Bothriocyrtum californicum, the California trapdoor spider, is a species of spider in the family Halonoproctidae.

It is found in the United States.

[1] Males are smaller than females.

[2] Predators include the spider wasp Psorthaspis planata, which use their bodies as larval nurseries, and skunks, which dig up their burrows.

This Halonoproctidae-related article is a stub.