This video from the USA says about itself:
Trogloraptor – A New family of Spider (photo montage)
Aug 24, 2012
Trogloraptor marchingtoni: This video shows close up images set to music. Stay tuned for a Science in Action video coming soon.
SAN FRANCISCO (August 17, 2012) — A team of scientists and cave conservationists discovered a relatively huge, unique spider in caves and forests of the Pacific Northwest. The novel combination of evolutionary features in this spider, Trogloraptor, compelled them to recognize a new family. A study of the new family and its evolutionary and conservation significance was published in the open access journal ZooKeys on August 17.
The forests of the coastal regions from California to British Columbia are renowned for their unique and ancient animals and plants, such as coast redwoods, tailed frogs, mountain beavers—and now, a large, newly discovered spider. Trogloraptor (or “cave robber”) is named for its cave home and spectacular, elongate claws. It is a spider so evolutionarily special that it represents not only a new genus and species, but also a new family (Trogloraptoridae). Even for the species-rich insects and arachnids, to discover a new, previously unknown family is rare.
A team of citizen scientists from the Western Cave Conservancy and arachnologists from the California Academy of Sciences found these spiders living in caves in southwest Oregon. Colleagues from San Diego State University found more in old-growth redwood forests. Charles Griswold, Curator of Arachnology, Joel Ledford, postdoctoral researcher, and Tracy Audisio, graduate student, all at the California Academy of Sciences, collected, analyzed, and described the new family. Audisio’s participation was supported by the Harriet Exline Frizzell Memorial Fund and by the Summer Systematics Institute at the Academy, which is funded by the National Science Foundation.
Read our story on Science Today here:
Dear Kitty. Some blog 
Scared me a bit…
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Still, the spider is about the size of a half dollar coin 🙂
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It filled my screen…
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A New Family of Spiders—with Claws
The forests of the Pacific Northwest are renowned for their unique and ancient animals and plants, such as coast redwoods, tailed frogs, mountain beavers—and now, a large, newly discovered spider. Trogloraptor (or “cave robber”) is named for its cave home and spectacular, elongate claws. It is a spider so evolutionarily special that it represents not only a new genus and species, but also a new family (Trogloraptoridae). Even for the species-rich insects and arachnids, to discover a new, previously unknown family is rare—it’s been more than 100 years since the description of an entirely new spider family from North America.
Trogloraptor hangs beneath rudimentary webs beneath cave ceilings. It is about four centimeters wide when its legs are extended—larger than the size of a half-dollar coin. Its extraordinary, raptorial claws suggest that it is a fierce, specialized predator, but its prey and attack behavior remain unknown.
A team of citizen scientists and arachnologists found these spiders living in caves in southwest Oregon.
Trogloraptor was not the only new cave spider described in 2012: in another study involving spelunking, Academy scientists and their colleagues described ten new spider species (Tayshaneta spp.) living in central Texas caves.
https://www.sciencedaily.com/releases/2012/12/121207161637.htm
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