spiders

Many spiders reach their maximum size about this time of year, having spent the summer eating, which helps explain their starring role in Halloween decorations. Researchers at the University of California, Davis, have found one particular trapdoor spider, Aptostichus stephencolberti, which is about the size of a quarter, is big in another way: It has an outsized genome.

Scientists at the University of California, Davis, have discovered a new species of trapdoor spider lurking in California’s coastal sand dunes. The newly identified Aptostichus ramirezae is a close relative of Aptostichus simus, a species found along the coast from Monterey to Baja California, Mexico.