Palpimanoid Spiders
 
Hannah Marie Wood
 
Mecysmaucheniid chelicerae closing recorded with a high speed camera . . . .
 

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This video (.flv) was recorded at 30,000 frames per second and is being played back at 24 frames per second. This is an adult female mecysmaucheniid species from Chile with extremely fast predatory strikes. The chelicerae are achieving speeds of around 12 meters/second in less than 0.2 milliseconds!
 

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This video (.flv) was recorded at 40,000 frames per second and was still unable to capture the movement of the fastest known trap-jaw spiders! This is a female Zearchaea sp. from New Zealand and her chelicerae are closing in less than two frames and are a blur when examined frame by frame. To see how fast the chelicerae are closing, this species will likely need to be recorded at 50,000 to 60,000 frames per second. Until then, we can say that this species' chelicerae are achieving speeds of greater than 24 meters/second in around 0.1 milliseconds!