Hosts: Horse, ass.
Location: Unknown. Oocysts found in feces.
Geographic Distribution: USSR (A zerbaidzhan, western RSFSR, Volga region, Leningrad, Siberia, Tadzhikistan, Uzbekistan).
Prevalence: Gousseff (1935) found this species in 0.8% of 3355 horses, 3% of 251 donkeys and 1% of 161 mules in Russia.
Morphology: The oocysts are oval (ellipsoidal?), bright orange, and 15 to 24 by 12 to 17 u. The oocyst wall is double contoured. A micropyle, oocyst residuum and polar granule are absent. The sporocysts are 6 to 11 by 4 to 6 u. A sporocyst residuum is present.
Life Cycle: Unknown.