A small team of researchers with members from Thailand, Finland and China, has found that there is a very large and active trade in arachnids across the internet. In their paper published in the journal Communications Biology, ...
A stunning video based on fossils of a 410-million-year-old arachnid – one of the first predators on land – recreates the animal walking.
Archaeology
Jul 8, 2014
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Complex brains evolved much earlier than previously thought, as evidenced by a 520-million year old fossilized arthropod with remarkably well-preserved brain structures. Representing the earliest specimen to show a brain, ...
Archaeology
Oct 10, 2012
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Climbing is possibly one of the riskiest things an adult tarantula can do. Weighing in at anything up to 50gm, the dry attachment systems that keep daintier spiders firmly anchored are on the verge of failure in these colossal ...
Plants & Animals
May 16, 2011
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Modern microscopy technology has allowed two scorpion biologists, Carsten Kamenz of the Humboldt University in Berlin and Lorenzo Prendini of the American Museum of Natural History, to study and document what is nearly invisible. ...
Jan 12, 2009
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Despite their intimidating appearance, the giant yellow and blue-black spiders spreading across the Southeastern U.S. owe their survival to a surprising trait: They're rather timid.
Plants & Animals
May 16, 2023
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Blue-blooded and armored with 10 spindly legs, horseshoe crabs have perhaps always seemed a bit out of place.
Evolution
Mar 9, 2019
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Funnel-web spider venom contains powerful neurotoxins that instantly paralyze prey (usually insects). Millions of years ago, however, this potent poison was just a hormone that helped ancestors of these spiders regulate sugar ...
Plants & Animals
Jun 11, 2015
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In evolutionary biology, there is a deeply rooted supposition that you can't go home again: Once an organism has evolved specialized traits, it can't return to the lifestyle of its ancestors.
Evolution
Mar 8, 2013
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(Phys.org)—While traveling with a group of researchers in the Amazon rain forest this past September, biologist Phil Torres came upon a type of spider he'd never seen before. Upon closer inspection, it turned out the spider ...
Arachnids are a class (Arachnida) of joint-legged invertebrate animals in the subphylum Chelicerata. All arachnids have eight legs, although in some species the front pair may convert to a sensory function. The term is derived from the Greek words ἀράχνη (aráchnē), meaning "spider".
Almost all extant arachnids are terrestrial. However, some inhabit freshwater environments and, with the exception of the pelagic zone, marine environments as well. They comprise over 100,000 named species, including spiders, scorpions, harvestmen, ticks, mites and Solifugae.
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