The Harvestmen (Opiliones) - order
(Cyphophthalmi) - suborder
(Boreophthalmi) - infraorder

(Sironidae)

(Stylocellidae)
(Scopulophthalmi) - infraorder

(Pettalidae)
(Sternophthalmi) - infraorder

(Troglosironidae)

(Neogoveidae)

(Ogoveidae)
(Eupnoi) - suborder
(Caddoidea) - superfamily

(Caddidae)
- family
(Phalangioidea) - superfamily

(Monoscutidae)
- family

(Neopilionidae)
- family

(Sclerosomatidae)
- family

(Stygophalangiidae)
- family

(Phalangiidae)
- family

(Protolophidae)
- family
(Dyspnoi) - suborder
(Ischyropsalidoidea) - superfamily

(Ceratolasmatidae)

(Ischyropsalididae)

(Sabaconidae)

(Taracidae)
(Troguloidea) - superfamily

(Dicranolasmatidae)

(Eotrogulidae)

(Nemastomatidae)

(Nipponopsalididae)

(Trogulidae)
(Laniatores) - suborder
(Travunioidea) - superfamily

(Nippononychidae)
- family

(Paranonychidae)
- family

(Travuniidae)
- family
(Triaenonychoidea) - superfamily

(Synthetonychiidae)
- family

(Triaenonychidae)
- family
(Epedanoidea) - superfamily

(Epedanidae)
- family
(Phalangodoidea) - superfamily

(Oncopodidae)
- family

(Phalangodidae)
- family

(Pyramidopidae)
- family
(Samooidea) - superfamily

(Biantidae)
- family

(Escadabiidae)
- family

(Kimulidae)
- family

(Podoctidae)
- family

(Samoidae)
- family

(Stygnommatidae)
- family
(Zalmoxoidea) - superfamily

(Escadabiidae)
- family

(Fissiphalliidae)
- family

(Guasiniidae)
- family

(Icaleptidae)
- family

(Kimulidae)
- family

(Zalmoxidae)
- family
(Gonyleptoidea) - superfamily

(Agoristenidae)
- family

(Cosmetidae)
- family

(Cranaidae)
- family

(Gonyleptidae)
- family

(Manaosbiidae)
- family

(Stygnidae)
- family
(Tetrophthalmi) - suborder

(Eophalangium)
- genera

(Hastocularis)
- genera