Four new coccidia (Apicomplexa: Eimeriidae) from the Plateau zokor, Myospalax baileyi Thomas (Rodentia: Myospalacinae), a subterranean rodent from Haibei area, Qinghai Province, China.

摘要

Thirty-eight faecal samples from the Plateau zokor, Myospalax baileyi Thomas, collected in the Haibei Area, Qinghai Province, China, were examined for the presence of coccidia (Apicomplexa: Eimeriidae). Seventeen of 38 faecal samples (44.7%) were found to contain coccidian oocysts representing four new species of Eimeria Schneider, 1875, and four of 17 (23.5%) infected zokors were concurrently infected with two or three of these eimerian species. The sporulated oocysts of Eimeria myospalacensis n. sp. are ovoidal, 9.5-17.0x8.0-13.0 (mean 13.0x10.4) micro m; a polar granule is present, oocyst residuum is absent; sporocysts are ovoidal, 4.5-7.5x3.0-5.0 (mean 6.3x4.2) micro m and have both a Stieda body and residuum. Oocysts of Eimeria fani n. sp. are ellipsoidal to cylindroidal, 12.5-16.0x8.0-11.0 (mean 14.6x9.9) micro m; a polar granule is present, but micropyle and residuum are lacking; sporocysts are ovoidal, 4.5-7.5x3.0-5.3 (mean 6.7x4.4) micro m; a residuum and a Steida body are present. Oocysts of Eimeria baileyii n. sp. are ellipsoidal, 15.0-23.0x12.0-18.0 (mean 18.2x13.7) micro m; a polar granule is present but oocyst residuum is absent; sporocysts are ovoidal, 8.0-11.0x5.0-7.0 (mean 9.5x5.9) micro m and have both a Stieda body and residuum. Oocysts of Eimeria menyuanensis n. sp. are ovoidal, 12.5-21.0x11.0-18.0 (mean 17.1x14.6) micro m, with a distinct micropyle c.2.5 micro m wide; a polar granule is present but a residuum is absent; sporocysts are ovoidal, 8.0-12.0x5.0-7.0 (mean 10.2x6.4) micro m, and have both a Stieda body and residuum.