Advertisement Just to get it out of the way, this isn't the most ideal way to ID damon sp. but I feel there's some obvious differences between the two sp. that should be addressed. Here's the dorsal comparison between two juvenile Damon sp. diadema- left; medius- right Both are females and have the same body length. • Appears medius has longer legs including the anteniform legs. •Diadema have a complete set of 3 solid light colored bands that completely wrap around legs II, III, & IV. In contrast medius bands don't completely wrap around and the 3rd band closest to the knee is a shade of red as juveniles which almost dissappear upon maturity. •Defensive behavior between the two species differ as well. My medius are much more defensive and have an interesting pushup behavior to go along with baring the pedipalps when disturbed. Damon diadema Damon medius -JohnD.