1) Animal order 2) Order opiliones 3) Order phalangida 4) Phalangida 1) Phalangida 
Opiliones s (Latin opilio, `shepherd`; formerly Phalangida) is an order of arachnids commonly known as harvestmen. {As of|December 2011}, over 6,500 species of harvestmen have been discovered worldwide, although the total number of extant species may exceed 10,000. The order Opiliones includes four suborders: Cyphophthalmi, Eupnoi, Dyspnoi, and .....
eight-legged invertebrates within the Class Arachnida.