bilateral animals
Date:9/23/2009

PROVIDENCE, R.I. [Brown University] When it comes to understanding a critical junction in animal evolution, some short, simple flatworms have been a real thorn in scientists' sides. Specialists have jousted over the proper taxonomic placement of a group of worms called Acoelomorpha. This collection of worms, which comprises roughly 350 species, is part of a much larger group called bilateral animals, organisms that have symmetrical body forms, including humans, insects and worms. The question about acoelomorpha, was: Where do they fit in?

To scientists, acoelomorpha, has been enigmatic, a "rogue animal," said Casey Dunn, an evolutionary biologist at Brown University. "It has been wandering throughout the animal tree of life."

The worm wanders no more. Through a laborious genetic sequencing analysis, Dunn and an international team of scientists have settled the long-standing debate and determined that acoelomorpha belongs as a sister clade to other bilateral animals. The finding is significant, Dunn said, because it shows the worm is a product of the deepest split within the bilateral animals, the first evolutionary divergence within the group. Because of that, scientists have gained a key insight into the most recent common ancestor to bilaterians, a species that remains unknown.

The worm is "as distant as an animal can be in bilateria and still be a bilaterian," said Dunn, assistant professor of biology. "So, now we have two perspectives to (find out about) this common ancestor, the acoelomorphs and all the other bilateral animals."

The results appear online this week in the Proceedings of the Royal Society B.

The team, composed of 17 scientists from the United States, France Germany, Sweden, Spain and the United Kingdom, had two more interesting findings:

  • The debate appears to be over for Xenoturbella, a type of marine worm whose ancestral affiliation had been tossed betw
    '/>"/>

Contact: Richard Lewis
Richard_Lewis@Brown.edu
401-863-3766
Brown University
Source:Eurekalert  

Page: 1 2

Related biology news :

1. 57 college presidents declare support for public access to publicly funded research in the US
2. Georgia State researcher to use $1 million grant to improve computer models for fighting wildfires
3. LSUHSC researchers working to prevent diabetic neuropathy
4. UAB research finds childbearing increases chance of developing the metabolic syndrome
5. Researcher awarded $1.2 million grant to study centrosomes and cilia
6. UAB research team saves turtle species on the brink
7. Nanoresearchers challenge dogma in protein transportation in cells
8. Ben-Gurion University Alzheimers researcher demonstrates specific immune response to vaccine
9. 1 million euro EU grant for MDC diabetes researcher Dr. Francesca M. Spagnoli
10. MDC researchers discover molecule responsible for axonal branching
11. Cybernetwork to help K-State researchers study tallgrass prairie, respond to global warming
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Research team finds first evolutionary branching for bilateral animals
(Date:6/17/2015)... Deutschland und GERMANTOWN, Maryland , June ... ®   Produktlinie mit DNA-Tests verbessert den ... (NASDAQ: QGEN ; Frankfurt Prime Standard: QIA) hat ... STR-Testkits der Produktlinie Investigator ® ... Markt eingeführt. Die neuen Kits zur Erstellung genetischer Fingerabdrücke ...
(Date:6/16/2015)... , June 16, 2015  With the increasing ... security remains a top concern. The recent compromise of ... the need for strong authentication within government agencies. ... a biometric one-time password (OTP) authenticator, has been submitted ... (FIPS) 140-2 Level 3 validation for tamper proofing. ...
(Date:6/15/2015)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... commerce market, announces that its leading payment security technology, the ... Experience! @ NYC June 18th. Digital Experience! @ ... in technology to over 300 of the top media covering ... Pavilion in New York City from ...
Breaking Biology News(10 mins):QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 2QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 3QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 4QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 5QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 6Government Ready Biometric Security Approaching as HYPR Corp. Files FIPS 140-2 Level 3 Validation for Its Proprietary Biometric Token 2Government Ready Biometric Security Approaching as HYPR Corp. Files FIPS 140-2 Level 3 Validation for Its Proprietary Biometric Token 3Wocket Smart Wallet Exhibiting at Pepcom Digital Experience! @ NYC June 18th 2Wocket Smart Wallet Exhibiting at Pepcom Digital Experience! @ NYC June 18th 3
... finding life on other planets and in extreme environments ... new astrobiology initiative under a five-year grant from NASA,s ... Beyond." Christopher H. House, associate professor of geosciences, ... detect and characterize life, look for biological signatures in ...
... storms will continue to slam the Gulf Coast, and even ... more frequent. , How we handle them will be the ... Storm Prediction and Global Climate Impact in the Gulf Coast ... Storm Prediction, Education and Evacuation from Disaster Center, primary sponsor ...
... Computational Neurobiology Laboratory at the Salk Institute has been ... announced. Election to the IOM is considered one of ... medicine and recognizes individuals who have demonstrated outstanding professional ... "It is a great pleasure to welcome these distinguished ...
Cached Biology News:Penn State receives new NASA astrobiology grant 2Penn State receives new NASA astrobiology grant 3Weather woes emphasize need for SSPEED 2Salk researcher Terry Sejnowski elected to Institute of Medicine 2
(Date:7/3/2015)... ... July 03, 2015 , ... The Alexander Group, a 30-year ... industries alike-- typically known for its consummate professionalism-- embarks each year in a ... break from their day jobs. , "Our motto has always been work hard ...
(Date:7/3/2015)... 2015 Forskare kan ... på  http://www.openinnovationinscience.at till det återkommande utbildningsprogrammet ... hålls i Wien .  ... internationella forskare och vetenskapsmän som genomfördes av ... största utmaningar bristen på incitament för att ...
(Date:7/3/2015)...  Pomerantz LLP announces that a class action lawsuit ... the "Company")(NYSE: PBYI ) and certain of its ... Court, Central District of California , ... class consisting of all persons or entities who purchased ... 2015 inclusive (the "Class Period").  This class action seeks ...
(Date:7/2/2015)... ... ... been used in countless labs for decades. In the past, people had to go ... this was a daunting and tiring process looking at endless data tables and charts. ... the complex catalog structure. , Now thanks to FireflySci, scientists are throwing away those old ...
Breaking Biology Technology:The Alexander Group Declares Their Independence with a Bit of Levity 2Lansering av världens första program för öppen innovation för att utbilda forskare 2Lansering av världens första program för öppen innovation för att utbilda forskare 3SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 2SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 3SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 4New Cuvette E-Commerce Website Launched by FireflySci 2
... treatment for the underlying process not just the ... Governor's Business Plan Contest on Tuesday, receiving a ... a University of Wisconsin-Madison spinoff, emerged as an early ... judges. Even before that, co-founder Jeff Johnson, the professor ...
... eleventh-annual and largest-ever Venture Forum was held two weeks ... 130 technology companies to an audience of several hundred ... be of particular interest to Midwest technology entrepreneurs as ... too. , ,The forum is organized by the Larta ...
... State Senator Ted Kanavas remains optimistic that his ... pass the legislature yet this year. , ... Representative Jeff Fitzgerald, R-Horicon, would require companies that ... notify those people when that data is obtained ...
Cached Biology Technology:Alzheimer's drug firm and more winners named in Wisconsin business-plan contest 2Alzheimer's drug firm and more winners named in Wisconsin business-plan contest 3Alzheimer's drug firm and more winners named in Wisconsin business-plan contest 4Midwest fares surprisingly well at Venture Forum in Los Angeles 2Midwest fares surprisingly well at Venture Forum in Los Angeles 3Midwest fares surprisingly well at Venture Forum in Los Angeles 4Kanavas thinks personal ID theft bill will pass this year 2
Human peripheral blood CD19+ B cells, For immunohistochemistry (IHC) Cell Chip with Human Peripheral Blood Monocytes, B Cells, NK Cells and Stem Cells...
Human peripheral blood basophils, For immunohistochemistry (IHC) Cell Chip with Human Peripheral Blood Granulocytes...
Umbilical cord blood CD4+ T cells, For immunohistochemistry (IHC) Cell Chip with Human Umbilical Cord Blood MNCs and T Cells...
... Isothermal Block is an anodized aluminum, solvent-resistant ... and to provide efficient thermal transfer to ... design of the HT96 Isothermal Block replaces ... product design allowing for compatibility with robotic ...
Biology Products: