Macracanthorhynchus hirdudinaceus (continued)
OVA
SIZE: 60 x 90 mcm.
SHAPE: Ellipsoidal.
COLOR: Brown.
OPERCULUM: Absent.
CONTENT: Acanthor larva.
SHELL WALL: Heavy with three embryonic layers.
ADULT
SIZE
MALE: 50 to 100 by 4 mm.
FEMALE: 200 to 650 by 7 mm.
SHAPE: Flattened ventrodorsally; cylindrical when preserved; pseudosegmented.
COLOR: Milky white.
RETRACTILE ARMED PROBOSCIS: 5 to 6 rows of spines.
DIGESTIVE SYSTEM: Absent.
CUTICLE: Folded and creased.
Figure 4-41. Stages of Macracanthorhynchus hirudinaceus.
MD0842
4-52