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  2. Planarian - Wikipedia

    en.wikipedia.org/wiki/Planarian

    The planarian has a soft, flat, wedge-shaped body that may be black, brown, blue, gray, or white. The blunt, triangular head has two ocelli (eyespots), pigmented areas that are sensitive to light. There are two auricles (earlike projections) at the base of the head, which are sensitive to touch and the presence of certain chemicals.

  3. Morphallaxis - Wikipedia

    en.wikipedia.org/wiki/Morphallaxis

    When a hydra is cut in half, the head portion can regenerate and form a new foot with the basal disc, and the foot portion can regenerate and form a new head with the hypostome region. If a hydra was severed into smaller pieces, the middle pieces would still form a head and foot at the appropriate regions of the hydra.

  4. Planaria - Wikipedia

    en.wikipedia.org/wiki/Planaria

    Planaria is a genus of planarians in the family Planariidae. Due to its excellent ability to regenerate, species of Planaria has also been used as model organisms in regeneration studies. [ 1 ] When an individual is cut into pieces, each piece has the ability to regenerate into a fully formed individual. [ 2 ]

  5. Neoblast - Wikipedia

    en.wikipedia.org/wiki/Neoblast

    Morgan found that a piece corresponding to 1/279th of a planarian [11] or a fragment with as few as 10,000 cells could regenerate into a new worm within one to two weeks. [13] Morgan also found that if both the head and the tail were cut off a flatworm the middle segment would regenerate a head from the former anterior end and a tail from the ...

  6. Bipalium - Wikipedia

    en.wikipedia.org/wiki/Bipalium

    Bipalium species are predatory.Some species prey on earthworms, while others may also feed on mollusks. [10] [11] These flatworms can track their prey. [12]When captured, earthworms begin to react to the attack, but the flatworm uses the muscles in its body, as well as sticky secretions, to attach itself to the earthworm to prevent escape.

  7. Planaria torva - Wikipedia

    en.wikipedia.org/wiki/Planaria_torva

    Planaria torva is a species of planarian in the family Planariidae. [1] When an individual is cut into pieces, each piece has the ability to regenerate into a fully formed individual. [ 2 ]

  8. Dugesiidae - Wikipedia

    en.wikipedia.org/wiki/Dugesiidae

    The head usually has a somewhat triangular shape and has two eyes (except for some subterranean eyeless species). The main differences between Dugesiidae and other freshwater planarians are related to the anatomy of the eyes and the copulatory apparatus.

  9. Bipalium kewense - Wikipedia

    en.wikipedia.org/wiki/Bipalium_kewense

    Bipalium kewense, also known as the shovel-headed garden worm, is a species of large predatory land planarian with a cosmopolitan distribution. [ 1 ] [ 2 ] It is sometimes referred to as a "hammerhead flatworm" due to its half-moon-shaped head, but this name is also used to refer to other species in the subfamily Bipaliinae .