eimeria fraterculae eimeria fraterculae eimeria fraterculae is a species of alveolates belonging to the family eimeriidae. it causes renal coccidiosis in the atlantic puffin (fratercula arctica). eimeria fraterculae scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: alveolata phylum: apicomplexa class: conoidasida order: eucoccidiorida family: eimeriidae genus: eimeria species: e. fraterculae binomial name eimeria fraterculaeleighton and gajadhar, 1986 apart from its host-specificity, this coccidium can be recognised by the subspherical oocytes with unusually thick walls appearing distinctly greenish in colour. coccidiosis caused by this parasite appears to be mild and nonfatal.