Diagnosis_species: Biflagellate zoospores reniform, about 4 mm long and with transverse flagellum, small alveoli, refractile body, a central mitochondrion, one nucleus with condensed chromatin directly beneath the nuclear envelope, large lipid droplet(s), micronemes, bipartite trichocysts with bodies square in cross section that are oriented toward the cell apex and a cluster of oblong microbodies. A reduced, sheet-like pseudoconoid consisting of 4–5 microtubules positioned above an orthogonal pair of basal bodies. Early developmental stage of intracellular sporangium about 5–15 mm in diam that formed a complex three-layered envelope with a convoluted midlayer surrounding spherical bodies and amorphous spaces; middle stages about 20–25 mm in diam and consisting of a robust cyst wall containing an undifferentiated mass; late stages consisting of a mass of differentiated zoospores. Pronounced germ tube about 4–5 mm in diam and 10–15 mm long. Prior to spore differentiation, the sporangia contain nuclei without condensed chromatin, mitochondria, lipid droplets, trichocysts and basal bodies.

Body_spores_length: 4 µm