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The Warrawoona Group is a geological unit in Western Australia containing putative fossils of cyanobacteria cells. Dated 3.465 Ga, these microstructures, found in Archean chert, are considered to be the oldest known geological record of life on Earth. [1] [2] [3]
A stalked crinoid (white) and a comatulid (red) in deep sea, showing the differences between these two sister groups. Most modern crinoids, i.e., the feather stars, are free-moving and lack a stem as adults. Examples of fossil crinoids that have been interpreted as free-swimming include Marsupites, Saccocoma and Uintacrinus. [23]
Western Pacific [62]: 112 [20]: 102 Allagecrinus. Carpenter & Etheridge 1881 A. austinii Carpenter & Etheridge, 1881 Allagecrinidae extinct Devonian (Famernnian) to Pennsylvanian (Bashkirian) North America, United Kingdom [63]: 282 Allionia [wiki link is to a plant, not the crinoid] Michelotti 1861 A. oblita Michelotti, 1861
Dimerocrinites is an extinct genus of crinoids that lived from the Silurian to the Early Devonian of Australia and North ... Fossils (Smithsonian Handbooks) by David ...
Fossils discovered in Australia reveal hundreds of new species, a pollen-covered insect, parasitic larva, and fish with last meals in their stomachs.
The Gogo Formation in the Kimberley region of Western Australia is a Lagerstätte that exhibits exceptional preservation of a Devonian reef community. The formation is named after Gogo Station, a cattle station where outcrops appear and fossils are often collected from, [1] as is nearby Fossil Downs Station.
Pentacrinites is an extinct genus of crinoids that lived from the Hettangian to the Bathonian of Asia, Europe, North America, and New Zealand.Their stems are pentagonal to star-shaped in cross-section and are the most commonly preserved parts. [1]
This genus is known in the fossil record from the Devonian period to the Permian period (age range: 360.7 to 290.1 million years ago). [3] Fossils of species within this genus have been found in Australia, China, Europe and United States.