FIGURES 19–22 in Guide to the trematodes (Platyhelminthes) that infect the California horn snail (Cerithideopsis californica: Potamididae: Gastropoda) as first intermediate host

FIGURES 19–22. Acanthoparyphium spinulosum (Acsp). 19, Overview of a colony in a freshly deshelled, infected horn snail in sea water. The arrow indicates the colony, which is localized in the gonadal region. Note the prominent white areas, which are masses of cercariae that have left the orange rediae. Scale bar = 1 cm. Base photo credit: Todd Huspeni. 20, Reproductive rediae, live, with developing cercariae, under coverslip pressure. Scale bar = 100 µm. 21, Soldier redia, live. Scale bar = 100 µm. Base photo credit: Ana Garcia-Vedrenne. 22, Cercariae, live, under coverslip pressure. Scale bar = 100 µm. Base photo credit: Todd Huspeni.