Schellackia (Apicomplexa: Eimeriidae) of the brazilian tree-frog, Phrynohyas venulosa (Amphibia: Anura) from Amazonian Brazil

endogenous stages of a schellackia species are described in histological sections of the intestine of the tree-frog, phrynohyas venulosa, from north brazil. most oocysts sporulate within the epithelial cells of the gut, but a few were detected in the lamina propria.