Genus: Paratene makes nearly closed circle around body; ventral kinety often present
(Illustrated Guide, 1985).|
Ovoid to spherical; adoral zone very conspicuous two to four conspicuous sickle-form frontal membranellae, adoral membranellae extend down cytopharynx; no body bristles or cirri (Kudo, 1966). Body conical, ovoid or elongate posteriorly; somatic cilia absent; AZM composed of large membranelles which emerge from the peristome and encircle the apex of the cell; polysaccharide plates or platelets may conver and strengthen the posterior portion of the body (Carey, 1992).
Species: Cell body 40-80 μm long (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).
Images of collecting locality:
Sankaku-numa, a small roadside pond, Kuzubukuro, Higashi-matsuyama city, Saitama Pref., Japan, March 18, 2007 by Y. Tsukii