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The brains of the free-living polyclad, Notoplana acticola, are considered true brains. [4] The body of the flatworm is bilaterally symmetrical and it involves cephalization. [4] Notoplana acticola brains are unique because of the cellular and subcellular neural components that regulate the behavior of the flatworm. [4]
Catenulida is an order of flatworms in the classical classification, or a class of flatworms in a phylogenetic approach. [2] They are relatively small free-living flatworms, inhabiting freshwater and marine environments. There are about 100 species described worldwide, but the simple anatomy makes species distinction problematic. [2]
Monogenea are Platyhelminthes, so are among the lowest invertebrates to possess three embryonic germ layers—endoderm, mesoderm, and ectoderm. In addition, they have a head region that contains concentrated sense organs and nervous tissue (brain). Like all ectoparasites, monogeneans have well-developed attachment structures.
Amakusaplana acroporae, the Acropora-eating flatworm or AEFW, is a species of free-living marine polyclad flatworms in the genus Amakusaplana. [1] This species preys on the genus Acropora in reef aquariums. [2] These flatworms can grow up to 6 mm and the number of eyes they have increase with body length.
Individual adult digeneans are of a single sex, and in some species slender females live in enclosed grooves that run along the bodies of the males, partially emerging to lay eggs. In all species the adults have complex reproductive systems, capable of producing between 10,000 and 100,000 times as many eggs as a free-living flatworm.
Planarians (triclads) are free-living flatworms of the class Turbellaria, [2] [3] order Tricladida, [4] which includes hundreds of species, found in freshwater, marine, and terrestrial habitats. [5] Planarians are characterized by a three-branched intestine, including a single anterior and two posterior branches. [5]
A parasite called Heterobilharzia americana, a flatworm commonly referred to as liver fluke, was behind the illness of the 11 dogs. The parasite normally makes its home in Texas and in the South.
Macrostomum [1] is a genus of flatworm with a worldwide distribution, [2] [3] [4] with over a hundred species described to date. [2] These hermaphroditic, free-living flatworms are usually small in size, with large species reaching up to 5 mm in body length (e.g. Macrostomum tuba). They are usually transparent, and the smaller species appear ...