Spirotrichea: Heterotrichia: Blepharismidae: Blepharisma Blepharisma undulans Stein, 1867

Genus: Elongate, ovoid; anterior apex often curves over the peristome; non contractile (Carey, 1992). In front of cytostome a two-layered undulating membrane on right edge; contractile vacuole and cytopyge terminal; rose-colored; many species (Kudo, 1966). Species: 70-250 μm long; peristome 1/3 or at times half of the body; 12-15 somatic ciliary rows on one side of the body; macronucleus binodal, two nodes are connected by a thin strand; micronuclei 1-12 are located near the macronuclear membrane; cysts ovoid and dark brown in color; (Giese, 1973).

50 μm 100 μm 150 μm; x 400 : 31 μm 63 μm 94 μm; x 640

Blepharisma undulans, cysts, x 400, x 640, December 1998 by Y. Tsukii
50 μm 100 μm 150 μm; x 400 : 31 μm 63 μm 94 μm; x 640

B. semifiliformis Isquith, 1966: Probably a synonym for B. undulans; 100-180 μm long; ciliary rows 10-14 (Giese, 1973).