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Spider version of Bigfoot emerges from caves in the Pacific Northwest

Date:
August 17, 2012
Source:
Pensoft Publishers
Summary:
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 the legendary Bigfoot (also known as Sasquatch). Whereas Bigfoot is probably just fiction, a huge, newly discovered spider is very real.

Trogloraptor.
Credit: Image courtesy of Pensoft Publishers

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 the legendary Bigfoot (also known as Sasquatch). Whereas Bigfoot is probably just fiction, a huge, newly discovered spider is very real. 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 an historic moment.

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.

Trogloraptor hangs beneath rudimentary webs on cave ceilings. It is about four centimeters wide when its legs are extended -- larger than the size of a half-dollar coin. Their extraordinary, raptorial claws suggest that they are fierce, specialized predators, but their prey and attack behavior remain unknown.

The anatomy of Trogloraptor forces arachnologists to revise their understanding of spider evolution. Strong evidence suggests that Trogloraptor is a close relative of goblin spiders, but Trogloraptor possesses a mosaic of ancient, widespread features and evolutionary novelties.

The true distribution of Trogloraptor remains unknown: that such a relatively large, peculiar animal could elude discovery until 2012 suggests that more may be lurking in the forests and caves of western North America.


Story Source:

The above story is based on materials provided by Pensoft Publishers. Note: Materials may be edited for content and length.


Journal Reference:

  1. Charles Griswold, Tracy Audisio, Joel Ledford. An extraordinary new family of spiders from caves inthe Pacific Northwest (Araneae, Trogloraptoridae,new family). ZooKeys, 2012; 215 (0): 77 DOI: 10.3897/zookeys.215.3547

Cite This Page:

Pensoft Publishers. "Spider version of Bigfoot emerges from caves in the Pacific Northwest." ScienceDaily. ScienceDaily, 17 August 2012. <www.sciencedaily.com/releases/2012/08/120817092604.htm>.
Pensoft Publishers. (2012, August 17). Spider version of Bigfoot emerges from caves in the Pacific Northwest. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2012/08/120817092604.htm
Pensoft Publishers. "Spider version of Bigfoot emerges from caves in the Pacific Northwest." ScienceDaily. www.sciencedaily.com/releases/2012/08/120817092604.htm (accessed July 22, 2014).

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