HOME >> BIOLOGY >> NEWS
Fossil discovery marks earliest record of limbloss in ancient lizard

ample of paleontological data being used to elucidate the potential molecular genetic causes of a major evolutionary transition, said Dr. Martin Cohn, from the Department of Zoology and University of Florida Genetics Institute.

"This is a terrifically important discovery because it shows, in a group of animals thought to be closely related to snakes, that forelimb reduction and trunk elongation were well underway before the onset of hindlimb reduction," said Cohn. "By uncovering the sequence of the morphological changes that occurred during evolution of a snake-like body plan, Palci and Caldwell's study provides important clues as to which developmental mechanisms could have been involved."

The researchers think this snake-like lizard was about 10 to 12 inches long, had a small head perched on an elongated neck, body and tail and relatively large and well-developed rear limbs. All bones of the forearm, including the hands and digits were not formed during development.

"For some oddball reason the forelimbs were lost before the rear limbs when you would think it would be the opposite," said Caldwell. "The front limbs would be useful for holding onto dinner or digging a hole but it must be developmentally easier to get rid of the forelimbs."

The most well known ancient fossil snakes also kept their hind limbs. Living lizards also show almost every variation in limb reduction from a perfectly formed back limb with no forelimb, or a spike for a forelimb and one or two toes on the rearlimb, to total limblessness. This degree of variation makes it very difficult to understand the pattern of evolutionary limb loss in these animals.

"This discovery is one more data point that might help us answer some questions and perhaps shed some light on the fin to limb transition, which is a key step in the evolution of land animals," said Caldwell. "It doesn't give us all the answers but it's a start."


'"/>

Contact: Phoebe Dey
phoebe.dey@ualberta.ca
780-492-0437
University of Alberta
22-Mar-2007


Page: 1 2 3

Related biology news :

1. Fossil DNA illuminates life
2. Fossils of ancient sea monster found in Montana
3. Fossil is missing link in elephant lineage
4. Fossilized liquid assembly: Nanomaterials research tool
5. Fossils pinpoint tropics as Earths most fruitful biodiversity spawning ground
6. Early bird caught the fish: Fossils depict aquatic origins of birds 115 million years ago
7. Fossil wood gives vital clues to ancient climates
8. Fossils tell the hole story of killer drillers and their prey
9. Fossil Patagonian plants show high insect feeding diversity 52 million years ago
10. Fossil records show biodiversity comes and goes
11. Enzyme discovery sheds light on vitamin D

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/14/2017)... IBM ) is introducing several innovative partner startups at ... between startups and global businesses, taking place in ... startups will showcase the solutions they have built with IBM ... France is one of the most ... increase in the number of startups created between 2012 and ...
(Date:5/6/2017)... 2017 RAM Group , Singaporean ... breakthrough in biometric authentication based on a ... to perform biometric authentication. These new sensors are based ... by Ram Group and its partners. This sensor will ... chains and security. Ram Group is a next ...
(Date:4/17/2017)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the "Company"), ... Report on Form 10-K on Thursday April 13, 2017 with the ... The ... section of the Company,s website at http://www.nxt-id.com  under "SEC Filings," ... 2016 Year Highlights: Acquisition of ...
Breaking Biology News(10 mins):
(Date:8/23/2017)... , ... August 23, 2017 , ... ... systems and academic medical centers. The network provides members nationally scaled infrastructure and ... and biologics and restrictive payer agreements so members can provide continuity of care ...
(Date:8/22/2017)... MA (PRWEB) , ... August 22, 2017 , ... ... new service pipeline built upon patented KBioBox technology, the extended GUIDE-Seq ananlysis. KBioBox ... source GUIDE-Seq computation pipeline to be provide scientists with easy to understand reports, ...
(Date:8/21/2017)... ... August 21, 2017 , ... Finalists have recently been selected ... that have implemented innovative products, services, and technology over the past year. The ... impact/value, and market need. The applicants with the top three scores in each ...
(Date:8/21/2017)... ... August 21, 2017 , ... The team at ... educational webinar, in which attendees will learn about the assembly and topological architecture ... with an overview of the development and validation of new high-quality recombinant monoclonal ...
Breaking Biology Technology:
Cached News: