the species described were compared with the related species of the genus.the new species of henneguya parasitic on h. littorale has cysts with synchronous development, the spore body was 14.6 (11.4-16.7) /urn long by 6.5 (4.9-7.9) μm wide.the total length of the spore was 33.6 (27.3-38.1) ?mi and each valve had a caudal process measuring 19.0 (15.6-22.5) μm.the larger polar capsule was 4.4 (3.3-5.6)μm long by 2.0 (1.6-2.3) μm wide, the smaller polar capsule was 4.1 (3.3-5.3) ?mi long by 2.2 (1.5-2.8) fum wide.