Heleopera sphagni Leidy, 1874
Diagnosis: Shell broadly ovoid, regular in outline, compressed; chitinous membrane tinted yellowish (rarely brownish), with a surfacing of irregular transparent siliceous plates; fundus with little foreign material, often without. The presence of the chlorellae seems to be necessary to the life of the animal.
Dimensions; Length 87-168 um.
Ecology: Sphagnum swamps.
Remarks: Heleopera picta is a synonym for H. sphagni.