Cladistic estimates of evolutionary rates focused on palaeontological datasets using TNT
Cladistics,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 30, 2025
Abstract
We
describe
a
protocol
for
estimating
evolutionary
rates
from
phylogenetic
trees
based
on
parsimony
character
optimization.
The
rate
estimation
is
conducted
through
TNT
script
and
the
results
are
analysed
in
software
environment
R.
allows
analysing
multiple
optimal
topologies,
considering
optimization
ambiguity,
alternative
time‐calibrations
or
pre‐calibrated
trees.
R
summarizes
estimated
consensus
tree
plots
variation
of
time,
jointly
with
diversity
new
metric
(clade
completeness
index)
that
measures
distribution
missing
data
along
tree.
present
simulated
empirical
analyses,
evaluate
impact
calibration
methods
estimates.
found
while
can
lower
nominal
values
rates,
overall
pattern
time
remained
robust.
Empirical
cases
highlight
different
scenarios,
such
as
datasets
which
peaks
be
coupled
decoupled
diversification
dynamics
(phylogenetic
diversity)
may
influence
rates.
conclude
recommendations
using
this
interpreting
parsimony‐based
Язык: Английский
The neodiapsid Thadeosaurus colcanapi from the upper Permian of Madagascar
Papers in Palaeontology,
Год журнала:
2025,
Номер
11(2)
Опубликована: Март 1, 2025
Abstract
The
enigmatic
neodiapsid
Thadeosaurus
colcanapi
(Lower
Sakamena
Formation,
southwestern
Madagascar),
sole
species
of
the
genus
,
is
revised
here.
attribution
12
21
referred
specimens
confirmed,
spanning
all
ontogenetic
stages,
and
anatomy
redescribed
in
detail
with
comments
on
ontogenetical
differences.
This
new
anatomical
information
included
an
expanded
phylogenetical
dataset
tailored
to
examine
relationships
Permo‐Triassic
diapsids.
A
stem‐saurian
position
confirmed
here
for
‘younginiforms’,
which
are
recovered
paraphyletic,
Youngina
representing
earlier‐diverging
taxon.
However,
this
topology
extremely
labile,
monophyly
or
paraphyly
‘younginiforms’
could
not
be
unequivocally
supported.
In
contrast,
our
analyses
provide
good
support
a
monophyletic
Tangasauridae
including
other
‘younginiforms’.
as
member
sister‐group
putative
semi‐aquatic
Tangasaurinae
moderate
degree
support,
despite
large
amounts
missing
data
lesser‐known
tangasaurids
partially
obscuring
understanding
tangasaurid
interrelationships.
Last,
considered
have
inhabited
nearshore,
probably
riparian,
environment,
although
it
remains
unclear
whether
was
fully
terrestrial.
Further
examinations
tangasaurids,
well
novel
morphotype
identified
Lower
Formation
Madagascar,
evidence
deepen
evolution
palaeoecology
Tangasauridae.
Язык: Английский
The dawn of an Era: New contributions on comparative and functional anatomy of Triassic tetrapods
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
Язык: Английский
Triassic non-marine vertebrate diversity of India: status report (2020–2024)
DELETED,
Год журнала:
2024,
Номер
90(2), С. 347 - 357
Опубликована: Апрель 28, 2024
Язык: Английский
Assessing predator–prey interactions during the Late Triassic of India from bite marks on Hyperodapedon (Archosauromorpha, Rhynchosauria)
Journal of Vertebrate Paleontology,
Год журнала:
2024,
Номер
44(1)
Опубликована: Янв. 2, 2024
Multiple
cranial
and
mandibular
remains
of
Hyperodapedon
huxleyi
known
from
the
lower
part
Upper
Triassic
Maleri
Formation
were
examined
to
reveal
distinct
bite
marks.
These
identified
as
punctures
based
on
their
circular
or
oval
elliptical
outline
deep
penetration
into
cortical
bone,
found
associated
with
several
bone-damaging
features
such
radiating
fractures,
serrated
boundaries,
collapsed
bony
surface.
In
addition,
traces
drag
marks
in
form
parallel
grooves
U-shaped
cross
sections
are
identified.
The
compared
dental
morphology
varied
Late
carnivores
India,
probable
producers
suggested
be
phytosaurs
dinosauriforms.
trophic
structure
food
web
is
reconstructed
interconnectedness
between
different
animal
groups,
unconfined
feeding
habits
animals
where
predators
inclined
towards
opportunistic
rather
than
a
niche-based
dietary
habit.
study
highlights
significance
reconstruction
ancient
paleoecosystems.
Язык: Английский
The biogeographic history of the allokotosaurian archosauromorphs in the Triassic of Pangaea
Historical Biology,
Год журнала:
2024,
Номер
unknown, С. 1 - 6
Опубликована: Окт. 15, 2024
Allokotosauria
(Trilophosauridae
+
Azendohsauridae)
is
a
clade
of
Early
–
Late
Triassic
quadruped,
sprawling
archosauromorphs
with
diverse
dietary
habits,
known
from
Madagascar,
India,
Morocco,
North
America,
and
Europe.
We
conducted
the
first
quantitative
biogeographic
analysis
to
reconstruct
its
ancestral
areas
dispersal
events.
The
results
estimated
India
Tanzania
area
as
for
Allokotosauria.
Eastern
America
was
reconstructed
Trilophosauridae,
implying
an
Southern
Northern
Hemisphere
dispersal.
Subsequently,
trilophosaurids
were
restricted
Hemisphere,
at
least
two
events
Europe
western
are
during
early
Anisian
probably
Carnian,
respectively.
Azendohsauridae
retained
much
evolutionary
history.
Two
eastern
respectively,
Carnian
Norian,
likely
or
in
aftermath
Pluvial
Episode
(CPE).
This
pattern
mirrors
that
dinosaurs,
which
dispersals
not
recorded
until
end
CPE.
study
informs
about
patterns
involved
biotic
recovery
after
end-Permian
mass
extinction
radiation
Archosauromorpha.
Язык: Английский