Location: Unknown. Oocysts found in feces.
Geographic Distribution: Europe (Hungary), North America (Alabama).
Morphology: This species has been described by Pellerdy (1949) in Hungary and by Lesser and Davis (1958) in Alabama. The oocysts are ellipsoidal, rarely broadly ovoid, 17 to 36 by 13 to 24 u with a mean of 23.8 by 17.9 u. The oocyst wall is smooth or occasionally roughened, yellowish brown or pinkish brown, 1.0 to 1.5 u thick. The micropyle is imperceptible or is seen only when the oocyst lies in a favorable position. A polar granule is present in about half the oocysts. There is no oocyst residuum. The sporocysts are ellipsoidal, 15 to 19 by 6 u. A sporocyst residuum is present. The sporulation time is 8 to 9 days.
Life Cycle: Unknown. Pellerdy (1949) found that the prepatent period in 3 experimentally infected pigs was 8 to 9 days.