Phylum Ectoprocta: Features, Classification and Affinities.
Animal testing is already controlled to a great extent. Many cats and dogs are killed annually by shelters and pounds. Animal testing is not as cruel as it is portrayed and is an essential to reaching medical breakthroughs. Special controls on laboratory animals have been in place since 1876.
We present a consensus classification of life to embrace the more than 1.6 million species already provided by more than 3,000 taxonomists’ expert opinions in a unified and coherent, hierarchically ranked system known as the Catalogue of Life (CoL). The intent of this collaborative effort is to provide a hierarchical classification serving not only the needs of the CoL’s database providers.
In establishing classification schemes, when we cannot place a species with any previously established phylum—Loricifera, for example—we create a new place for it. In creating a new phylum, we set that phylum forth as a hypothesis to be tested by studying relationships.
The description of the new animal phyla Loricifera in 1983, Cycliophora in 1995 and Mycrognathozoa in 2000, the possibility that tropical arthropods alone could number over 10 million species, and the fact that over 12,000 new animal species are described yearly, exemplify how little is known regarding the magnitude of global species richness (World Conservation Monitoring Centre, 1992 for an.
You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them.
Grzimek's Animal Life Encyclopedia, state of the art taxonomy and naturalism, provides both generic, introductory information as well as species descriptions. The are chapters written well enough for the general scientific reader. No college or university library should be without this encyclopedic survey. Grzimek's Animal Life Encyclopedia.
This classification was the basis for Whittaker's later definition of Fungi, Animalia, Plantae and Protista as the four kingdoms of life. The kingdom Protista was later modified to separate prokaryotes into the separate kingdom of Monera, leaving the protists as a group of eukaryotic microorganisms.