Te. Mcquistion et Ap. Capparella, ISOSPORA-UBIQUE - A NEW COCCIDIAN PARASITE FROM THE WEDGE-BILLED WOODCREEPER (GLYPHORYNCHUS-SPIRURUS) FROM SOUTH-AMERICA, Acta protozoologica, 36(1), 1997, pp. 75-78
A new species of Isospora is described from the faeces of the wedge-bi
lled woodcreeper, Glyphorynchus spirurus from eastern Ecuador and Guya
na. Oocysts of Isospora ubique sp. n. were found in 18/41 wedge-billed
woodcreepers. Sporulated oocysts are subspherical to ovoidal, 23.4 x
21.8 (21-27 x 19-24) mu m, with a smooth, colorless bilayered wall; th
e inner wall is thinner and darker. The average shape index is 1.07. N
o micropyle or oocyst residuum are present but the oocyst contains one
ovoid polar granule. Sporocysts are ovoidal, 14.8 x 10.1 (14-16 x 9-1
1) mu m, average shape index is 1.46 with a smooth single layered wall
, and composed of a nipple-like Stieda body but no substieda body. The
sporocyst residuum is usually composed of coarse granules scattered a
mong the sporozoites or sometimes loosely clustered with a thin membra
ne surrounding the sporozoites and residuum granules within the sporoc
yst. Sporozoites are vermiform with an ovoid, posterior refractile bod
y and an ovoid centrally located nucleus and lying randomly in the spo
rocyst.