peranemidæ

from The Century Dictionary.

• A family of Mastigophora, of the order Euglenida, which have the body either stiff or plastic and usually symmetrical, one or two disimilar flagella at the anterior end, and a distinct mouth at the base of the flagella. The nutrition is holozoic. It contains about a dozen genera, among which are Peranema, Zygoselmis, Petalomonas, and Anisonema.