Green Toads (IMAGE) Forschungsverbund Berlin Caption Bufo shaartusiensis is a toad species from Shaartuz in southern Tajikistan with two sets of chromosomes, i.e. diploid, and has been identified as the maternal ancestor of toads with three sets of chromosomes. Credit Matthias Stoeck Usage Restrictions The image may only be used with appropriate caption or credit 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.