Page last updated at 00:02 GMT, Wednesday, 5 August 2009 01:02 UK

Ancient spiders yield 3D secrets

Advertisement

3D models detail ancient spiders

Ancient fossilised, spider-like species have been imaged in 3D using thousands of X-ray scans and imaging software.

The two species, Cryptomartus hindi and Eophrynus prestvicii, lived 300 million years ago but are closely related to modern spiders.

The 3D images show that C. hindi grasped at prey with its front legs and E. prestivicii had defensive spikes on its back.

The results are published in the journal Biology Letters.

The 3D images were obtained by using a computed tomography scanner - a device that can take X-ray images from many angles.

Some 3,000 images of each fossil were obtained, and a custom software package developed at Imperial College London was used to assemble the images into a single, detailed, 3D virtual model of the creatures.

Defensive measures

Those 3D images revealed new detail that previous fossil studies of the animals had not revealed.

C. hindi's front pair of legs, the team found, were angled toward the front, suggesting they were used to grapple with prey.

The researchers suggest that the animal probably was an "ambush predator" like the modern-day crab spider, lying in wait for prey to come close.

Another finding from the models is that E. prestivicii had hard spikes along its back, probably as a defensive measure making it less palatable to the amphibians that would have hunted it.

"Our models almost bring these ancient creatures back to life and it's really exciting to be able to look at them in such detail," said Imperial College London researcher Russel Garwood, lead author on the research.

"Our study helps build a picture of what was happening during this period early in the history of life on land."

The technique could be used to return to fossils that have already been analysed by conventional means, the researchers said.



Print Sponsor


SEE ALSO
Early sea spider flashes pincers
21 Oct 04 |  Science & Environment
Tiny spider 'digitally dissected'
29 Oct 07 |  Science & Environment
Tiny fossils reveal inner secrets
13 Oct 06 |  Science & Environment

RELATED INTERNET LINKS
The BBC is not responsible for the content of external internet sites


FEATURES, VIEWS, ANALYSIS
Has China's housing bubble burst?
How the world's oldest clove tree defied an empire
Why Royal Ballet principal Sergei Polunin quit

BBC navigation

BBC © 2013 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.

Americas Africa Europe Middle East South Asia Asia Pacific