Museum Reconstruction of Acanthostega (image) National Evolutionary Synthesis Center (NESCent) Share Print E-Mail Caption This is a photograph of a museum reconstruction of Acanthostega, an early tetrapod. Acanthostega measured about 2 feet (0.6m) in length. Credit Photo courtesy of Jennifer Clack 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.