English: Temporally alternating life cycles of unicellular holozoans. Putative life stages of the filasterean Pigoraptor vietnamica. Swimming flagellated cells can form long, thin, sometimes branching filopodia that can attach to the substrate. Flagellated cells can sometimes present wide lobopodia. Flagellated cells can retract the flagellum and become roundish, to either divide into two daughter flagellated cells or transition to a cystic stage. This can, in turn, produce two flagellated daughter cells. Cells can also form easily disintegrating aggregations of cells and feed jointly. The life stages of Pigoraptor chileana are very similar to the ones of P. vietnamica, but P. chileana shows a much reduced capability to produce filopodia and lobopodia (both stages are extremely rare in P. chileana).