BBC NEWS Americas Africa Europe Middle East South Asia Asia Pacific Arabic Spanish Russian Chinese Welsh
BBCi CATEGORIES   TV   RADIO   COMMUNICATE   WHERE I LIVE   INDEX    SEARCH 

BBC NEWS
 You are in: Sci/Tech
Front Page 
World 
UK 
UK Politics 
Business 
Sci/Tech 
Health 
Education 
Entertainment 
Talking Point 
In Depth 
AudioVideo 


Commonwealth Games 2002

BBC Sport

BBC Weather

SERVICES 
Friday, 9 November, 2001, 13:47 GMT
Largest fossil cockroach found
Fossil: Ohio State University
The fossil, found in eastern Ohio, US, compared with a modern roach
The largest complete fossil of a cockroach has been found in the United States.

The insect, about the size of a mouse, lived 55 million years before the first dinosaurs walked the planet.

Fossil: Ohio State University
Wings, mouthparts and antennae are visible
The specimen, from a time when some of the land was a giant tropical swamp, was unearthed in a coalmine in eastern Ohio.

Scientists say the discovery could shed light on the diversity of ancient life and how the Earth's climate has changed throughout history.

Cary Easterday, a geologist at Ohio State University, was among the team that found the fossil.

"Normally, we can only hope to find fossils of shell and bones, because they have minerals in them that increase their chances for preservation," he said.

"But something unusual about the chemistry of this ancient site preserved organisms without shells or bones in incredible detail."

Cary Easterday: Ohio State University
Cary Easterday examines his find
Scientists are unsure what caused such intricate features to be preserved at the mine, which also contains the fossil of the earliest known conifer in the Appalachian Basin.

But they hope it could yield clues to how ancient plants and animals coped with a changing environment.

At the time, 300 million years ago, during the Carboniferous period, the swamp was rapidly drying out.

The cockroach, which is nine centimetres (3.5 inches) long, has visible legs, antennae and mouth parts.

Veins can be seen on its wings as well as fine bumps covering the wing surface.

Mine: Ohio State University
The mine where the fossil was found also contains important plant specimens
The creature is about twice the size of the average cockroach found today in North America. Some modern cockroaches living in the tropics can grow bigger.

The cockroach was found at the mine by the fossil collector Gregory McComas and loaned to Mr Easterday for study.

Details of the find were presented on Wednesday at the annual meeting of the Geological Society of America in Boston.

See also:

16 Jul 00 | Sci/Tech
Biting beetle gives away secrets
Internet links:


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

Links to more Sci/Tech stories are at the foot of the page.


E-mail this story to a friend

Links to more Sci/Tech stories