Vahlkampfia anaerobica n. sp. and Vannella peregrinia n. sp. (Rhizopoda) - Anaerobic Amoebae from a Marine Sediment

Two species of amoebae, capable of living and multiplying in the absence of oxygen, were isolated from anaerobic marine sediments. Vahlkampfia anaerobica does not have typical mitochondria (but has organelles covered by a double membrane) and it harbours endocytic bacteria. The nuclear envelope of V. anaerobica is associated with the cisternae of the rough endoplasmic reticulum which is a remarkable feature of this species. Vannella peregrinia has double membraned organelles with internal tubular structures, which morphologically resemble mitochondria. Its cell coat consists of glycostyles, which differ in dimensions from those of other Vannella spp.; it needs further investigation.