Reference

Wilhelm Foissner, S. Hess, Khaled A. S. AL-Rasheid (2010): Two vicariant Semispathidium species from tropical Africa and central Europe: S. fraterculum nov. Spec. And S. pulchrum nov. Spec. (Ciliophora, Haptorida) – European Journal of Protistology – 46: 61 - 73.