Haplosporidium is a genus of rhizaria.
It includes the species Haplosporidium nelsoni.[1]
Euglyphida: Cyphoderiidae (Cyphoderia) · Euglyphidae (Euglypha) · Paulinellidae (Paulinella) · Trinematidae (Trinema)
Phytomyxa/Plasmodiophorida (Spongospora, Plasmodiophora)
Vampyrellidae/Aconchulinida (Arachnula, Platyreta)
Pseudospora
Ascetosporea: Paramyxea (Marteilia) · Haplosporidia (Haplosporidium, Urosporidium)
Gromiidae (Gromia)