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Evolutionary fauna : ウィキペディア英語版 | Evolutionary fauna The concept of the three great Evolutionary Faunas of marine animals from the Cambrian to the Present (that is, the entire Phanerozoic) was introduced by Jack Sepkoski in 1981 using factor analysis of the fossil record. An evolutionary fauna typically displays an increase in biodiversity following a logistic curve followed by extinctions (although the Modern Fauna has not yet exhibited the diminishing part of the curve). ==Cambrian fauna== Fauna I, known as "Cambrian", described as a "Trilobite-rich assemblage", encompasses the bulk of the fossils which first appeared in the Cambrian explosion, and largely went extinct in the Ordovician-Silurian extinction event, although the genus ''Lingula'' has survived to the present. This fauna is marked by fossils of the following classes: Trilobita, Polychaeta, Monoplacophora, Inarticulata.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Evolutionary fauna」の詳細全文を読む
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