- published: 29 Jan 2016
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The Platyzoa /ˌplætᵻˈzoʊ.ə/ are a group of protostome animals proposed by Thomas Cavalier-Smith in 1998. Cavalier-Smith included in Platyzoa the Phylum Platyhelminthes or flatworms, and a new phylum, Acanthognatha, into which he gathered several previously described phyla of microscopic animals. Subsequent studies have supported Platyzoa as a clade, a monophyletic group of organisms with a common ancestor, while differing on the phyla included and on relationships within Platyzoa.
One current scheme places the following traditional phyla in Platyzoa:
None of the Platyzoa groups have a respiration or circulation system because of their small size, flat body or parasitic lifestyle. The Platyhelminthes and Gastrotricha are acoelomate. The other phyla have a pseudocoel, and share characteristics such as the structure of their jaws and pharynx, although these have been secondarily lost in the parasitic Acanthocephala. They form a monophyletic subgroup called the Gnathifera.
Nat Geo Wild (stylized as Nat Geo WILD or abbreviated as NGW) is a cable/satellite TV channel focused primarily on wildlife and natural history programming. It is a sister network to National Geographic Channel and it is the latest channel to be jointly launched by the National Geographic Society and Fox Cable Networks.
It first launched in Hong Kong on January 1, 2006. The channel later launched in the United Kingdom, Turkey, Ireland, Romania, India, Vietnam, and Poland replacing the now defunct Adventure One. The channel remains the world's first bilingual wildlife service, available in English and Cantonese in the Hong Kong market as well as Tagalog in The Philippines. The channel launched in Latin America on November 1, 2009 as a high definition channel. In 2010, it launched in the United States.
As of February 2015, approximately 57,891,000 American households (49.7% of households with television) receive Nat Geo Wild.
The channel launched in South Africa in mid-2009, and is available on the South African Satellite Network DSTV.
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Platyzoa The Platyzoa /ˌplætɨˈzoʊ.ə/ are a group of protostome animals proposed by Thomas Cavalier-Smith in 1998.Cavalier-Smith included in Platyzoa the Phylum Platyhelminthes or flatworms, and a new phylum, Acanthognatha, into which he gathered several previously described phyla of microscopic animals. =======Image-Copyright-Info======= Image is in public domain Author-Info: Jan Derk Image Source: https://en.wikipedia.org/wiki/File:Bedford's_Flatworm.jpg =======Image-Copyright-Info======== -Video is targeted to blind users Attribution: Article text available under CC-BY-SA image source in video https://www.youtube.com/watch?v=zoTiJ4O2OZg
For flatworms, "Who's your daddy?" is a loaded question. In a bizarre bout lasting up to an hour, the first flatworm to stab and inseminate its mate becomes the father. ➡ Subscribe: http://bit.ly/NatGeoWILDSubscribe ➡ Get More World’s Weirdest: http://bit.ly/WorldsWeirdest About World's Weirdest: A buffalo with three eyes, an exterminator who eats his day’s work, an elephant rampage through a restaurant…all very bizarre, all very real. These shocking and strange animal “viral” moments only found on World’s Weirdest. Each one-hour episode explores the most bizarre in the animal kingdom. Freaky Feasts wets our appetite for the weirdest animal meals ever. Oddities is a showcase for the most unusual animals. Sneak Attacks features the most shocking animal encounters ever. And let's spread a l...
Rotifera Fossil range: Eocene - Recent Rotaria Rotaria Scientific classification Domain: Eukarya Kingdom: Animalia Subkingdom: Eumetazoa Superphylum: Platyzoa Phylum: Rotifera Cuvier, 1798 Classes Monogononta Digononta Seisonidea The rotifers, or rotifaers, make up a phylum of microscopic and near-microscopic pseudocoelomate animals. They were first described by Rev. John Harris in 1696 and other forms were described by Anton van Leeuwenhoek in 1703.[1] Most rotifers are around 0.1-0.5 mm long (although their size can range from 50μm to over 2 millimeters) [2], and are common in freshwater environments throughout the world with a few saltwater species. Some rotifers are free swimming and truly planktonic, others move by inchworming along the substrate, and some are ses...
Domain: Eukaryota () - Whittaker & Margulis,1978 - eukaryotes Kingdom: Animalia () - C. Linnaeus, 1758 - animals Subkingdom: Bilateria () - (Hatschek, 1888) Cavalier-Smith, 1983 Branch: Protostomia () - Grobben, 1908 Infrakingdom: Platyzoa () - T. Cavalier-Smith, 1998 Superphylum: Gnathifera () Phylum: Rotifera () - Cuvier, 1798 - Rotifers Order: Bdelloida () Family: Philodinidae () Genus: Philodina () - Ehrenberg, 1830 Specific name: roseola - Ehrenberg, 1832 Scientific name: - Philodina roseola Ehrenberg, 1832 Notes
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Watch a tiny animal (rotifer) in a drop of water under the microscope roaming around amyl flakes in biology class. The water was taken from a common faucet. The amyl was added. Biology class - Aristotle University of Thessaloniki, 2011 Ένα τροχοφόρο βολτάρει ανάμεσα σε νυφάδες αμύλου σε μια σταγόνα νερού κάτω από το μικροσκόπιο! Τμήμα Βιολογίας - Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης 2011 Kingdom: Animalia (unranked): Platyzoa Phylum: Rotifera tiny microscopic creature, wheel animal
Whole mount of a spiny-headed worm (Acanthocephala) under 50x magnification.
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[chorus]
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