Scorpion Book Lung Spiracle (IMAGE) American Museum of Natural History Caption Pictured is the movable posterior edge of spiracle with ridged subconical structures in Vaejovis spinigerus (30 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.