title: Additional notes on the coccidian parasites of the soft-shell turtle, Trionyx spiniferus Le Sueur, in Iowa, with a description of Eimeria vesicostieda sp. n.
abstract: Oocysts of Eimeria dericksoni Roudabush, Eimeria mascoutini Wacha & Christiansen, and Eimeria vesicostieda sp. n. were isolated from the Spiny Soft-shell Turtle, Trionyx spiniferus LeSueur, in Iowa. The sporulated oocysts of E. dericksoni are redescribed to include, for the first time, the dimensions of the sporocysts (6.0-8.5 x 3.0 5.0 micrometer) ant the structural appearance of the Stieda body (thinly convex); the oocysts of E. vesicostieda are newly described as being thick-walled, narrowly avoid to narrowly ellipsoid, measuring 22.0-25.5 x 16.5-20.5 micrometer, and having a polar granule, a sporocyst residuum, and a vesicle-like Stieda body; the oocysts of E. mascoutini are documented photographically.
mesh_terms: D000818:Animals; D004539:Eimeria / Q000166:cytology*; D007484:Iowa; D013170:Spores / Q000166:cytology; D014426:Turtles / Q000469:parasitology*