Navigation Links
Details of evolutionary transition from fish to land animals revealed

New research has provided the first detailed look at the internal head skeleton of Tiktaalik roseae, the 375-million-year-old fossil animal that represents an important intermediate step in the evolutionary transition from fish to animals that walked on land.

Results of the study, published in this week's issue of the journal Nature, show that the transition from aquatic to terrestrial lifestyle involved complex changes not only to appendages (fins to limbs) but also to the internal head skeleton.

"Exquisite specimens of Tiktaalik roseae discovered several years ago continue to function as rosetta stones for understanding the emergence of quadripeds on land," said H. Richard Lane, program director in the National Science Foundation (NSF)'s Division of Earth Sciences, which funded the research.

A team co-led by scientist Ted Daeschler at the Academy of Natural Sciences in Philadelphia discovered Tiktaalik roseae (tik-TAHL-ik RO-zay) in 2004, in Devonian-age rock on Ellesmere Island in Canada, more than 700 miles above the Arctic Circle.

The creature was a large aquatic predator with a flattened head and body.

The body plan and nature of the deposits where the fossils were found suggest an animal that lived on the bottom in shallow water, and perhaps out of the water for short periods.

Tiktaalik roseae has features of the skull, neck, ribs and appendages that are shared with the earliest limbed animals (tetrapods), as well as fishlike features such as scales and fin rays. This mosaic of features makes it a textbook example of a transitional fossil, say paleontologists.

Jason Downs, a scientist at the Academy of Natural Sciences and lead author of this week's paper, said the examination of the internal head skeleton further demonstrates the intermediacy of Tiktaalik roseae.

"The braincase, palate and gill arches of Tiktaalik help re

Contact: Cheryl Dybas
National Science Foundation

Page: 1 2

Related biology news :

1. Study reveals surprising details of the evolution of protein translation
2. Researchers uncover details about how dietary restriction slows down aging
3. Biochemists reveal details of mysterious bacterial microcompartments
4. Revealing the evolutionary history of threatened sea turtles
5. Illuminating biology: An evolutionary perspective
6. Milkweeds evolutionary approach to caterpillars: Counter appetite with fast repair
7. Revolutionary chefs? Not likely, shows physics research
8. Crossed (evolutionary) signals?
9. Mechanism and function of humor identified by new evolutionary theory
10. Revolutionary CO2 maps zoom in on greenhouse gas sources
11. M2SYS Introduces Revolutionary Biometric Artificial Intelligence Technology to Significantly Reduce Fingerprint Software False Reject Rates
Post Your Comments:
Related Image:
Details of evolutionary transition from fish to land animals revealed
(Date:9/30/2015)... YORK , Sept. 30, 2015  The global glucose ... billion for 2015. So says a new report on the ... diabetes management segment dominate the market, followed by continuous glucose ... publisher. Kalorama reports on the market for these products in its ... ...
(Date:9/28/2015)... Sept. 28, 2015 CLEAR, the ... its expedited traveler service is coming to ... travel, bringing a frictionless experience, serious speed ... "CLEAR offers our travelers an expedited ... said Jim Smith , Executive Director, ...
(Date:9/28/2015)... 2015 According to a new ... Product (Scanner & Others), Application (Access Control & Others), ... & Geography Global - Forecast to 2020", published by MarketsandMarkets, ... 3627.90 Million by 2020, at a CAGR of 23.40% ... market data T ables and 66 ...
Breaking Biology News(10 mins):
... Testing people for heart disease might be just a finger ... by a team of researchers from Harvard and Northeastern universities ... FASEB Journal ( ), they describe how ... needed to build vascular tissue, called endothelial progenitor cells, using ...
... Boston, MA June 1, 2009 REGiMMUNE ... in combination with a low-dose of Sirolimus, demonstrated enhanced ... transplantation and acute Graft-versus-Host disease (GvHD). This data ... Tolerance Induction by a Liposomal Formulation of KRN7000 (RGI-2001) ...
... species are likely to respond to climate change. Most ... and the interactions between species, in the interest of ... BioScience , by Eric Post of Pennsylvania State University ... avoided. Their approach, which relies on multi-stage analyses of ...
Cached Biology News:
(Date:10/7/2015)... Boston Scientific (NYSE: BSX ... Boston Scientific Connected Patient Challenge , an open innovation ... remote patient monitoring to enhance patient care.  Until January ... their ideas and collaborate on solutions through Medstro,s ... Cambridge, MA where they will present ...
(Date:10/7/2015)... 7, 2015  ChromaDex Corp. (OTCQX: CDXC), an ... that creates science-based solutions for dietary supplement, food ... products, today announced that the October 1 presentation ... is now available for on-demand viewing at ...   --> LINK: ...
(Date:10/7/2015)... , Oct. 7, 2015  October is National Liver Awareness ... committed to donating a portion of its October profits ... hepatology practices. ... a variety of ways; whether it is by providing ... collaborating with researchers in different disease and investigation areas, ...
(Date:10/7/2015)... Santa Clara, CA (PRWEB) , ... October 07, ... ... force microscopy (AFM) today announced a webinar titled Smart Nanostructured Coatings to provide ... Oct 15, 2015. Register for this free webinar at . This ...
Breaking Biology Technology:
... a firm that makes high-power lasers for industrial, defense, ... Chinese distributor Sanetronic Company Limited . , ,Sanetronic's ... was founded in 1987 as an international distributor of ... China, including Beijing, Shanghai, Shenzhen, Wuhan, and Chengdu. , ...
... The Joint Finance Committee rejected Governor Jim Doyle's proposal for ... The proposal, a plan to charge consumers for their music, ... several proposals turned down by the budget review panel. , ... on electronic entertainment called by some detractors the "iPod ...
... to unite the research efforts of southeast Wisconsin received ... for $2.5 million in research capital. , ,The Legislature's ... to the Biomedical Technology Alliance, an organization of five ... by Senator Ted Kanavas of Brookfield, will ...
Cached Biology Technology:
... ZMD.437. Immunogen: Synthetic peptide derived from ... and rat ZO-1. Specificity: Specific for ... protein. Reactivity: Human Dog Rat Mouse ... cells frozen mouse liver heart blood vessel ...
Human/Mouse APLP-1 MAb (Clone 354020) ENTREZ GeneID: 333...
... glycoprotein ligand-1 (PSGL-1) mediate the earliest rolling ... endothelial cells at sites of inflammation. ... in mediating the interaction between neutrophils and ... recognition of PSGL-1 by either P-selectin or ...
Biology Products: