Type Species. Triadocypris spitzbergensis Weitschat 1983 a, by monotypy.
Diagnosis
Carapace oval in lateral outline, rostrum small and slightly overhanging shallow incisure, or with ventral margin forming right angle with anterior edge of valve ventral to incisure. Posterior margin of valve evenly rounded. Adductor muscle scar pattern consisting of two diagonal rows of scars (based on carapace diagnosis in Weitschat 1983 a: 314). Except for having fewer scars, the scar pattern on type species bears some similarity to that of Triadogigantocypris.
Range
Permian of Greece and Triassic (Spitsbergen, North Vietnam).