By Matt Cantor,  Newser Staff                                                                        For the first time, scientists have discovered animals whose genitalia seem to be swapped: The female has a penis-like structure while the male has an organ akin to a vagina, LiveScience reports. The animals in question are four species of flea-sized insects from the genus Neotrogla, found in Brazilian caves. Mating between the creatures is far from rushed: It lasts between 40 and 70 hours, and sees the female inserting her gynosome (what the penis-like organ is being called) into the male’s vagina-like phallosome to retrieve a teardrop-shaped sperm capsule. The gynosome is a “completely novel structure in evolution,” says Kazunori Yoshizawa, lead author of the study, published in Current Biology.  Read more   http://www.newser.com/story/185530/wild-discovery-insects-with-female-penises.html