Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The secret of the turtle shell

14.07.2009
A team of Japanese scientists has uncovered anatomical clues charting the developmental path by which the turtle acquired its shell.

The evolutionary riddle of the turtle shell is one step closer to being solved thanks to groundbreaking research published this week in Science. A team of Japanese scientists has uncovered anatomical clues charting the developmental path by which the turtle acquired its shell.

Turtle morphology poses a unique puzzle in that the turtle's scapulae (shoulder blades), situated outside the ribs in other animals, are found inside its shell (which is formed from the bones equivalent to ribs in other species). To explain this inside-out skeletal morphology, researchers at the Laboratory for Evolutionary Morphology of the RIKEN Center for Developmental Biology compared embryonic development of the turtle to that of chicken and mice. While muscles and skeletons initially developed in a similar way, turtle embryo development diverged at a late stage, with the ventral part of the body wall folding inwards together with the scapula, a step made possible by the anatomical layout of the turtle embryo.

Their findings also indicate a resemblance between the early form of the turtle embryo and that of Odontochelys, a 220 million-year-old fossil species unearthed in China last year, believed to represent the ancestor of all modern turtles. Based on their results, the research group has concluded that modern turtle anatomy results from the late development of ribs in an Odontochelys-like ancestor, unraveling the long-standing mystery of the turtle and its shell.

For more information, please contact
Dr. Hiroshi Nagashima
Laboratory for Evolutionary Morphology
RIKEN Center for Developmental Biology
Tel: +81-78-306-3064 / Fax: +81-78-306-3370
Ms. Saeko Okada (PI officer)
Global Relations Office
RIKEN
Tel: +81-48-462-1225 / Fax: +81-48-467-9443
Mail: koho@riken.jp

Saeko Okada | Research asia research news
Further information:
http://www.riken.go.jp/engn/r-world/info/release/press/2009/090710/index.html

More articles from Life Sciences:

nachricht Toward a 'smart' patch that automatically delivers insulin when needed
18.01.2017 | American Chemical Society

nachricht 127 at one blow...
18.01.2017 | Stiftung Zoologisches Forschungsmuseum Alexander Koenig, Leibniz-Institut für Biodiversität der Tiere

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

A big nano boost for solar cells

18.01.2017 | Power and Electrical Engineering

Glass's off-kilter harmonies

18.01.2017 | Materials Sciences

Toward a 'smart' patch that automatically delivers insulin when needed

18.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>