trophosphaera trophosphaera trophosphaera is a genus of parasites of the phylum apicomplexa. trophosphaera scientific classification domain: eukaryota (unranked): sar (unranked): alveolata phylum: apicomplexa class: aconoidasida subclass: haemosporidiasina order: achromatorida genus: trophosphaera species trophosphaera planorbulinae only one species (trophosphaera planorbulinae) is known for this genus. history this genus was described in 1939 by le calvez. description host records elphidium crispum