Light and electron microscopical studies of Eutreptiella eupharyngea sp. nov. (Euglenophyceae) from Danish and American waters

Abstract

A new species of the biflagellate euglenoid Eutreptiella is described from Danish and American waters. Although somewhat similar to E. braarudii, known from Norway, the new species differs in having a much larger canal/reservoir system and a very fine striation of the pellicle. The general fine structure is compared with that of other euglenoids. Features of particular interest include details of the nuclear endosome, the arrangement of the flagellar hairs and the presence of a system of mucocyst-like bodies in the posterior end. The Danish material contains numerous cytoplasmic bacteria, some apparently being digested by the host.