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Ancient blob-like creature of the deep revealed by scientists
Date:8/4/2010

on Earth may have resembled and how their bodies evolved. Some scientists think the creatures had repeated units, similar to a caterpillar with its many segments and legs, while others think that their bodies were structured in more free-form ways, similar to slugs.

In today's study, the researchers analysed their 3D model and discovered that Drakozoon had eight deep ridges on either side of its body. They suggest that these deep ridges are the genetic remnants from a time when Drakozoon had a body made of repeated units, supporting the theory that the earliest creatures on Earth were also made of repeated units.

The study shows that Drakozoon was an early member of a major group of invertebrate species called lophophorates. The best known lophophorates are the brachiopods, a type of spineless shellfish that are some of the most common fossils from the Silurian Period. The team found their Drakozoon specimen clinging onto the fossilised shell of a brachiopod.

The researchers created their 3D model by physically slicing a fossil into 200 pieces. These pieces were individually photographed and the images were fed into a computer, which generated the 3D model for analysis by the scientists.

The researchers say it is very rare to find ancient soft bodied creatures intact because they normally decompose before they can be preserved in sediment. The soft bodied Drakozoon was perfectly preserved because it lived in an area that was covered in volcanic ash, following a volcanic eruption that instantly entombed it and other creatures living with it, keeping it intact for 425 million years.


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Contact: Colin Smith
cd.smith@imperial.ac.uk
44-207-594-6712
Imperial College London
Source:Eurekalert

Page: 1 2

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