Steinernema affine male. A: first generation entire body. B: the anterior portion, right arrow refers to nerve ring position while left arrow refers to excretory pore. C: arrows refer to velum of spicule. D: lateral view of the five pairs of papillae anterior to cloaca opening, addition to the two pairs of papillae (1st, 2nd) posterior to the gubernaculum. E: lateral view of adanal ventral one papillae (S), and two pairs of papillae posterior to the gubernaculum (2nd, 3rd). F: two pairs of papillae (1st, 2nd) posterior to the gubernaculum, the arrows refer to three pairs of papillae near the tail tip, G: arrows refer to mucro of tail which surrounded by three pairs of papillae. H: lateral view of spicules and gubernaculum. I: ventral view of gubernaculum. J: moderately curved spicules. K: second generation tail male without a mucro. A: 1481 µm. B: EP = 119 µm, NR = 126 µm. H,I: SL = 65 µm. GL = 50 µm. J = SL = 68 µm, GL = 51 µm. K = 41 µm.