March 15, 2011
It was under the last rock of the day, that scientists finally came face to antennae with the giant crayfish of Shoal Creek. Twice as big as its competitors, the hairy crayfish, which can grow to lobster proportions, was a new species not previously seen.
Parobisium Yosemite was found in the darkness of granite caves in Yosemite National Park. Its venomous claw poisons prey, making it easier to eat. The half inch long creatures are believed to have evolved after the caves were cut off. "The canyon where it was found was made by a glacier during an ice age millions of years ago. Through time, rubble with larger rocks would fall and create piles with caves or subterranean voids. We think that's where this animal was trapped and evolved into the species that it is now,'' says Dr James Cokendolpher, assistant curator of invertebrates at Museum of Texas Tech University.