Pernina chaumonti, n.g., n.sp., a new marine amoeba (rhizopoda, heterolobosea): Morphological and ultrastructural cCharacterizations.

Pernina chaumonti, n.g., n.sp., is an amoeba isolated from an industrial culture of marine and unicellular red algae of the genus Porphyridium (Rhodophyceae). This phycophagous and bacteriophagous amoeba managed to develop on an agar medium containing 29%. of NaCl. The study in light and electron microscopy revealed that this amoeba possesses characters of the family Vahlkampfiidae, especially a nuclear division of the promitotic type. Absence of development on culture medium without NaCl, as well as the particularities of the promitosis and the cyst structure encouraged us to propose a new genus whose systematic position should be later defined in comparison with the families Gruberellidae and Vahlkampfiidae.