From the deserts of hte Southwest comes a reminder that we don't even know all the species in the US - far from it. Would you believe 33 new trapdoor spiders? Arachnologists have gone a little silly with trapdoors lately, naming them for Stephen Colbet, Angelina Jolie, and President Obama, among others. Best name among the new group? Aptostichus sarlacc for the Star Wars creature you might call the ultimate desert-dwelling underground predator.