Gray oblong body, more than 6 legs, long antennae. Class Turbellaria . 5-30 mm long. Soft flat bodies, cross-eyed, spade shaped head. 10-50 mm long.
Hard limestone shells with toothed hinge.
Ridged triangular shaped shell. 2-250 mm long. Shell with membranous hinge. Order Diptera, Family Ceratopogonidae. 2-15 mm long.