T-Rex linked to birds: StudyApril 25th, 2008 - 5:47 pm ICT by admin
Washington, April 25 (IANS) The fearsome T-Rex sharing a common ancestry with something as tiny and timid as chickens would have been laughed out of hand. But the latest evidence, based on molecular analysis of a shred of 68 million-year T-Rex protein, bears out its close kinship with the modern-day bird.
The work represents the first use of molecular data to place a non-avian dinosaur in a phylogenetic (evolutionary) tree that traces the evolution of species.
The scientists also report that similar analysis of 160,000 to 600,000-year-old collagen protein sequences derived from mastodon bone establishes a close evolutionary relationship between that extinct species and modern elephants.
“These results match predictions made from skeletal anatomy, providing the first molecular evidence for the evolutionary relationships of a non-avian dinosaur,” said co-author Chris Organ, of Harvard University.
For the current work, Organ and John Asara and their colleagues used sophisticated algorithms to compare collagen protein from several dozen species. The goal: placing T-Rex on the animal kingdom’s family tree using molecular evidence.
“We determined that T-Rex, in fact, grouped with birds - ostrich and chicken - better than any other organism that we studied. We also show that it groups better with birds than modern reptiles, such as alligators and green anole lizards, said Asara.”
The scraps of dinosaur protein were wrested from a fossil femur discovered in 2003 by John Horner of the Museum of the Rockies in a barren fossil-rich stretch of land that spans Wyoming and Montana.
- T Rexs ancestors were chickens and ostriches - Apr 25, 2008
- One-fingered dinosaur unearthed in China - Jan 25, 2011
- Dinos' evolving beaks were like 'Swiss Army knives' - Dec 21, 2010
- Tyrannosaurus Rex Revealed To Be Cannibals - Oct 18, 2010
- T-Rex's gigantic cousin located in China - Apr 01, 2011
- Some non-avian feathered dinos may have been flightless birds - Jan 10, 2010
- T. rex hunted like a lion, did not scavenge like a hyena - Jan 26, 2011
- For 80mn years, Tyrannosaurs were the size of humans - Sep 17, 2010
- Fossils of bird-like dinosaurs discovered in Australia - May 18, 2012
- T. rex protein may have contained traces of ostrich rather than chicken - Feb 28, 2009
- Dinosaurs probably had lice: Study - Apr 06, 2011
- New analysis confirms biochemical remains of T. rex - Jul 30, 2009
- Traces of protein found in T. rex remains - Jul 30, 2009
- Protein from 600,000-year-old mammoth sheds light on ancient fossils - Mar 31, 2011
- Scientist unravels secret of T.rex's fearsome snarl - Mar 19, 2012
Tags: anole, asara, author chris, chris organ, collagen protein, dozen species, evolutionary relationship, evolutionary relationships, evolutionary tree, extinct species, green anole, green anole lizards, harvard university, john horner, molecular evidence, museum of the rockies, protein sequences, skeletal anatomy, sophisticated algorithms, t rex