FIGURES 12–14 in Guide to the trematodes (Platyhelminthes) that infect the California horn snail (Cerithideopsis californica: Potamididae: Gastropoda) as first intermediate host

FIGURES 12–14. Austrobilharzia sp. (Aust). 12, Close-up of an infection (white sporocysts) that has presumably invaded an already established Acanthoparyphium spinulosum (Acsp) colony (orange rediae) in a freshly deshelled, horn snail in sea water. The Aust sporocysts have infiltrated the snail gonadal, digestive gland, and green basal visceral mass regions. Scale bar = 0.5 cm. Base photo credit: Todd Huspeni. 13, Sporocyst, live, with developing cercariae, squashed with heavy coverslip pressure. Note the much smaller heterophyid cercaria that was in this mixed-infection. Ocular micrometer unit = 10 µm. Scale bar = 100 µm. 14, Cercaria, live, under slight coverslip pressure. Scale bar = 100 µm.