portrait

描述：

Petalomonas (pet-al-owe-moan-ass), rigid heterotrophic (no plastids) euglenid, one emerging flagellum which points in front of the moving cells. The flagellum starts within the flagellar pocket (also called the reservoir, and seen to the right) extends through a flagellar canal (not visible) and out at or near the apex of the cell. Either absorbs soluble food or consumes small particles although no mouth is visible by light microscopy. This species is probably P. pusillum, one of the smallest species and usually considered to have a smooth surface, although careful microscopy reveals minor ridges and folds. With cysts. Phase contrast.