Diploscapter pachys (image) New York University Share Print E-Mail Caption Pictured is Diploscapter pachys (D. pachys), a newly sequenced roundworm that is approximately one-third of a millimeter long and one of a very few known animals that have only a single chromosome. Credit Image courtesy of Karin Kiontke and David Fitch. Usage Restrictions Use in conjunction with above study only. 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.