Morphology of F. buski

F. buski egg. Image taken from Chiang Mai University

F. buski adult. Image taken from Ohio State University

Eggs

*Size: About 140 um x 80 um
*Shape: Ellipsoidal, thin shell. Small, indistinct operculum.
*Color: Yellowish-brown. Shell is transparent.
*Stage when passed in feces: Unembryonated. Filled with yolk cells in which an indistinct germinal cell is imbedded.

Adults

*Size: 2 to 7.5 cm long, 0.8 to 2 cm wide.
*Shape: Elongated ellipsoid.
* F. buski is hermaphroditic. Female organs are found in the anterior half, while the testes are found in the posterior half.

Features that distinguish F. buski from F. hepatica:

*F. buski has no cephalic cone.
*Oral sucker is 1/4 the size of the nearby ventral sucker (whereas in F. hepatica, the suckers are closer in size)
*F. buski has a pair of unbranched intestinal ceca.