<i>Semysmauchenius</i>, Ventral View (VIDEO) Cell Press This video is under embargo. Please login to access this video. Caption This video shows Semysmauchenius, ventral view: this species uses power-amplified cheliceral strikes; this video was recorded at 3,000 frames per second (fps), but is playing at 20 fps, so in real life the movements would be 150 times as fast. Credit H. Wood. Usage Restrictions Credit Required. 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.