Water Spider From 520 Million Years Ago Solves Puzzle
October 17, 2013 Leave a comment
Water Spider From 520 Million Years Ago Solves Puzzle
The fossil of an extinct marine spider, discovered in China 520 million years after it lived in the ocean, have helped scientists solve an ancestral puzzle on where the anthropod fits on the evolutionary map. Using comparisons of central nervous systems, scientists were able to prove that megacheirans, the name given to the extinct group, are related to chelicerates, which include spiders and scorpions, according to a study in the journal Nature today. The findings also show that the 3-centimeter-long (1.2-inch-long) spider’s ancestors branched off from the family tree of other arthropods, which include insects, crabs and millipedes, more than half a billion years ago. Read more of this post





