cryptosporidium fragile cryptosporidium fragile cryptosporidium fragile is a parasite which infects amphibians. the oocysts have an irregular, shape (subspherical to elliptical) and surface. the developing parasite is found in the gastric epithelial cells. cryptosporidium fragile scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: alveolata phylum: apicomplexa class: conoidasida order: eucoccidiorida family: cryptosporidiidae genus: cryptosporidium species: c. fragile binomial name cryptosporidium fragilejirků, 2008 it was first discovered in a black-spined toad (duttaphrynus melanostictus) originating from malaysia. c. fragile is not associated with disease in humans.