The new spider genus and species Trogloraptor marchingtoni Griswold, Audisio & Ledford was described in 2012 as the type of a new family Trogloraptoridae. The oblique membranous division of the basal segment of the anterior lateral spinnerets of Trogloraptor suggests that this haplogyne family is the sister group of the other Dysderoidea (Dysderidae, Oonopidae, Orsolobidae and Segestriidae).
Trogloraptor is known only from caves and old growth forest understory in the Klamath-Siskiyou region of Oregon and California.
