11. Additionally, the palp of right maxilla 1 has 4 setae along its outer margin. 12. A thumb-like palp is present. 13. A broad and flat palp is present. 14. Its maxillula has a bilobed palp , while its maxilla shows no characteristics of note. 15. It then tries and often succeeds in inserting the other palp into the female's second orifice. 16. The maxillula has both laciniae slender and ending in bristles and spines; the palp is distinctly bifid. 17. The male redback stores his sperm in a palp _ a thin, tightly coiled organ on his head. 18. The forelegs are palp -like and the other two pairs of legs are modified to protect the gills. 19. This species can be identified by its chaeotaxy, metallic blue color, club-shaped palp and brown calypters. 20. The males of this genus amputate one of their palps before maturation and enter their adult life with one palp only.
