Coccidia of Brazilian Mammals: Eimeria corticulata N. Sp. (Apicomplexa: Eimeriidae) from the Anteater Tamandua tetradactyla (Xenarthra: Myrmecophagidae) and Eimeria zygodontomyis N. Sp. from the Cane Mouse Zygodontomys lasiurus (Rodentia: Cricetidae)

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Abstract
Feces from a specimen of Tamandua tetradactyla (Linn.) from Portel, Para State, north Brazil, contained two different coccidial oocysts; one identified as Eimeria tamanduae Lainson 1968, and the other as a new species, described here as Eimeria corticulata n. sp. Oocytes of E. corticulata are ellipsodial, 37.4 .times. 30.4 (31.2-43.7 .times. 23.7-35.0). .mu.m, shape index (length/width) 1.2 (1.0-1.5). Oocyst wall 2.5-3.7 .mu.m thick and composed of two layers; an outer thick, yellow one with radial striations, and a thin inner smooth one: no visible micropyle. Oocyst residuum a large globule of about 10.7 .times. 10.3 .mu.m, usually accompanied by a number of smaller attached globules. Sporocyst ellipsodial, 21.0 .times. 11.0 (20.0-22.5 .times. 10.0-12.5) .mu.m, with a conspicuous Stieda body: shape index 1.9 (1.6-2.2). SPorocysts residuum a small number of scattered granules: sporozoites 18.7 .times. 5.0 .mu.m, with a large posterior refractile body. Eimeria zygodontomyis n. sp. is described in feces from Zygodontomys lasiurus (Lund) from the Serra dos Carajas, Para. Oocysts ellipsoidal to cylindrical, 16.5 .times. 12.0 (13.7-18.7 .times. 11.2-12.3) .mu.m, shape index 1.4 (1.2-1.5). Wall colorless, smooth, single-layered and about 0.6 .mu.m thick: no micropyle. No oocyst residuum, but a polar granule of about 1.8 .times. 1.0 .mu.m is sometimes present. Sporocysts ellipsoidal, 8.4 .times. 5.5 (7.5-8.7 .times. 5.0-6.2) .mu.m, shape index 1.5 (1.4-1.7), with a thin colorless wall and a delicate Stieda body. Sporozoites enclose a compact residuum of about 2.5 .times. 3.7 .mu.m.