Figure 4. Gonad development in Mesorhabditis paucipapillata. Genital primordium a–e, h, i. a: Firststage juvenile; b: moulting second-stage male juvenile; c: moulting second-stage female juvenile; d: third-stage male juvenile; e: third-stage female juvenile; f: tail of third-stage male juvenile showing spicular primordium; g: tail of third-stage female juvenile; h: fourth-stage male juvenile; i: fourth-stage female juvenile; j: adult male gonad; k: adult female gonad. Scale bars = 10 µm.