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Flatworms Are Oldest Living Ancestors To Those Of Us With Right And Left Sides, Researchers Report In Science

Date:
March 22, 1999
Source:
American Association For The Advancement Of Science
Summary:
A team of scientists from Spain and the UK has determined that a certain curiously primitive group of flatworms are the oldest living ancestors to all "bilateral" animals-that is, those with a right and left side. These worms were previously thought to belong to a much younger group of organisms, and their newfound identity also implies that bilateral organisms began making their debut on Earth earlier than previously thought.

Washington DC - A team of scientists from Spain and the UK has determined that a certain curiously primitive group of flatworms are the oldest living ancestors to all "bilateral" animals-that is, those with a right and left side. These worms were previously thought to belong to a much younger group of organisms, and their newfound identity also implies that bilateral organisms began making their debut on Earth earlier than previously thought. The finding is reported in the 19 March issue of Science.


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The above story is based on materials provided by American Association For The Advancement Of Science. Note: Materials may be edited for content and length.


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American Association For The Advancement Of Science. "Flatworms Are Oldest Living Ancestors To Those Of Us With Right And Left Sides, Researchers Report In Science." ScienceDaily. ScienceDaily, 22 March 1999. <www.sciencedaily.com/releases/1999/03/990322062150.htm>.
American Association For The Advancement Of Science. (1999, March 22). Flatworms Are Oldest Living Ancestors To Those Of Us With Right And Left Sides, Researchers Report In Science. ScienceDaily. Retrieved April 16, 2014 from www.sciencedaily.com/releases/1999/03/990322062150.htm
American Association For The Advancement Of Science. "Flatworms Are Oldest Living Ancestors To Those Of Us With Right And Left Sides, Researchers Report In Science." ScienceDaily. www.sciencedaily.com/releases/1999/03/990322062150.htm (accessed April 16, 2014).

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