Marine Flora and Fauna of the Eastern United States Platyhelminthes

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Hendrix: Monogenea of the Eastern United States 11
Haptor aseptate, lacking papillae; anterior adhesive area disklike. Parasitic on the cownose ray,
Rhinoptera bonasus Benedeniella posterocolpa (Fig. 10)
Pharynx constricted near middle (see Fig. IIA).
Pharynx not constricted (see Fig. 11 B) .
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Figure 10
Benedeniella posterocolpa: (A) ventral view. Scale: 2 mm; (B) accessory sclerite. Scale: 0.5
mm; (C) anterior hamulus. Scale: 0.5 mm; (D) posterior hamulus. Scale: 0.2 mm. Drawn
from USNM 38146.
A B
Figure 11
Pharynx shapes: (A) constricted; (B) not constricted.
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