 In "E. gameroi", an oblique band crossing from the dorsal profile of the caudal peduncle to the middle-upper rays of the caudal fin.In "E. melaphareus", an inconspicuous patch exists on the dorsal lobe of the caudal fin.In "E. radiosus", the distal half of both the dorsal and ventral caudal fin lobes is pigmented.