FIGURES 47–56 in Monogenoidea (Polyonchoinea: Dactylogyridae) parasitizing the gills of marine catfish (Siluriformes: Ariidae) inhabiting the Atlantic Amazon Coast of Brazil

FIGURES 47–56. Neotetraonchus proops (Zambrano & Añez, 1993) n. comb. 47. Vaginal sclerotization. 48. Copulatory complex. 49. Ventral bar. 50. Dorsal bar. 51. Hook pair 5. 51. Hook pair 1. 53. hook pairs 2–4, 6–7. 54. Onchium. 55. Ventral anchor. 56. Dorsal anchor. Fig. 47 scale of 50 µm; Figs. 48–56 scale of 25 µm.