Eimeria parastiedica Duszynski, 1985
Type host: Neurotrichous gibbsii (Baird, 1858), American shrew mole.
Other hosts: None reported to date.
Type locality: NORTH AMERICA: USA, Wasington, Kittitas Co., 3.2 km S, 0.8 km W. of Roslyn.
Geographic distribution: NORTH AMERICA: USA, Oregon, Washington.
Description of oocyst:
Oocyst shape: subspheroid, rarely spheroid;
number of walls: 2;
wall thickness: ~1.5;
wall characteristics: outer with irregular bumps, yellow-brown, ~3/4 of total thickness; inner is membranous, colorless;
L x W: 27.4 x 25.5 (25-30 x 22-28);
L/W ratio: 1.1 (1.0-1.2);
Distinctive features of oocyst: large size, subspheroid shape, with irregular bumps on outer wall.
Description of sporocysts and sporozoites:
Sporocyst shape: ovoid to football-shaped, pointed at both ends;
L x W: 18.3 x 10.4 (16-20 x 9-11);
L/W ratio: 1.8 (1.6-1.9);
SB: present, prominent, ~2-3 wide;
SSB: present, prominent, ~3.8 x 4.0;
PSB: present at pointed end opposite SB-SSB complex;
SR characteristics: 1 large (~7.5) lipid-like globule with 2-3 smaller satellite bodies;
SP: lie lengthwise in sporocyst without RB.
Distinctive features of sporocyst: pointed at both ends with distinct SB, SSB, and PSB all present.
Prevalence: 2/17 (12%).
Sporulation: Exogenous. Oocysts sporulated in 7-10 days in 2.5% aqueous (w/v) potassium dichromate solution at 23 C.
Prepatent and patent periods: Unknown.
Site of infection: Unknown. Oocysts recovered from feces and intestinal contents.
Materials deposited: Skin, skull, skeleton and tissues of the symbiotype host are preserved in the Mammal Division of the Museum of SW Biology, UNM: MSB No.43426 (NK 3131, sex undetermined), J.A. Cook #379, 6 July, 1980. Photosyntypes in the USNPC No. 86000.
Remarks: This is one of only 2 Eimeria spp. from insectivores that have sporocysts with a SSB. This species has not been reported since its original description.
References: Duszynski (1985).