Fig. 4 in Phylogenetic placement and microthrix pattern of Paranybelinia otobothrioides Dollfus, 1966 (Trypanorhyncha) from krill Nyctiphanes simplex Hansen, 1911

Fig. 4. Surface ultrastructure of the scolex of Paranybelinia otobothrioides. (A) Anterolateral bothrial margins showing the distribution pattern of hamulate spinitriches with extended bases. (B,C) Hamulate spinitriches along the bothrial margins and on the distal bothrial surface. (D) Lineate spinitriches on the posterior margins of the bothria. (E) Tegumental groove at the posterior part of the bothria surrounded by lineate spinitriches and capilliform filitriches on the pars postbulbosa (also on pars vaginalis and bulbosa). (F) Tegumental groove at the posterior part of the bothria showing similar spinitriches (lineate or hamulate) to the surrounding bothrial surface. (G) Posterior end of appendix. (H) Appendix covered with papilliform filitriches. Scale bars: A, C, 100 μm; D-H, 50 μm.