Flatworms, also known as Platyhelminthes, constitute a phylum of about 20,000 species of rather uncomplicated invertebrates characterized by their soft bodies and lack of segmentation. They differ ...

Marine flatworms are among the ocean’s most unique, albeit strange, organisms. Their undulating movements make them look like silk sheets underwater. Marine flatworms are skittish but are not uncommon ...

Have you ever wondered how flatworms— you know, those billowing tissue-like invertebrates — reproduce? Well, certain Platyhelminthes engage in a behavior known as “penis fencing,” which involves two ...

One of the consequences of globalization is the introduction of invasive species. Giant hammerhead flatworms, or land planarians, up to 40 cm (over 1 foot) in length, are reported from France and ...

Jean-Lou Justine received grants from the Muséum National d'Histoire Naturelle, Paris, France. He is the Editor-in-Chief of the scientific journal Parasite (http ...

A close relative of schistosomes are the free-living planarians; the two groups are members of the phylum Platyhelminthes (flatworms). Planarians have exceptional regenerative powers and so have ...

Recently, field research by the Brazilian zoologists Lívia Cordeiro and Rodrigo Borghezan, of the Universidade de São Paulo (USP), recorded the first obligate cave-dwelling planarian of the suborder ...

General animal biology: Frog as a representative animal -- Materials of the animal body -- Body covering, skeleton, and body muscles -- Digestive systems and metabolism -- Circulatory systems -- ...