The name of the acritarchs is first derived from the paleontologist Evitt in 1966 which means “uncertain of origin”. The group is named artificially not found in nature as same fossils in the rocks record under this group. Because acritarchs are still unknown organism. many research has been done so far but the exact origin of acritarchs has not been identified. Based on the evidence, some, scientist claimed them to be similar with the algae, probably the cysts of planktonic eukaryotic algae, the carbon isotope study of the acritarch say the delta 13 carbon value is similar with the planktonic marine algae. (Kliti Grice et al 2005).
the size range between 20-80 micron of acritarchs. The acritarchs are mainly unicellular and can be identified using a light microscope. they are characterized by the varied sculpture and spiny and smooth in the surface. sometimes spike of the acritarchs ca not be found due to a heavy treatment of the laboratory experiments. so, during the laboratory experiment, one must be careful to use very carefully to get the unaltered fossils. the acritarchs are mainly the organic-walled microfossils of uncertain of origins.
Size and age ranges of acritarch:
Classification of acritarch: