 "Tylobolus" is the type genus of the subfamily Tylobolinae which includes one other genus, "Hiltonius", occurring from Southern California into Mexico.Of the two, "Tylobolus" is thought to be the more advanced due to more complex genital morphology, and a prominently hooked projection of the third pair of legs in males.Tylobolinae is thought to be more derived than the other subfamily, Spirobolinae.