A NEW SPECIES OF ISOSPORA SCHNEIDER, 1881 (APICOMPLEXA, EIMERIIDAE) FROM THE WHITE-THROATED MAGPIE JAY CALOCITTA-FORMOSA (PASSERIFORMES, CORVIDAE) FROM COSTA-RICA
Sj. Upton et al., A NEW SPECIES OF ISOSPORA SCHNEIDER, 1881 (APICOMPLEXA, EIMERIIDAE) FROM THE WHITE-THROATED MAGPIE JAY CALOCITTA-FORMOSA (PASSERIFORMES, CORVIDAE) FROM COSTA-RICA, Systematic parasitology, 31(3), 1995, pp. 195-199
A new species of isosporan (Apicomplexa: Eimeriidae) is reported from
two magpie jays Calocitta formosa (Swainson) (Passeriformes: Corvidae)
from Costa Rica. Oocysts of Isospora calocitta n. sp. are spherical t
o subpherical, 28.8 x 27.7 (26.5-31.0 x 25.0-29.5) mu m and have a sha
pe index (length/width) of 1.04 (1.00-1.11). A micropyle and oocyst re
siduum are absent, but 1-3 polar granules are present. Sporocysts are
ovoidal, 20.1 x 12.6 (19.0-21.5 x 11.5-13.5) mu m, and have Stieda and
substieda bodies and a shape index of 1.60 (1.47-1.69). A diffuse spo
rocyst residuum is present and each sporozoite contains two refractile
bodies. A list of Isospora spp. in corvid birds is presented.