Type host: Hoplobatrachus occipitalis (Gunther, 1858), African tigrine frog.

Other hosts: None reported to date.

Type locality: AFRICA: Kenya, Nginyang, Rift Valley Province (01º 09' 33" N, 37º 15' 47" E)

Geographic distribution: AFRICA: Kenya.

Description of oocyst: Oocyst shape: variable both in size and shape, ovoidal to broadly ellipsoidal; number of walls: 1; wall thickness: ~0.6; wall characteristics: smooth and colorless; L x W: 20.2 x 16.0 (18-24.5 x 13.5-18.5); L/W ratio: 1.3 (1.1-1.4); M: absent; OR: present; OR characteristics: pherical to subspherical (7-11) composed of spherical to subspherical mass of granules resembling those forming the SR; PG: absent. Distinctive features of oocyst: colorless, thin, smooth wall and granules of the OR are of 2 types, elongate and distinctly finer spherical granules.

Description of sporocysts and sporozoite: Sporocyst shape: ovoidal; L x W: 9.8 x 7.2 (8.5-11.5 x 6-8); L/W ratio: not given; SB: present at 1 end (1.5-2 x 0.5-0.7)--sporocyst pole, opposite to SB is usually slightly pointed; SSB: absent; PSB: absent; SR: present; SR characteristics: composed of numerous granules completely filling space between SZ or forming a subspheroidal mass; granules of the SR are of 2 types: elongate ones (2-2.5 x 1-1.5) and finer spheroidal granules (0.5-1); SZ: size not stated, but finely granulated without visible striations, containing probably 2 RBs; RBs usually spheroidal (2-3 x 1.5-2), with a distinct N (2 x 2) located between the RBs. Distinctive features of sporocysts: granules of SR are of 2 types--elongate and finer spherical granules.

Prevalence: 2 of 5 (40%).

Sporulation: Exogenous.

Prepatent and patent periods: Unknown.

Site of infection: Epithelial cell of the entire small intestine, extranuclear.

Endogenous development: Mature meronts were spheroidal to broadly ellipsoidal 8–12 x 5–8 and contained ~20, somewhat spirally arranged merozoites. Mature macrogamonts were spheroidal or ellipsoidal, 16–19 x 13–17, and contained a few distinct wall-forming bodies (1.5–2). Microgamonts were ellipsoidal, 10–12 x 6– 9, containing numerous relatively thick-bodied microgametes.

Materials deposited: Photosyntypes of oocysts in various stages of sporulation and hematoxylin and eosin (H &E) stained paraffin sections with endogenous stages, along with type-host liver in 95% ethanol, were deposited in the collection of the Department of Parasitology, University for Veterinary and Pharmaceutical Sciences Brno, Czeck Republic (R 113/05). A voucher specimen of H. occipitalis was deposited in the herpetological collection of the National Museum of Kenya, Nairobi (NMK A/4246).

Remarks: Only 3 other eimerians from anurans are similar enough to this species to be compared. Eimeria cyanophlyctis from India differs in having distinctly narrower (11 x 4–7 vs. 9.8 x 7.2 [8.5–11.5 x 6–8] in E. terraepokotorum), spindle-shaped sporocysts lacking SR (Chakravarty & Kar 1952). Eimeria leptodactyli from South America, most closely resembling E. terraepokotorum in oocyst and sporocyst size, however, they differ in the appearance of the OR. Eimeria streckeri from North America differs in its oocyst shape (spheroidal), the presence of a distinct vacuole within the OR, and presence of an indistinct SB.