Females have penises in sex-reversed cave insects

Neotrogla females are unsual as they insert erectile organs into male vagina -like openings.This structure is called Tynosome and used to suck out the sperm and nutritious fluids and copulation can last 40-70 hours -report from Current Biology.These insects -females with (PENISES)were discovered in Brazil  and are the first example of sex-reversed genitalia in an animal.see more on bbc homepage