- The
Givetian is one of two
faunal stages in the
Middle Devonian Period. It
lasted from 387.95
million years ago to 382.31
million years ago. It was preceded...
-
Grossaspis is a
monotypic genus of
antiarch placoderms known from the
Givetian age of Eifel, Germany. It is
represented by the
single species, Grossaspis...
-
Devonian (
Givetian-upper Frasnian)
Phoebodus curvatus Ivanov, 2021.
Russia (Urals), Poland, Australia. Middle-Late
Devonian (upper
Givetian-upper Frasnian)...
-
range is a
western extension of the Eifel; both were
raised during the
Givetian age of the
Devonian (382.7 to 387.7
million years ago), as were several...
-
extinction event that
occurred about 386
million years ago
during the
Givetian faunal stage of the
Middle Devonian geologic period in the
Paleozoic era...
- late Pragian,
after 409.1 mya) into
Taghanic event during upper middle Givetian (between 385 and 384 mya),
existing for
approximately 25
million years...
-
comprised two subdivisions:
first the Eifelian,
which then gave way to the
Givetian at 387.95 Ma.
During this time, the
jawless agnathan fishes began to decline...
-
estimates ranging from 500,000 to 25
million years,
extending from the mid-
Givetian to the end-Famennian. Some
consider the
extinction to be as many as seven...
- the type and
youngest species,
Microbrachius ****i, is
known from
upper Givetian freshwater strata of
Scotland and Estonia. When
Microbrachius was regarded...
- The
Middle Devonian epoch is
subdivided into two stages:
Eifelian and
Givetian. In the
middle Devonian the
armored jawless fish
known as ostracoderms...
