Swiss Journal of Palaeontology,
Год журнала:
2023,
Номер
142(1)
Опубликована: Апрель 25, 2023
Abstract
Strophodus
is
a
speciose
and
geographically
widespread
taxon
of
large
durophagous
hybodontiform
chondrichthyan,
with
stratigraphic
range
extending
from
Middle
Triassic
to
the
Early
Cretaceous.
Here,
we
describe
new
species
,
S
.
atlasensis
sp.
nov.,
based
on
an
incomplete
articulated
dentition
recovered
marine
Bajocian
deposits
eastern
High
Atlas
Mountains
in
Morocco.
The
diagnosed
by
unique
combination
dental
characters
that
includes,
among
others,
presence
triangular
first
lateral
teeth,
mesio-distally
wide
bulbous
second
teeth
without
occlusal
crest
or
dome
uniquely
shaped
posterior
are
shorter
than
being
labio-lingually
long,
as
well
small
whose
roots
protrude
below
crowns
meet
each
other
efficient
interlocking
manner.
holotype
only
specimen
nov.
represents
hitherto
oldest
known
record
Gondwana
genus
Bajocian,
thus
adding
valuable
novel
information
our
understanding
evolutionary
history
extinct
chondrichthyans.
Science,
Год журнала:
2023,
Номер
379(6632), С. 567 - 572
Опубликована: Фев. 10, 2023
Finely
preserved
fossil
assemblages
(lagerstätten)
provide
crucial
insights
into
evolutionary
innovations
in
deep
time.
We
report
an
exceptionally
Early
Triassic
assemblage,
the
Guiyang
Biota,
from
Daye
Formation
near
Guiyang,
South
China.
High-precision
uranium-lead
dating
shows
that
age
of
Biota
is
250.83
+0.07/–0.06
million
years
ago.
This
only
1.08
±
0.08
after
severe
Permian-Triassic
mass
extinction,
and
this
assemblage
therefore
represents
oldest
known
Mesozoic
lagerstätte
found
so
far.
The
comprises
at
least
12
classes
19
orders,
including
diverse
fish
fauna
malacostracans,
revealing
a
trophically
complex
marine
ecosystem.
Therefore,
demonstrates
rapid
rise
modern-type
ecosystems
extinction.
Earth-Science Reviews,
Год журнала:
2022,
Номер
234, С. 104196 - 104196
Опубликована: Сен. 28, 2022
The
Early
Jurassic
Jenkyns
Event
(∼183
Ma)
was
characterized
in
terrestrial
environments
by
global
warming,
perturbation
of
the
carbon
cycle,
enhanced
weathering
and
wildfires.
Heating
acid
rain
on
land
caused
a
loss
forests
affected
diversity
composition
plant
assemblages
rest
trophic
web.
We
suggest
that
Event,
triggered
activity
Karoo-Ferrar
Large
Igneous
Province,
pivotal
remodelling
ecosystems,
including
plants
dinosaurs.
Macroplant
palynological
data
show
reductions
richness
conifers,
cycadophytes,
ginkgophytes,
bennetitaleans,
ferns,
continuation
seasonally
dry
warm
conditions.
Major
changes
occurred
to
sauropodomorph
dinosaurs,
with
extinction
diverse
basal
families
formerly
called
‘prosauropods’
as
well
some
sauropods,
diversification
derived
Eusauropoda
Toarcian
South
America,
Africa,
Asia,
wider
new
families,
Mamenchisauridae,
Cetiosauridae
Neosauropoda
(Dicraeosauridae
Macronaria)
Middle
Jurassic,
showing
massive
increase
size
feeding
modes.
Ornithischian
dinosaurs
patchy
records;
heterodontosaurids
scelidosaurids
disappeared,
major
clades
(Stegosauridae,
Ankylosauridae,
Nodosauridae)
emerged
soon
after
Bajocian
Bathonian
worldwide.
Among
theropod
Coelophysidae
Dilophosauridae
died
out
during
theropods
(Megalosauroidea,
Allosauroidea,
Tyrannosauroidea)
this
event
substantial
increases
size.
then
crisis
marked
especially
floral
origins
clades,
increasing
body
Comparison
end
Triassic
Mass
Extinction
helps
understand
incidence
climatic
driven
large
igneous
provinces
ecosystems
their
great
impacts
early
dinosaur
evolution.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Сен. 9, 2023
Certain
times
of
major
biotic
replacement
have
often
been
interpreted
as
broadly
competitive,
mediated
by
innovation
in
the
succeeding
clades.
A
classic
example
was
switch
from
brachiopods
to
bivalves
seabed
organisms
following
Permian-Triassic
mass
extinction
(PTME),
~252
million
years
ago.
This
attributed
competitive
exclusion
better
adapted
or
simply
fact
that
had
hit
especially
hard
PTME.
The
brachiopod-bivalve
is
emblematic
global
turnover
marine
faunas
Palaeozoic-type
Modern-type
triggered
Here,
using
Bayesian
analyses,
we
find
unexpectedly
two
clades
displayed
similar
large-scale
trends
diversification
before
Jurassic.
Insight
a
multivariate
birth-death
model
shows
brachiopod
during
PTME
set
stage
for
switch,
with
differential
responses
high
ocean
temperatures
post-extinction
further
facilitating
their
displacement
bivalves.
Our
study
strengthens
evidence
and
were
not
competitors
over
macroevolutionary
time
scales,
events
environmental
stresses
shaping
divergent
fates.
Zoological Journal of the Linnean Society,
Год журнала:
2023,
Номер
202(1)
Опубликована: Сен. 16, 2023
Abstract
The
Mesozoic
Marine
Revolution
restructured
the
world’s
ocean
biodiversity
into
complex
marine
ecosystems
of
today.
This
revolution
began
during
Triassic
but
origin
this
complexity
is
poorly
understood
due
to
a
lack
detailed
ecosystem
reconstructions
throughout
time.
We
present
first
site-specific
ecological
network
for
fauna
based
on
Early
Cretaceous
Paja
Formation
biota
Colombia
that
preserves
numerous,
large-bodied,
predatory
reptiles.
trophic
food-web
was
quantitatively
reconstructed
inferred
interactions
producers,
consumers,
and
large
apex
predators.
Compared
well-studied
Caribbean
reef
networks,
missing
great
proportion
benthic
invertebrates
fishes,
despite
its
rich
higher
levels.
hypothesize
ammonites
from
either
mirrored
diversity
represented
by
some
fishes
today
or
established
novel
unit
with
no
living
analogue.
Recalibrating
analogues
in
Caribbean,
such
as
sea
turtles,
estimates
largest
reptile
hyper-apex
predators
occupied
levels
full
tier
than
any
extant
predator.
starting
point
tracing
evolution
across
Revolution.
The Anatomical Record,
Год журнала:
2024,
Номер
307(4), С. 713 - 721
Опубликована: Фев. 12, 2024
Abstract
The
Triassic
period
stands
as
a
crucial
moment
for
understanding
tetrapod
evolution,
marking
the
emergence
and
early
diversification
of
numerous
lineages
that
persist
in
today's
ecosystems.
Birds,
crocodiles,
testudines,
lizards,
mammals
can
all
trace
their
origins
to
Triassic,
which
is
distinguished
by
several
adaptive
radiation
events
fostered
unparalleled
diversity
body
plans
lifestyles.
Beyond
this
macroevolutionary
significance,
serves
fertile
ground
scientific
inquiry,
especially
studies.
aim
Special
Issue
assemble
diverse
array
new
contributions
focused
on
continental
tetrapods
globally,
encouraging
collaboration
among
researchers
across
generations,
pooling
efforts
comprehend
pivotal
evolutionary
history.
This
issue
encompasses
almost
40
varied
contributions,
spanning
topics
from
comparative
functional
anatomy,
including
descriptions
novel
taxa,
comprehensive
anatomical
reviews,
systematic
investigations,
phylogenetic
analyses,
paleoneurological
studies,
biomechanical
assessments,
detailed
examinations
histology
ontogeny.
Collectively,
offers
an
extensive
exploration
anatomical,
ecological,
perspectives,
unveiling
fresh
insights
into
intriguing
vertebrate
