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A spider web preserved in amber, thought to be 110 million years old, shows evidence of a perfect "orb" web, the most famous, circular kind one thinks of when imagining spider webs. An examination of the drift of those genes thought to be used to produce the web-spinning behavior suggests that orb spinning was in an advanced state as many as ...
Baby spiders pass all their larval stages inside the egg sac and emerge as spiderlings, very small and sexually immature but similar in shape to adults. Some spiders care for their young, for example a wolf spider's brood clings to rough bristles on the mother's back, [13] and females of some species respond to the "begging" behaviour of their ...
Bolas spiders are defined by the way in which adults catch their prey. Like other members of the subfamily Cyrtarachninae sensu lato , bolas spiders specialize in catching moths . The scales covering moth wings are detachable, so that most ordinary orb webs are not effective at capturing moths.
You won’t believe just how big some spiders can get! Watch our video spotlighting the ten biggest spiders on earth with some walking on legs over a foot in width.
This suborder is thought to form the sister group to all other living spiders, and to retain ancestral characters, such as a segmented abdomen with spinnerets in the middle and two pairs of book lungs. Extant members of the Mesothelae are medium to large spiders with eight eyes grouped on a tubercle.
Mastophora hutchinsoni, also known as the American bolas spider, is a species of orb weaver in the genus Mastophora. The genus is distributed extensively throughout various subtropical geographical areas including Australia, South Africa, Oriental Asia, and the Americas and is not found in Europe.
With so many kinds of eight-legged bugs running around (nearly 3,000 species in North America alone!), the most common house spiders are bound to pop up in your abode from time to time. And with ...
Ancylometes is a genus of Central and South American semiaquatic spiders first described by Philipp Bertkau in 1880. [4] Originally placed with the nursery web spiders, it was moved to the Ctenidae in 1967 and in 2025 transferred to the new family Ancylometidae, [5] of which it is the only member. [2]