Eimeria spermophili Hilton & Mahrt, 1971.
Type host: Cynomys gunnisoni
Other hosts: C. leucurus; C.
ludoviciani; Marmota flaviventris; Spermophilus elegans; S.
franklinii; S. richardsonii.
Type locality: North America: Canada, Alberta.
Animals collected from various locations in Alberta.
Other localities: North America: USA, Utah,
Description of oocyst: Oocyst shape: ovoid to
ellipsoid; wall thickness: 1.5;
layers: 1; outer layer colour: colourless to pale yellow; outer layer texture:
smooth; micropyle: absent; OR: present; OR characteristics: compact mass of small
globules (in drawing); residuum L x W: not given; PG: present, not always visible;
number of PGs: 1; PG shape: not given; PG L x W: not given; size: 25.1 x 21.0 (21-30
x 17-24); L/W ratio: 1.2. Distinctive features of oocyst: wall thins from 1.5 to 0.9
at tapered end.
Description of sporocysts and sporozoites:
shape: elongate-ovoid; size:
10.3 x 7.7 (8-12 x 7-8); SB: present; SB L x W: not given; SB characteristics:
distinct; SSB: absent; PSB: absent; SR: present; SR characteristics: clump of
granules located between SP; SR size: not given; SP: reniform, narrowing at one end
and positioned at ends of sporocyst. Distinctive features of sporocyst:
Remarks: Eimeria spermophili was described
Hilton & Mahrt (1971) in S. richardsonii.
References: Hilton & Mahrt (1971); Seville (1997);
Seville & Stanton (1993a); Shults
et al. (1990); Stanton et al. (1992); Thomas & Stanton (1994).