ULTRASTRUCTURE OF VEGETATIVE AND DIVIDING CELLS OF THE UNICELLULAR RED ALGAE RHODELLA VIOLACEA AND RHODELLA MACULATA¹

Rhodella violacea (Kornmann) Wehrmeyer and Rhodella maculata Evans were investigated for ultrastructural details of vegetative and dividing cells. Rhodella violacea has a nuclear projection into the pyrenoid similar to that found in R. maculata , although the nuclear projection in R. maculata traverses a starch‐lined area before contacting the pyrenoid. Unlike most, red algae, the two Rhodella species lack a peripheral encircling thylakoid in...