FIGURES 20–24 in Five new species of Acanthobothrium van Beneden, 1849 (Cestoda: Tetraphyllidea) in elasmobranchs from the northwest Atlantic and Gulf of Mexico with first records from smooth-hound sharks and guitarfish

FIGURES 20–24. Acanthobothrium ulmeri sp. nov. from the roundel skate, Raja texana. 20. Scolex. Note acuminate bothridia and short cephalic peduncle 21. Hooks showing two variations in form of lateral hook. 22. Terminal segment. 23. Terminal genitalia. Note vaginal constriction. 24. Entire worm. Scale bars: Fig. 20= 100 µm. Fig. 21= 25 µm. Figs. 22, 23= 50 µm. Fig. 24= 250 µm.