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The posterior median eyes have excellent night vision, allowing them to cast nets accurately in low-light conditions. These eyes are larger than the others, and sometimes makes these spiders appear to only have two eyes. Ogre-faced spiders are the best known genus in this family. The name refers to the perceived physical similarity to the ...
Deinopis, also known as net-casting spiders, gladiator spiders and ogre-faced spiders, [2] is a genus of net-casting spiders that was first described by W. S. MacLeay in 1839. [3] Its distribution is widely tropical and subtropical.
In order to capture prey flying above it the spider uses a backward striking motion. When prey is outside its field of vision this spider appears to use a sensory organ located on its front legs to sense to prey. This sensory organ is known as the metatarsal organ. During the day, the spider is immobile and camouflages itself on its host palm ...
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The secondary eyes have an inverted retina, meaning the rhabdomeres face away from the incoming light. They also typically have a tapetum made up of crystals, which are likely guanine. [ 3 ] Because incoming light passes through the rhabdomeres both before and after being reflected by the tapetum, the sensitivity of the eyes is essentially ...
5. – Assassin bug vs. Ogre-faced spider 4. – Desert centipede vs. Desert trapdoor spider 3. – Giant rainforest mantis vs. Spiny leaf insect 2. – Green jumping spider vs. Long-jawed jumping spider 1. – Tree scorpion vs. Green ant
It is also highly elastic, the silk of the ogre-faced spider can be stretched six times its original length without damage. As of 2005, there is no synthetic material in production that can match spider silk, but it is actively being sought by the U.S. military for such applications as body armor, parachutes and rope. [1]
Members of Predatoroonops are small, ranging from 1.8 to 2.1 mm (0.071 to 0.083 in) in size. [4] They are distinguished by the projected and articulated chelicerae of the males, the conspicuous posterior receptacle of the genitalia of the females, and the spines with pronounced bases on the legs of both sexes. [1]