During the Phanerozoic the biodiversity shows a steady but not monotonic increase from near zero to several thousands of genera. Biodiversity is the variation of Life forms within a given Ecosystem, Biome or for the entire Earth.

The Phanerozoic (occasionally Phanaerozoic) Eon is the current eon in the geologic timescale, and the one during which abundant animal life has existed. The geologic time scale is a chronologic schema (or idealized Model) relating Stratigraphy to time that is used by Geologists and other It covers roughly 545 million years and goes back to the time when diverse hard-shelled animals first appeared. Its name derives from the Greek meaning visible life, referring to the large size of organisms since the Cambrian explosion. The Cambrian explosion or Cambrian radiation was the seemingly rapid appearance of most major groups of complex Animals around, as evidenced by the The time previous to the start of the Phanerozoic was formerly called the Precambrian (now divided into the Hadean, Archaean and Proterozoic eons). The Precambrian ( Pre-Cambrian) is an informal name for the supereon comprising the eons of the Geologic timescale that came before the current The Hadean (ˈheɪdiən is the geologic eon before the Archean. The Proterozoic (ˌproʊtərəˈzoʊɪk is a geological eon representing a period before the first abundant complex life on Earth. The exact time of the boundary between the Phanerozoic and the Proterozoic is slightly uncertain. The Proterozoic (ˌproʊtərəˈzoʊɪk is a geological eon representing a period before the first abundant complex life on Earth. In the 19th Century, the boundary was set at the first abundant metazoan fossils. The 19th century of the Common Era began on January 1, 1801 and ended on December 31, 1900, according to the Gregorian calendar FOSSIL is a standard protocol for allowing serial communication for Telecommunications programs under the DOS Operating system. But several hundred taxa of Proterozoic metazoa have been identified since systematic study of those forms started in the 1950s. A taxon (plural taxa) or taxonomic unit, is a name designating an organism or a group of Organisms In Biological nomenclature according to The Proterozoic (ˌproʊtərəˈzoʊɪk is a geological eon representing a period before the first abundant complex life on Earth. Most geologists and paleontologists would probably set the Proterozoic-Phanerozoic boundary either at the classic point where the first trilobites and archaeocyatha appear; at the first appearance of a complex feeding burrow called Trichophycus pedum; or at the first appearance of a group of small, generally disarticulated, armored forms termed 'the small shelly fauna'. A geologist is a contributor to the Science of Geology, studying the physical structure and processes of the Earth and planets of the solar system Palaeontology redirects here For the Scientific journal, see Palaeontology (journal. Trilobites ("three-lobes" are extinct Arthropods that form the class Trilobita. The Archaeocyatha or archaeocyathids ("ancient cups" were Sessile Trichophycus pedum (or Treptichnus pedum; formerly Phycodes pedum) is regarded as the earliest widespread complex Trace fossil The small shelly fauna or small shelly fossils, abbreviated to SSF, are mineralized Fossils many only a few millimetres long with a nearly The three different dividing points are within a few million years of each other.

The Phanerozoic is divided into three eras: the Paleozoic, Mesozoic, and Cenozoic. The Paleozoic or Palaeozoic Era (from the Greek palaio (παλαιο "old" and zoe (ζωη "life" meaning "ancient life" The Mesozoic Era is one of three geologic eras of the Phanerozoic eon. The Cenozoic (also Caenozoic or Cainozoic) Era (ˌsiːnəˈzoʊɪk/ /ˌsɛn- (meaning "new life" ( Greek ( kainos) "new" In the older literature, the term Phanerozoic is generally used as a label for the time period of interest to paleontologists, but that use of the term seems to be falling into disuse in more modern literature.

The time span of the Phanerozoic includes the rapid emergence of a number of animal phyla; the evolution of these phyla into diverse forms; the emergence of terrestrial plants; the development of complex plants; the evolution of fish; the emergence of terrestrial animals; and the development of modern faunas. A phylum ( Plural: phyla) is a Taxonomic rank between Kingdom and above Class. eVolution is the third Album by eLDee, it was due to be released in 2008 Plants are living Organisms belonging to the kingdom Plantae. Fish are aquatic Vertebrate animals that are typically ectothermic (previously Cold-blooded) covered with scales, and equipped with two During the period covered, continents drifted about, eventually collected into a single landmass known as Pangea and then split up into the current continental landmasses. A continent is one of several large Landmasses on Earth. They are generally identified by Convention rather than any strict criteria with seven regions Pangaea, Pangæa or Pangea (pænˈdʒiːə from παν pan, meaning entire, and Γαῖα Gaea, meaning Earth in

See also

• Geologic time scale
• Paleoclimatology
• Plate tectonics

References

• Alexander V. Markov, and Andrey V. Korotayev (2007) "Phanerozoic marine biodiversity follows a hyperbolic trend" Palaeoworld 16(4): pp. 311-318. The geologic time scale is a chronologic schema (or idealized Model) relating Stratigraphy to time that is used by Geologists and other Paleoclimatology (also Palaeoclimatology) is the study of Climate change taken on the scale of the entire History of Earth. Plate tectonics (from Greek τέκτων tektōn "builder" or "mason" describes the large scale motions of Earth 's Lithosphere
• Miller, K. G. et al. (2005) "The Phanerozoic record of global sea-level change" Science 310(5752): pp. 1293-1298.