Fig. 3

Steinernema affine female. A: first-generation entire body B: second-generation entire body. C: anterior portion, right arrow refer to nerve ring position and left arrow refer to excretory pore of first generation. D: right arrow refers to nerve ring which located toward the anterior portion of basal bulb. E: vulva of first generation female. F: vulva of second-generation female. G, H: tail region with one and two papilla structure of first generation, respectively. I: tail region with papilla structure of second generation. Scale bar: A = 4245 µm. B = 1460 µm, C: EP = 122 µm, NR = 160 µm. D: NR = 167 µm, EP = 118 µm. F = 0.9 µm. G = 1 µm. H = 1 = 2.1 µm, 2 = 1.2. I = 4.3 µm. E = 19 µm. F = 2 µm. G:1 = 2.1 µm, 2 = 1.3 µm. H: 4.3 µm. I = 0.9 µm