Type host: Spermophilus franklinii.

Description of oocyst: Oocyst shape: subspheroid to ellipsoid; wall thickness: not given; layers: 2; outer layer proportion of total thickness: not given; outer layer colour: transparent; outer layer texture: smooth; inner wall characteristics: transparent; micropyle: absent; OR: present; OR characteristics: decreases in size as oöcyst ages; OR L x W: not given; PG: present; number of PGs: 2; PG shape: not given; PG L x W: not given; size: 20.6 x 15.2 (19-24 x 13-18); L/W ratio: 1.4. Distinctive features of oocyst: oocyst residuum decreases in size as oöcyst ages.

Description of sporocysts and sporozoites: Sporocyst shape: ellipsoid; size: 11.5 x 6.0; SB: present; SB L x W: not given; SB characteristics: with a protruding nipple on one end; SSB: absent; PSB: absent; SR: present; SR characteristics: not given; SR size: not given; SP: not described. Distinctive features of sporocyst: none.

Type locality: North America: USA, Iowa, Animals collected near Ames, Iowa.

Remarks: Eimeria franklinii has been observed only once (Hall & Knipling, 1935).

Reference: Hall & Knipling (1935).