Type host: Cynomys ludovicianus

Other hosts: Spermophilus townsendii.

Type locality: North America: USA, Idaho, Ada County, Snake River Birds of Prey Area.

Other localities: North America: USA, Wyoming.

Description of oocyst: Oocyst shape: ovoid; wall thickness: 2; layers: 2; outer layer proportion of total thickness: 3/4; outer layer colour: brown; outer layer texture: smooth; inner wall characteristics: smooth; micropyle: absent; OR: absent; PG: present; number of PGs: 1-3; PG shape: rounded; PG L x W: not given; size: 28.5 x 24.6 (25-32 x 21-27); L/W ratio: 1.2 (1.1-1.4). Distinctive features of oocyst: wall thins to 1.0 at tapered end.

Description of sporocysts and sporozoites: Sporocyst shape: elongate-ovoid; size: 14.2 x 8.8 (12-17 x 8-10); SB: present; SB L x W: not given; SB characteristics: not given; SSB: absent; PSB: absent; SR: present; SR characteristics: globular, composed of coarse granules, may be spread among the sporozoites and occupies about 1/4 of sporocyst; SR size: not given; SP: each with a large, oblong RB. Distinctive features of sporocyst: none.

Material deposited: USNPC No. 82932 (phototype).

Remarks: Eimeria pseudospermophili was described by Wilber et al., (1994) in S. townsendii.

References: Seville (1997); Wilber et al., (1994).