[1] Protohermes is the most speciose and widely distributed genus within Megaloptera, but up to 85% of species are restricted to small endemic areas in Asia.

Adult Protohermes generally have yellow coloration with white spots on the wings.

[2] The male genitalia are diverse across the genus and can be useful only for species-level identification, especially the shape and size of the tenth tergum and the subgenital plate at the ninth sternum.

Nuptial gifts in Protohermes may as large as 20% of the total body mass of the male and can require up to 2 days to recover before mating again.

[6] Larvae are motionless 90% of the time during the day, but do change position on the stream bed during the night.