Diastylis is a genus of crustaceans which belong to the family Diastylidae. It includes the following species: \n* Diastylis abboti Gladfelter, 1975 \n* Diastylis abbreviata G. O. Sars, 1871 \n* Diastylis acuminata Jones, 1960 \n* Diastylis alaskensis Calman, 1912 \n* Diastylis algoae Zimmer, 1908 \n* Diastylis ambigua Le Loeuff & Intes, 1972 \n* Diastylis anderssoni Zimmer, 1907 \n* Diastylis antillensis Sars, 1873 \n* Diastylis araruamae Petrescu & Bacescu, 1991 \n* Diastylis argentata Calman, 1912 \n* Diastylis aspera Calman, 1912 \n* Diastylis bidentata Calman, 1912 \n* Diastylis bispinosa (Stimpson, 1853) \n* Diastylis boecki Zimmer, 1930 \n* Diastylis bradyi Norman, 1879 \n* Diastylis brasilianus Bacescu & Petrescu, 1991 \n* Diastylis calderoni Donath-Hernandez, 1988 \n* Diastylis californica Zimmer,