<I>Schmidtea mediterranea</I> (IMAGE) University of California - San Francisco Caption The freshwater flatworm Schmidtea mediterranea lives in southern Europe and Northern Africa is the first animal ever discovered without a crucial structure inside its cells known as the centrosome. Credit UCSF/J.Azimzadeh Usage Restrictions List image credit: UCSF/J.Azimzadeh License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.