Matrilineal Herds (image) University of Illinois at Urbana-Champaign, News Bureau Share Print E-Mail Caption African elephant herds are matrilineal -- only the males disperse. Mitochondrial DNA, which is inherited only from the mother, is an ideal marker for determining the origin of poached ivory, researchers said. Credit Photo by Michael Jeffords and Susan Post Usage Restrictions Image may be used only with stories about the research described in this release. Credit required: Photo by Michael Jeffords and Susan Post Share Print E-Mail 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.