Type host: Tamias dorsalis.

Type locality: North America: USA, Arizona, Hull Tank, S rim of the Grand Canyon, Grand Canyon National Park.

Description of oocyst: Oocyst shape: ovoid; wall thickness: 1.4; layers: 2; outer layer proportion of total thickness: 0.7; outer layer colour: colourless; outer layer texture: smooth; inner wall characteristics: smooth, pale tan; micropyle: absent; OR: absent; PG: present; number of PGs: 1; PG shape: not given; PG L x W: not given; size: 27.3 x 21.4 (24-30 x 19-23); L/W ratio: 1.3 (1.1-1.4). Distinctive features of oocyst: slightly pointed shape, inner wall disappears at pointed end, PG usually lies among the sporocysts.

Description of sporocysts and sporozoites: Sporocyst shape: lemon-shaped; size: 11 x 8; SB: present; SB L x W: not given; SB characteristics: not given; SSB: absent; PSB: absent; SR: present; SR characteristics: not given; SR size: not given; SP: no RB (in drawing). Distinctive features of the sporocyst: they lie with long axes perpendicular to long axis of oocyst, so they are seen on end.

Remarks: Eimeria eutamiae has been observed only once (Levine et al., 1957).

Reference: Levine et al. (1957).