Jumping Bristletail (image) Max Planck Institute for Chemical Ecology Caption This is a photo of jumping bristletail, Lepismachilis y-signata. The wingless insect has strikingly long antennae, although its sense of smell is not strongly developed. Jumping bristletails belong to the order of Archaeognatha ('ancient jaw'), the most primitive group of insects. They are often found in moist and rocky environments, such as cliffs along coasts. Credit Alexander Schneeberg Usage Restrictions None 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.