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Acritarchs (from Gr**** achritos 'uncertain' and arché 'origin') are
organic microfossils,
known from the
Precambrian to the present. The classification...
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skeletons or
microbial cysts from the Chrysophyta, Pyrrhophyta, Sarcodina,
acritarchs and chitinozoans,
together with
pollen and
spores from the
vascular plants...
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lophostriata from
North China,
lived approximately 1.65
billion years ago. Some
acritarchs are
known from at
least 1.65
billion years ago, and a fossil, Grypania...
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Magosphaera Meringosphaera Meteora Parakaryon (?)
Quasibodo Tetrahelia Acritarchs and
other fossils †Algospongia †Archaeochaeta †Cephalonyx †Changchengia...
- 100 m
thick glauconitic silt-sandstone
occasionally bearing extremely acritarch-rich
phosphatic pebbles;
gradually transitioning upwards into the upper...
- are
thought to be 551 to 635
million years old or Ediacaran.
Ediacaran acritarchs also have many
similarities with
Glomeromycotan vesicles and spores. It...
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Tappania is an
acanthomorph acritarch found in late Paleoproterozoic,
Mesoproterozoic and
Neoproterozoic rocks. The
oldest examples are
around 1630 million...
- S****yousphaeridium is an
extinct genus of
acritarch discovered in 1993.
Dated to 1.8Ga, it
represents one of the
earliest fossil eukaryote taxa. It is...
- gl**** negatives. He
first described chitinozoans and many
species of
acritarchs,
dinoflagellate cysts and graptolites. In 1973 he
became an
honorary member...
-
worldwide occurrence of the
Pertatataka ****emblage of
giant acanthomorph acritarchs. The
Ediacaran Period (c. 635–538.8 Mya)
represents the time from the...
