Echinoderm
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Echinoderms are a phylum of marine animals. Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone. Aside from the problematic Arkarua, the first definitive members of the phylum appeared near the start of the Cambrian period. The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates; they are also the largest phylum that has no freshwater or terrestrial representatives. The Echinoderms are important both biologically and geologically: biologically because few other groupings are so abundant in the biotic desert of the deep sea, as well as the shallower oceans, and geologically as their ossified skeletons are major contributors to many limestone formations, and can provide valuable clues as to the geological environment. Further, it is held by some that the radiation of echinoderms was responsible for the Mesozoic revolution of marine life.
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GarantieWeitere Informationen
- Allgemeine Informationen
- GTIN 09786130264314
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Sprache Englisch
- Größe H220mm x B150mm x T8mm
- Jahr 2009
- EAN 9786130264314
- Format Fachbuch
- ISBN 978-613-0-26431-4
- Titel Echinoderm
- Untertitel Phylum, Ocean, Animal, Intertidal zone, Abyssal zone, Arkarua, Cambrian, Species, Deuterostome, Chordate, Greek language, Mesozoic Marine Revolution, Sea star, Brittle star, Sea urchin, Sand dollar
- Gewicht 227g
- Herausgeber Alphascript Publishing
- Anzahl Seiten 140
- Genre Biologie
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