[2] Parachauliodes are differentiated from other genera of fishflies by the presence of bi-lobed ectoproct in males and usually having serrated antenna in both sexes.

[2] Larvae have a pair of respiratory tubes on their dorsal side to enable aerial respiration in poorly oxygenated water.

In some species, males mature faster and leave the water earlier to ensure greater mating success.

[6] The volume of the spermatophore ranges within the genus being large enough to prevent remating by females in P. japonicus white being smaller and decreasing in size more slowly in P.

[7] Adult Megaloptera have been described as dispelling meconial fluids from their anus as a potential defense mechanism, and Parachauliodes produce a much larger volume than other genera.