Fossil Specimen (IMAGE) American Museum of Natural History Caption The holotype specimen of Senshou lui, which represents a new species of euharamiyidan mammal. It is a nearly complete skeleton that indicates a gracile body with a tail and long fingers that were adapted for an arboreal life in Jurassic forests. Credit ©AMNH/J. Meng Usage Restrictions Can only be used with stories about this <i>Nature</i> paper, with appropriate 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.