Although the life cycle of Margalefidinium polykrikoides, formerly called Cochlodinium polykrikoides, has been described previously, the descriptions on asexual and sexual phases of this species collected from Korean coastal waters are strange and still unclear. We collected the resting cysts of M. polykrikoides from surface sediments and re-examined the germination process, and asexual and sexual life stages, and the mating behavior of the vegetative cells using a microscope equipped with high-resolution time-lapse digital camera. The resting cyst of M. polykrikoides had a distinct germination process; before germination, a mature cell in shape was visible within the resting cyst body, and the cell quickly emerged from the resting cyst. The asexual reproduction and cell chain formation of M. polykrikoides were generated in a slightly oblique direction at the epicone of cell and the chain-forming cells of M. polykrikoides could form the chain-forming temporary cysts without asexual or sexual reproduction. The planozygote produced by gamete fusion of M. polykrikoides may not necessarily develop to resting cysts but instead may divide into vegetative cells occasionally. In this phase, the armored cell, which was previously recorded by Kim et al. (2007), was not observed. The sexuality of M. polykrikoides had a homothallic mating behavior.

虽然生命周期Margalefidinium polykrikoides，原名Cochlodinium polykrikoides，以前已经描述过，在韩国沿海水域收集这个品种的无性和有性阶段的描述是奇怪的，还不清楚。我们使用配备高分辨率延时数码相机的显微镜从表面沉积物中收集了多核分支杆菌的静止囊肿，并对其发芽过程，无性和性生活阶段以及营养细胞的交配行为进行了重新检查。多角肌分枝杆菌的静息囊肿具有独特的发芽过程；发芽前，在静止的囊肿体内可见成熟的细胞形状，并且该细胞迅速从静止的囊肿中出现。的无性繁殖和细胞链的形成M. polykrikoides在小区的epicone和的形成链细胞略微倾斜的方向产生M. polykrikoides可以形成没有无性或有性繁殖的形成链临时囊肿。由多角形支原体的配子融合产生的平胎菌不一定会发育成静止的囊肿，而是偶尔会分裂成营养细胞。在这个阶段，装甲的细胞，先前由Kim等人记录。（2007），未观察到。M. polykrikoides的性 具有同型交配行为。