Its host is the planarian flatworm. These organisms include urodele amphibians, zebrafish, and planarian flatworms as major creatures of study. A planarian is one of many flatworms of the traditional class Turbellaria. For example, a planarian split lengthwise or crosswise will regenerate into two separate individuals. At the head of the planarian there is a ganglion under the eyespots. The conclusion is that planarian regeneration cannot be listed neither to Epimorphosis or Morphallaxis. Bipalium adventitium is a land planarian in the subfamily Bipaliinae. Thus, one of their gametes will combine with the gamete of another planarian. Bipalium kewense is a species of large predatory land planarian with a cosmopolitan distribution. These include the jellyfish "Turritopsis dohrnii", the hydra, and the planarian. Each planarian transports its secretion to the other planarian, giving and receiving sperm. Each planarian transports its excretion to the other planarian, giving and receiving sperm. Obama nungara is a species of land planarian in the family Geoplaninae.