PHALANGOIDEA

noun ·pl a division of arachnoidea, including the daddy longlegs or harvestman (phalangium) and many similar kinds. they have long, slender, many-jointed legs; usually a rounded, segmented abdomen; and chelate jaws. they breathe by tracheae. called also phalangides, phalangidea, phalangiida, and opilionea.