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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 ...
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.
This category contains articles about spiders that have a North American native distribution, rather than being limited to particular regions or countries in North America. (Hawaii and other Pacific islands belonging politically to the United States are placed in Category:Spiders of Oceania .)
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]
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.
Maevia intermedia is one of eight species of Salticidae, or jumping spider, in the genus Maevia, and is native to North America. [1] This species was originally reported by American Zoologist Robert D. Barnes in 1955 as a needed distinguishment between the similar-looking Maevia species, especially those found in the Americas.
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 ...
Agelenopsis, commonly known as the American grass spiders, is a genus of funnel weavers described by C.G. Giebel in 1869. [1] They weave sheet webs that have a funnel shelter on one edge. The web is not sticky, but these spiders make up for that by running very rapidly. The larger specimens (depending on species) can grow to about 19 mm in body ...