Eimeria maricopensis n. sp (Apicomplexa: Eimeriidae) from the Arizona cotton rat Sigmodon arizonae Mearns (Rodentia: Cricetidae) in central Arizona, USA

摘要

Eimeria maricopensis n. sp. (Apicomplexa: Eimeriidae) is described from 2 of 15 (13%) Arizona cotton rats Sigmodon arizonae Mearns in Arizona, USA. Sporulated oocysts of this new species are ovoidal to ellipsoidal, 20-28 x 16-22 (24.9 x 19.2) A mu m, with a smooth, bi-layered wall; both micropyle and oocyst residuum are absent, but fragmented polar granule material is present. Sporocysts are ellipsoidal, 11-14 x 6-8 (12.9 x 7.0) A mu m, with a Stieda body, sub-Stieda body, and sporocyst residuum; sporozoites are elongate with a spheroidal anterior refractile body and a subspheroidal posterior refractile body. In addition, sporulated oocysts of Eimeria sigmodontis Barnard, Ernst & Dixon, 1974, Eimeria tuskegeensis Barnard, Ernst & Dixon, 1974 and Eimeria webbae Barnard, Ernst & Dixon, 1974 are described from S. arizonae. This is the first report on the coccidia of S. arizonae.