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Cambria. Cambria is a name for Wales, being the Latinised form of the Welsh name for the country, Cymru. [1] The term was not in use during the Roman (when Wales had not come into existence as a distinct entity) or the early medieval period. After the Anglo-Saxon settlement of much of Britain, a territorial distinction developed between the new ...
Cambrian. g. g. FAD of the Conodont Iapetognathus fluctivagus. The Cambrian ( / ˈkæmbri.ən, ˈkeɪm -/ KAM-bree-ən, KAYM-) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. [5] The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran period 538.8 Ma (million years ago) to the beginning of ...
Burgessomedusa. Burgessomedusa is an extinct, monotypic genus of macroscopic free-swimming cnidarians from the middle Cambrian Burgess Shale in Canada. The type species is Burgessomedusa phasmiformis. The genus was characterized by the bell -like body with about 90 short tentacles. They led a predatory lifestyle and reached a length of 20 cm.
Wiwaxia is a genus of soft-bodied animals that were covered in carbonaceous scales and spines that protected it from predators. Wiwaxia fossils—mainly isolated scales, but sometimes complete, articulated fossils—are known from early Cambrian and middle Cambrian fossil deposits across the globe. [4][6][7] The living animal would have ...
Proterozoic: this eon refers to the time from the lower Cambrian boundary, 538.8 Ma, back through 2500 Ma. As originally used, it was a synonym for "Precambrian" and hence included everything prior to the Cambrian boundary. [citation needed] The Proterozoic Eon is divided into three eras: the Neoproterozoic, Mesoproterozoic and Paleoproterozoic.
Pikaia gracilens is an extinct, primitive chordate animal known from the Middle Cambrian Burgess Shale of British Columbia.Described in 1911 by Charles Doolittle Walcott as an annelid, and in 1979 by Harry B. Whittington and Simon Conway Morris as a chordate, it became "the most famous early chordate fossil", [1] or "famously known as the earliest described Cambrian chordate". [2]
Wuliuan. g. g. FAD of Oryctocephalus indicus. The Wuliuan stage is the fifth stage of the Cambrian, and the first stage of the Miaolingian Series of the Cambrian. It was formally defined by the International Commission on Stratigraphy in 2018. [5] Its base is defined by the first appearance of the trilobite species Oryctocephalus indicus; it ...
Well-preserved basal arthropod Opabinia from Burgess Shale Lagerstätte (Middle Cambrian) . A Fossil-Lagerstätte (German: [ˈlaːɡɐˌʃtɛtə], from Lager 'storage, lair' Stätte 'place'; plural Lagerstätten) is a sedimentary deposit that exhibits extraordinary fossils with exceptional preservation—sometimes including preserved soft tissues.