plasmodium circularis plasmodium circularis plasmodium circularis is a parasite of the genus plasmodium subgenus sauramoeba. plasmodium circularis scientific classification kingdom: protista phylum: apicomplexa class: aconoidasida order: haemosporida family: plasmodiidae genus: plasmodium species: p. circularis binomial name plasmodium circularis like all plasmodium species p. circularis has both vertebrate and insect hosts. the vertebrate hosts for this parasite are reptiles. description the parasite was first described by telford and stein in 2000. geographical occurrence this species is found in australia and infects the australian skink egernia stokesii.