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Latest Flatworm Stories

2011-02-09 23:48:09

Two groups of lowly marine worms are related to complex species including vertebrates (such as humans) and starfish, according to new research. Previously thought to be an evolutionary link between simple animals such as jellyfish and the rest of animal life - the worms' surprising promotion implies that they have not always been as simple as they now appear. Although the marine worms Xenoturbella and Acoelomorpha are very simple animals "“ they lack a developed nervous system or gut...

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2010-10-13 11:11:56

A study of peptide hormones in the brain of a seemingly primitive flatworm reveals the surprising complexity of its nervous system and opens up a new approach for combating a major parasitic disease, researchers report. The study appears in the open-access journal PLoS Biology. The planarian flatworm, Schmidtea mediterranea, is perhaps best known for its prodigious powers of regeneration. Cut it in half (lengthwise or crosswise) and each fragment will regrow its missing parts, including its...

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2009-09-23 09:59:18

In the most computationally intensive phylogenetic analysis to date, an international research team led by Brown University has found the first evolutionary branching for bilateral animals. The researchers determined that the flatworm group Acoelomorpha is a product of the deepest split within the bilateral creatures "” multicelled organisms that, like humans, have symmetrical body forms. Results appear online in Proceedings of the Royal Society B. When it comes to understanding a...

2009-09-14 15:37:11

Amputations trigger a molecular response that determines if a head or tail will be regrown in planaria, a flatworm commonly studied for its regenerative capabilities. Until now, no molecular connection between wounding and the decision to regenerate either a head or tail in planaria had been identified. Whitehead Institute scientists report this finding in the September 15-28 issue of PNAS Early Edition. Regeneration is the regrowth of part of an organism's body after it has been damaged or...

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2009-07-15 12:45:00

Information could lead to new treatments for schistosomiasisTwo international research teams have determined the complete genetic sequences of two species of parasitic flatworms that cause schistosomiasis, a debilitating condition also known as snail fever. Schistosoma mansoni and Schistosoma japonicum are the first sequenced genomes of any organism in the large group called Lophotrochozoa, which includes other free-living and parasitic flatworms as well as segmented roundworms, such as the...

2009-06-23 11:39:17

University of Minnesota Medical School researchers have discovered an important new insight into how a commonly prescribed drug may work to treat those infected by a parasitic flatworm.The Schistosomasis parasite infects about 200 million people in tropical areas worldwide and is endemic in more than 70 countries, where people become infected simply by bathing, drinking, or cooking water contaminated with the flatworm. Although not immediately deadly, left untreated, the disease can...

2008-09-22 15:00:53

A U.S. study shows a key genetic pathway for cell growth and division is similar in both humans and flatworms, or planarians. Planarians, normally living in freshwater, are known for their ability to regenerate. A planarian cut into 200 pieces can generate 200 new individuals. Now research suggests the planarian can help scientists understand the basis of human development and disease. Scientists at the University of Utah and the Forsyth Institute at Harvard University report planaria...

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2008-09-20 07:49:18

Key genetic pathways for cell growth and division are similar in both humans and the invertebrate master of regeneration -- the planarian Any way you slice it, the planarian's contributions to biological research just keep on growing. The planarian, a flatworm normally living in freshwater, is well known for its amazing ability to regenerate "“ a single planarian cut into 200 pieces can generate 200 new individuals. New research now demonstrates that the planarian is not merely a...


Latest Flatworm Reference Libraries

Nightcrawler, Lumbricus terrestris
2014-01-12 00:00:00

The nightcrawler (Lumbricus terrestris), also known as the lob worm or the common earthworm in Britain and the dew worm in Canada, is a species of earthworm that is classified within the Annelida phylum. It is native to Europe, but has been introduced into other areas around the world. Although the species is not as abundant as other worms in its range, it is a widely known species in gardens of temperate habitats, where it moves about on the surface of the soil. The nightcrawler can reach...

Rodent Tapeworm. Hymenolepis microstoma
2014-01-12 00:00:00

The rodent tapeworm (Hymenolepis microstoma) is a parasitic worm that is classified within the Platyhelminthes phylum. This species affects rodents across the world, causing hymenolepiasis, but it does not often affect humans. Most of the available information regarding tapeworms is derived from the studies conducted on this worm and the other members of its genus, Hymenolepis. These worms have been present in laboratories since the 1950's and can either be raised and kept in a culture or be...

Dwarf Tapeworm, Hymenolepis nana
2014-01-12 00:00:00

The dwarf tapeworm (Hymenolepis nana) is a species of tapeworm that is classified in the Platyhelminthes phylum. It once held three other scientific names including Vampirolepis nana and Taenia nana. It is found throughout the world but occurs most often in temperate regions. As its common name implies, the dwarf tapeworm is small, reaching an average body length of 1.5 inches. The head, or scolex, holds a retractable beak like organ that has twenty to thirty hooks and four string suckers,...

Beef Tapeworm
2014-01-12 00:00:00

The beef tapeworm (Taenia saginata or Taeniarhynchus saginata) is a species of tapeworm that is classified within the Platyhelminthes phylum. It can affect both cattle and humans, and causes the disease taeniasis in humans. It can be found in many areas that have a beef market including Africa, the Philippines, Latin America, and Eastern Europe, although it is not abundant in this area. It does occur in the United States, but it is not common due to high sanitation standards. The beef...

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Word of the Day
callithump
  • A somewhat riotous parade, accompanied with the blowing of tin horns, and other discordant noises; also, a burlesque serenade; a charivari.
'Callithump' is a back-formation of 'callithumpian,' a 'fanciful formation' according to the Oxford English Dictionary. However, the English Dialect Dictionary, says 'Gallithumpians' is a Dorset and Devon word from the 1790s that refers to 'a society of radical social reformers' or 'noisy disturbers of elections and meetings.'
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