Images of an adult male worm in saline. a) full length male; b) anterior end OS = oral sucker, O = esophagus, OB = esophagus bifurcation, C1/C2 = cecum1 and cecum 2, A = acetabulum, VSE = external seminal vesicle, VSI = internal seminal vesicle, I = intestine, and GC = gynecophoric canal; c) spines on the acetabulum, codes the same as defined in (b); d) fine spines in the gynecophoric canal; e) posterior end of worm showing spatulate tail.