Marine Flora and Fauna of the Eastern United States Platyhelminthes

Hendrix: Monogenea of the Eastern United States 37
37(36) Haptor dorsal transverse bar with knobbed lateral extremities; penis sclerotized, tubular, straight,
with spiral thread and V-shaped accessory piece. Parasitic on white perch, Marone americana.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Onchocleidus nactus (Fig. 43)
37(36) Haptor dorsal transverse bar without lateral knobs; penis tube curved, without spiral thread. . . . . . . . .. 38
A
Figure 43
Onchocleidus nactus: (A) ventral view. Scale: 0.05 mm; (B) dorsal hamulus; (C) ventral hamulus;
(D) dorsal bar; (E) ventral bar. B-D scales: 0.02 mm. Drawn from USNM 73744.
B
c
o
E