Planarian - Wikipedia
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.
Girardia tigrina - Wikipedia
Girardia tigrina, known as the brown planarian or the immigrant triclad flatworm, is a species of dugesiid native to the Americas. [1] . It has been accidentally introduced into Europe [2] and Japan. [3] G. tigrina individuals are around 10 mm in length. They have a …
Planarian | Anatomy & Facts | Britannica
Planarian, any of a group of widely distributed, mostly free-living flatworms of the class Turbellaria (phylum Platyhelminthes). The name planarian is used to designate any member of the family Planariidae and related families. Most planarians live in fresh water; some species are marine, while others are terrestrial.
Turbellarians (Planarians; Free-Living Flatworms)
Turbellarians, or planarians, have primitive body plans. There are many species, but all have some traits in common. In Missouri, most are tan, brown, black, or gray (but they can be brightly colored elsewhere, and species that live in caves usually look pink). They are flat or ribbonlike.
Planarian – Biology, Classification, Characteristics, and …
Planaria come in a wide range of colors, sizes, and head shapes. The most frequently used planarian in the classrooms and laboratories is the brownish Girardia tigrina. Other common species used are the blackish Planaria maculata and Girardia dorotocephala.
Girardia tigrina (Girard, 1850) - GBIF
These are fissiparous specimens, externally spotted (numerous small black spots intermingled with bigger white spots) on a brownish background and with a pharynx clearly pigmented. The previous reports on distributions of European populations show that the type I-class A populations are the commonest type found.
Care Guide: Planaria - Carolina Biological Supply
Black and brown planaria are your best choice. It will take them about 2 weeks to regenerate at room temperatures. White planaria will regenerate, but they take longer. I ordered black planaria, but I got brown. Why? Black planaria are difficult to …
Planaria - Wikipedia
Currently the genus Planaria is defined as freshwater triclads with oviducts that unite to form a common oviduct without embracing the bursa copulatrix and with an adenodactyl present in the male atrium. The testes occur along the whole body.
The Effect of Caffeine on the Regeneration of Brown Planaria
2019年5月10日 · In this study, twenty one planaria were exposed to two concentrations of caffeine. The heads were amputated, and regeneration was recorded by digital photography. The study showed that the highest dosage of caffeine accelerated the regeneration rate of the planaria in comparison to the lower dosage and control.
Evolutionary dynamics of whole-body regeneration across planarian ...
2023年10月19日 · Our analysis provides a first systematic overview of trait evolution within the taxon, identifies multiple independent transitions in head-regeneration ability and establishes the general...