sentences:  A few cryptophytes, such as "Cryptomonas", can form palmelloid stages, but readily escape the surrounding mucus to become free-living flagellates again.Some "Cryptomonas" species may also form immotile microbial cysts–resting stages with rigid cell walls to survive unfavorable conditions.Cryptophyte flagella are inserted parallel to one another, and are covered by bipartite hairs called mastigonemes, formed within the endoplasmic reticulum and transported to the cell surface.