Trap-door-spider
Guides
Bothriocyrtum
California trap-door spiders
Bothriocyrtum is a genus of mygalomorph spiders in the family Halonoproctidae, established by Eugène Simon in 1891. The genus comprises three recognized species native to North America and Taiwan. These spiders are commonly known as trap-door spiders, constructing burrows with hinged silk-lidded doors. The genus was separated from Cyrtocarenum based on distinct morphological features including eye arrangement and width of separation between certain structures.