Scorpion Book Lung Lamella (IMAGE) American Museum of Natural History Caption This is the ventral surface of book lung lamella with branched trabeculae in Opisthacanthus elatus (3 µm). Credit C. Kamenz Usage Restrictions None 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.