Synonyms: Eimeria boehmi Supperer, 1952; Eimeria orlovi Basanov, 1952.
Hosts: Ox, zebu. In addition, Bohm and Supperer (1956) reported finding this species in several chamois in Austria, but gave no morphological information on which a comparison could be based.
Location: Unknown. Oocysts found in feces.
Geographic Distribution: North America, South America (Brazil), Europe(Austria), Africa (Nigeria), USSR (Kazakhstan).
Prevalence: Davis and Bowman (1952) stated that this species is uncommon in Alabama. Hasche and Todd (1959) found it in 6% of 927 cattle in Wisconsin. Torres and Ramos (1939) found it in 3% of 146 cattle in Brazil. Supperer (1952) found it in 7% of 130 cattle in Austria. Lee and Armour (1958) saw it frequently in cattle in Nigeria. Basanov (1952) found it in Kazakhstan, USSR.
Morphology: The oocysts are ellipsoidal, colorless to yellowish or pinkish, smooth, 31 to 49 by 22 to 33 u, with a mean of 36 to 38 by 26 to 27 u. The oocyst wall is composed of a single layer. The micropyle is 5 to 6 u in diameter, and is covered by a micropylar cap 8 to 12 u wide and 1.5 to 3 u high; this cap tends to collapse on storage in unprepared feces in the refrigerator. An oocyst polar granule is present. An oocyst residuum is absent. The sporocysts are elongate ovoid (with a fine "operculum", according to Torres and Ramos), 16 to 22 by 7 to 9 u, (Supperer). A sporocyst residuum is present. The sporulation time is 6 to 7 days at 27° C (Lee and Armour, 1958) or 12 to 14 days at 20° C (Supperer, 1952).
Life Cycle: Unknown.