Phylogeny of Gyaltsenglossus in the Evolutionary Tree (image) Royal Ontario Museum Share Print E-Mail Caption Simplified phylogeny illustrating where Gyaltsenglossus fits into the evolutionary tree with other hemichordates. This also shows two other fossil hemichordate species Spartobranchus and Oesia. Credit Credit: © Karma Nanglu Usage Restrictions Image use for this story 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.