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Geologic time scale — This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga.[1] Other… … Wikipedia
Rhynchonellida — Taxobox image width = 240px image caption = Hiscobeccus capax name = Rhynchonellida regnum = Animalia phylum = Brachiopoda classis = Rhynchonellata ordo = Rhynchonellida ordo authority = Kuhn, 1949 subdivision ranks = Superfamilies subdivision =… … Wikipedia
Taxonomy of commonly fossilised invertebrates — Although the phylogenetic classification of sub vertebrate animals (both extinct and extant) remains a work in progress, the following taxonomy attempts to be useful by combining both traditional (old) and new (21st century) paleozoological… … Wikipedia
Devonian Period — Interval of geologic time from 417 to 354 million years ago; it was the fourth period of the Paleozoic Era. During the Devonian, a giant continent was situated in the Southern Hemisphere (see Gondwana), and other landmasses were located in the… … Universalium
Frasnian Stage — ▪ paleontology lowermost of the two standard worldwide divisions of Late Devonian (Devonian Period) rocks and time. Frasnian time occurred between 385.3 million and 374.5 million years ago. The stage s name is derived from the town of… … Universalium

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