Aptostichus ramirezae Content / Aptostichus ramirezae Content for UC Davis en New Species of Spider Discovered, Just in Time for Halloween /climate/news/new-species-spider-discovered-just-time-halloween UC Davis scientists have discovered a new species of trapdoor spider in California's coastal sand dunes. October 29, 2025 - 9:24am Amy M Quinton /climate/news/new-species-spider-discovered-just-time-halloween