Wildlife Gardeners - North American Wildlife Gardening  

Go Back   Wildlife Gardeners - North American Wildlife Gardening > Wildlife Gardeners of North America Unite > Herps

Reply
 
LinkBack Thread Tools Display Modes
Old 02-15-2011, 10:26 AM   #1
The Bug Whisperer
 
suunto's Avatar
 
Join Date: Dec 2008
Location: Monroe County, WV, USA
Default How Snakes Got Legless

BBC News - Studying how snakes got legless

“A 95-million-year-old fossil is helping scientists understand how snakes lost their legs through evolutionary time. Found in Lebanon, the specimen is one of only three examples of an ancient snake with preserved leg bones. One rear leg is clearly visible but researchers had to use a novel X-ray technique to examine another leg hidden inside the fossil rock. Writing in the Journal of Vertebrate Paleontology, the team says the snake records an early stage in limb loss.

Current evidence suggests that snakes started to evolve less than 150 million years ago.

Two theories compete. One points to a land origin in which lizards started to burrow, and as they adapted to their subterranean existence, their legs were reduced and lost - first the fore-limbs and then the hind-limbs. The second theory considers the origin to be in water, from marine reptiles.
This makes the few known bipedal snakes in the fossil record hugely significant, because they could hold the clues that settle this particular debate.”
__________________
“Every artist dips his brush in his own soul and paints his own nature into his pictures.”

Henry Ward Beecher
suunto is offline   Reply With Quote
Reply

Tags
ancient, ancient snakes, bipedal, evolution, evolutionary, evolutionary biology, herp, herps, history, leg bones, legless, legs, lizard, million, origin, research, scientists, snake, snakes, specimen, study, theories, theory, years

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 06:10 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.3.2