Placental Species Heterandria formosa (image) University of California - Riverside Share Print E-Mail Caption This is placental species Heterandria formosa. Note the lack of sexual dichromatism. Credit Chiara Sciarone Usage Restrictions None 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.