- 3rd
stage of the Cambrian. The
stage approximately corresponds to the "
Atdabanian",
which is used by
geologists working in Siberia. The
oldest trilobite...
- to archaeocyaths.
Radiocyaths reached their maximum abundance in the
Atdabanian and Botomian,
contributing towards the biom**** of
archaeocyath sponge...
- Bengtson,
Matthews et Missarzhevsky, 1981;
Lower Cambrian,
Atdabanian Stage, Kazakhstan;
Atdabanian and
Botomian Stages,
Russia (Siberian Platform) and England;...
-
appearance of
trilobites in the
fossil record defines the base of the
Atdabanian stage of the
Early Cambrian period (521 million
years ago) and they flourished...
-
Branchian /
Comley (part)
Toyonian Dyeran Botomian "Stage 3"
Nangaoan Atdabanian Montezuman Placentian /
Comley (part)
Terreneuvian "Stage 2" Meishucunian...
- In
other regions of the world, they
appeared much later,
during the
Atdabanian, and
quickly diversified into over a
hundred families. They
became the...
- –
Atdabanian 3]
Ramifer Jankauskas, 1969 [Tommotian 2 –
Atdabanian 4]
Family Vologdinophyllidae Radugin, 1964
Manaella Jankauskas, 1964 [
Atdabanian 1]...
-
extinct arthropods, the trilobites, that
lived during the
Lower Cambrian (
Atdabanian) in what are now Scandinavia,
Poland and Morocco.
Holmia is the Latin...
- rhynchonelliforms,
restricted to the lower-middle part of the
Cambrian Period ("
Atdabanian" [stage 3] to "Mayan" [late Miaolingian]).
Despite this
short span of...
-
extinct animal belonging to the
annelids and
lived in the
Early Cambrian (
Atdabanian in the
local timescale,
about 520
million years ago).
Fossils have only...
