Alas, I have no idea who Fletcher was or why one Michaelsen decided to name a giant thick worm after him in 1891. He probably didn’t have a zebra-striped penis.
Found by Sam Frankel, at night in subtropical rainforest beside a creek in northern NSW. 30cm long and about 2-3cm thick.
Another of Australia’s pleasing variety of Big Chungus Earthworms, although this one (probably F. unicus or fasciatus based on location) is also disguished by bioluminence if distressed.