Eimeria heterocapita Duszynski, 1985
Type host: Neurotrichus gibbsii (Baird, 1858), American shrew mole.
Other hosts: None reported to date.
Type locality: NORTH AMERICA: USA, Washington, Pierce Co., R3E, T20N, Sec. 24, 5.8 km S., 3.8 km E of Tacoma Center.
Geographic distribution: NORTH AMERICA: USA, Washington.
Description of oocyst:
Oocyst shape: subspheroid to ellipsoid;
number of walls: 2;
wall thickness: ~1.5;
wall characteristics: outer, ~2/3 of total thickness, smooth, colorless to pale yellow with a membranous cap-like structure (amicropylar cap, see Duszynski, 1985) at one end that appears foamy in consistency and measures 1-5 high x 6-12 wide; inner, light blue to light green;
L x W: 25.5 x 21.4 (23-27 x 18-23);
L/W ratio: 1.2 (1.1-1.3);
Distinctive features of oocyst: only oocyst described to date from insectivores with an amicropylar cap.
Description of sporocysts and sporozoites:
Sporocyst shape: ovoid;
L x W: 13.6 x 10.0 (12-15 x 9-11);
L/W ratio: 1.3 (1.2-1.6);
SR characteristics: a compact, faceted mass, ~6-8 x 5-6 that appears membrane-bound;
SP: with 2 RB: an elongate posterior one and a spheroid central one.
Distinctive features of sporocyst: absence of SB abd SSB and SP with 2 RB.
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. 43477 (NK 3162, female), R.M. Sullivan #519, 8 July, 1980. Photosyntypes in the USNPC No. 85986.
Remarks: This species has not been reported since its original description.
References: Duszynski (1985).