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 ...

Researchers at this university stumbled upon this trapdoor species, but originally believed it to be Aptostichus simu s. Upon further analysis, they realized that though they appeared to be identical, ...

A rare trapdoor spider, Aptostichus ramirezae, discovered in Iran, features a tail-like appendage, a trait thought extinct ...

Scientists named the half-male, half-female spider after an One Piece anime character who can change sex at will.