Mecysmaucheniidae spiders are tiny – the smallest has a body length of less than 0.08 inches – yet they are formidable super-fast predators. Native to New Zealand and South America, these “trap-jaw” spiders are the fastest-known arachnids so far. Compared with other spiders, their jaws, called chelicerae, are more elongated and manoeuvrable, while their frontal region, the carapace, almost appears necklike. The spiders keep their jaws open while hunting, snapping them closed when they encounter prey. The fastest could snap their jaws shut in 0.12 milliseconds; the smaller the species, the faster its jaw-snapping capabilities. It could be that the quickest spiders evolved their lightning-fast attack so that they could target speedier prey.
Picture Credit : Google