w.m. One of the largest known ciliates and a voracious consumer of Paramecium.

W.m., devouring Paramecium. Didinium is a voracious predator, expanding to accommodate successive victims. This dramatic preparation shows several...

w.m. Ovoid form with cirri and band-like nucleus.

w.m. Truncated anteriorly; numerous zoochlorellae make the living animal appear green.

Fission, w.m. From mass culture; several specimens undergoing fission.