Please note that while Yosemite remains open during the federal government shutdown, services and facilities are very limited, and certain areas of the park are closed. For more information, please refer to the National Park Service and the Department of the Interior: visit and

As the impact of the government shutdown continues to be felt, Yosemite Conservancy remains committed to supporting Yosemite National Park.

Click here for more information on the availability of Yosemite Conservancy programs and services during the shutdown.

Discovering the Pseudoscorpion

Discovering the Pseudoscorpion

Anyone who has been to Yosemite knows the park is a dynamic place. From waterfalls to rockfalls, the park’s landscape is always changing and forming new habitats for thousands of plant and animal species.

Discovering the Pseudoscorpion

Throughout millions of years, rockfalls have lined the base of Yosemite Valley with jumbles of boulders and smaller debris that form “talus” caves. In 2010, park biologists discovered a new pseudoscorpion species, called the Yosemite Cave Pseudoscorpion, crawling within these talus caves. About the length of a fingernail, this arachnid resembles a true scorpion but does not possess a stinger or tail. The pseudoscorpion is so adapted to the darkness of its cave habitat that it doesn’t even need eyes!

Continuing to Explore Cave Habitat

This Conservancy-funded discovery is exciting for scientists as they continue to explore other remote regions of the park for undiscovered species. Park biologists have made these rockfall caves a priority for further exploration of additional pseudoscorpion species.

Thanks to your dedicated support, we contributed vital funding for important fieldwork that led to the discovery of a new species.

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