Cyclospora ashtabulensis Ford and Duszynski, 1989
Type host: Parascalops breweri (Bachman, 1842), Hairy-tailed mole.
Other hosts: None reported to date.
Type locality: NORTH AMERICA: USA, Ohio, Ashtabula Co.
Geographic distribution: NORTH AMERICA: USA, Ohio.
Description of oocyst:
Oocyst shape: subspheroid to ellipsoid;
number of walls: 2;
wall thickness: >1.0;
wall characteristics: outer layer rough, ~2/3 of total thickness; inner, smooth;
L x W: 18.0 x 14.3 (14-23 x 11-19);
L/W ratio: 1.3 (1.1-1.7);
Distinctive features of oocyst: a membranous material, perhaps a thin inner oocyst wall layer,
appears to hold the sporocysts together.
Description of sporocysts and sporozoites:
Sporocyst shape: ovoid;
L x W: 11.6 x 7.2 (8-14 x 5-9);
L/W ratio: 1.6 (1.2-2.0);
SB: present as crescent-shaped cap covering rounded end of sporocyst;
SR characteristics: several globules, often obscuring SP or as a compact mass;
SP: without RB.
Distinctive features of sporocyst: crescent-shaped SB.
Prevalence: 7/16 (44%)
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. 43419
(NK 31211, male), K. McBee #120, 29 June, 1980. Photosyntypes in the USNPC No. 80590.
Remarks: The sporulated oocysts of this species resemble those of C.
megacephali because both have an unusual crescent-shaped SB. They differ, however, by lacking a PB,
having a rough outer wall (vs. smooth), being somewhat smaller (18 x 14 vs 19 x 16), and by having
sporocysts with a smaller L/W ratio (1.6 vs 2.1) and without a pointed end opposite the SB.
References: Ford and Duszynski (1989).