MavicaNET - Pogonofora

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Pogonofora
	Catalogo / Natura / Vita / Animali / Pogonofora
	Catalogo / Cultura / Scienza / Biologia / Biologia degli organismi / Zoologia / Zoologia e anatomia comparativa degli invertebrati / Pogonofora
	Catalogo / Cultura / Scienza / Biologia / Biologia degli organismi / Zoologia / Tassonomia: Animali (Animalia) / Tipi degli animali / Pogonofora

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Natural History - Phylogeny
The phylogeny of living organisms has changed dramatically in the past few years. As a consequence you will find that different sites may given different, and sometimes conflicting, systematic arrangements for the same group of organisms. No where is this more true than for the "lower organisms", i.e. those groups traditionally treated as bacteria, protozoans, algae and fungi. The traditional older arrangement divided live into two main group; the Monera (bacteria and blue-green algae) and the Eucaryotes (protozoa, algae, plants, fungi, and animals). This older scheme was surplanted by the so-called "Five Kingdom Classification" created by Robert Whittaker. [eng]

Animals - CACB Biota
Diversity of Animals, History of Animals, Links. [eng]

GIF image 236x384 pixels
Photo. [eng]

Pogonophora
Part of Tree of Life - Classification from Brusca and Brusca (1990). [eng]

Tube worms [This Dynamic Earth, USGS]
Photo. [eng]

Introduction to the Pogonophora
About 80 pogonophoran species are known today, with new species still being discovered. One of the most spectacular zoological discoveries of recent years was the finding in 1977 of giant pogonophoran worms, 1.5 meters long, growing in heated, sulfur-rich water around warm-water vents in the Pacific Ocean, 2600 meters below the surface (pictured at right). These worms are sometimes placed in their own phylum, the Vestimentifera, but they are similar to pogonophorans in most respects, and the current tendency is to group these rift-dwelling worms together with the rest of the Pogonophora into one phylum. [eng]

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