Navigation Links
Tracking turtles through time, Dartmouth-led study may resolve evolutionary debate
Date:5/5/2014

Turtles are more closely related to birds and crocodilians than to lizards and snakes, according to a study from Dartmouth, Yale and other institutions that examines one of the most contentious questions in evolutionary biology.

The findings appear in the journal Evolution & Development. A PDF of the study is available on request.

The research team looked at how the major groups of living reptiles, which number more than 20,000 species, are interrelated. The relationships of some reptile groups are well understood -- birds are most closely related to crocodilians among living reptiles, while snakes, lizards and New Zealand's tuatara form a natural group. But the question of how turtles fit into this evolutionary picture has remained unclear. Are turtles more closely related to archosaurs (birds and crocodilians) or to lepidosaurs (lizards, snakes and tuatara)? Or are these other reptiles more closely related to each other than to turtles?

A growing number of studies examining DNA sequences have suggested a close evolutionary kinship between turtles and archosaurs, but those results were contradicted by anatomical studies and a recent study of small biomolecules called microRNAs. Because microRNAs are viewed by some as excellent evolutionary markers, the conflict between the microRNA and DNA results meant the turtle-archosaur link was viewed skeptically by many.

But the Dartmouth-led team's research suggests the earlier microRNA conclusions were erroneous, and instead indicates that microRNAs and DNA sequences yield a common signal -- that turtles share a more recent common ancestor with birds and crocodilians than with lizards and snakes.


'/>"/>

Contact: John Cramer
John.Cramer@Dartmouth.edu
603-646-9130
Dartmouth College
Source:Eurekalert  

Page: 1

Related biology news :

1. Tracking sugar movement in plants
2. Tracking neighborhood eating habits to promote healthier diets
3. Tracking catalytic reactions in microreactors
4. Nitrogen-tracking tools for better crops and less pollution
5. Tracking Asian air pollution aids policymakers
6. 9 and 60 ways of particle tracking
7. Gold nanoparticles help to develop a new method for tracking viruses
8. Tracking the deep sea paths of tiger sharks
9. Patch outperforms Holter for prolonged heart rhythm tracking
10. Tracking young salmons first moves in the ocean
11. A Turnkey Solution Measures Cognitive Workload with SMI Eye Tracking
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Tracking turtles through time, Dartmouth-led study may resolve evolutionary debate
(Date:11/24/2016)... -- Cercacor today introduced Ember TM Sport Premium ... measure hemoglobin, Oxygen Content, Oxygen Saturation, Perfusion Index, ... approximately 30 seconds. Smaller than a smartphone, using only ... key data about their bodies to help monitor these ... Hemoglobin carries oxygen to muscles. When hemoglobin and ...
(Date:11/22/2016)... 22, 2016   MedNet Solutions , an innovative ... of clinical research, is pleased to announce that the ... and Life Sciences Awards as "Most Outstanding in ... unprecedented year of recognition and growth for MedNet, which ... years. iMedNet ™ , MedNet,s ...
(Date:11/19/2016)... Nov. 18, 2016 Securus Technologies, a leading ... public safety, investigation, corrections and monitoring, announced today that ... ICSolutions, to have an independent technology judge determine who ... modern high tech/sophisticated telephone calling platform, and the best ... they do most of what we do – which ...
Breaking Biology News(10 mins):
(Date:11/30/2016)... ... November 30, 2016 , ... Energetiq ... applications, introduces the 5th generation, ultra-bright, Laser-Driven Light Source, the EQ-77, at the ... (LDLS™) technology, the EQ-77 offers higher radiance and irradiance from a truly broadband ...
(Date:11/30/2016)... Carolina (PRWEB) , ... November 30, 2016 , ... On ... names and symbols for four elements: nihonium (Nh), moscovium (Mc), tennessine (Ts), and ... period of public review, the names earlier proposed by the discoverers have been approved ...
(Date:11/30/2016)... Toronto, ON (PRWEB) , ... November 30, 2016 ... ... focused on discovery and development of precision treatments for neurodegenerative diseases, today announced ... disease (AD) (announced on November 3, 2016) blocked propagation of toxic, prion-like forms ...
(Date:11/30/2016)... -- Teil einer Investition von 5 Millionen ... ... Aptuit LLC hat heute bekannt gegeben, ... neuartige Substanzen haben die Prüfsammlung auf über 400.000 erhöht. ... Entdeckungsfähigkeiten des Unternehmens zu erweitern. Die Ausweitung, die durch ...
Breaking Biology Technology: