How the neurosensory system provides clues for the adaptive radiation of mammals
Elsevier eBooks,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Language: Английский
The dawn of an Era: New contributions on comparative and functional anatomy of Triassic tetrapods
The Anatomical Record,
Journal Year:
2024,
Volume and Issue:
307(4), P. 713 - 721
Published: Feb. 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
Language: Английский
Volumetric versus Element-scaling Mass Estimation and Its Application to Permo-Triassic Tetrapods
Integrative Organismal Biology,
Journal Year:
2024,
Volume and Issue:
6(1)
Published: Jan. 1, 2024
Synopsis
Size
has
an
impact
on
various
aspects
of
animal's
biology,
including
physiology,
biomechanics,
and
ecology.
Accurately
precisely
estimating
size,
in
particular
body
mass,
is
therefore
a
core
objective
paleobiologists.
Two
approaches
for
mass
are
common:
whole-body
volumetric
models
individual
element-scaling
(e.g.,
bones,
teeth).
The
latter
been
argued
to
be
more
accurate,
while
the
former
precise.
Here,
we
use
minimum
convex
hulls
(MCHs)
generate
predictive
model
across
broad
taxonomic
size
range
(127
g
–
2735
kg).
We
compare
our
MCH
stylopodial-scaling,
incorporating
data
from
literature,
find
that
estimation
both
accurate
precise
than
stylopodial
estimation.
An
explanation
difference
between
methods
reptile
mammal
stylopod
circumference
length
dimensions
scale
differentially
(slope
1.179
±
0.102
vs.
1.038
0.031,
respectively),
such
reptiles
have
robust
bones
given
size.
Consequently,
mammalian-weighted
stylopodial-scaling
sample
overestimates
larger
reptiles,
this
error
increases
with
apply
equations
12
Permo-Triassic
tetrapods
consistently
estimates
higher
estimation,
due
even
extinct
species
=
1.319
0.213).
Finally,
take
advantage
explore
constraints
regarding
position
center
(CoM)
relative
proportions
(i.e.,
skull:tail
ratio)
influence
CoM
differently
mammals,
crocodylians,
tetrapods.
Further,
clade-specific
segment
expansion
factors
do
not
affect
group
comparisons
but
may
important
specimens
rather
disproportionate
bodies
small-headed
large-tailed
Edaphosaurus).
Our
findings
suggest
approach
better
suited
when
anatomies
beyond
scope
used
scaling
provides
added
benefits
as
ability
measure
inertial
properties.
Language: Английский
Craniodental reinterpretations and new specimens of Protuberum cabralense, a bizarre traversodontid cynodont from the earliest Late Triassic of Brazil
Journal of South American Earth Sciences,
Journal Year:
2024,
Volume and Issue:
unknown, P. 105213 - 105213
Published: Oct. 1, 2024
Language: Английский
Brazilian fossils reveal homoplasy in the oldest mammalian jaw joint
Nature,
Journal Year:
2024,
Volume and Issue:
634(8033), P. 381 - 388
Published: Sept. 25, 2024
The
acquisition
of
the
load-bearing
dentary-squamosal
jaw
joint
was
a
key
step
in
mammalian
evolution
Language: Английский
Shell Constraints on Evolutionary Body Size–Limb Size Allometry Can Explain Morphological Conservatism in the Turtle Body Plan
Ecology and Evolution,
Journal Year:
2024,
Volume and Issue:
14(11)
Published: Nov. 1, 2024
Turtles
are
a
small
clade
of
vertebrates
despite
having
existed
since
the
Late
Triassic.
have
conservative
body
plan
relative
to
other
amniotes,
characterized
by
presence
shell
and
quadrupedality.
This
morphology
is
even
retained
in
strong
ecological
specialists,
such
as
sea
turtles,
which
secondarily
adapted
marine
locomotion
allometric
scaling
their
hands.
It
possible
that
turtles
strongly
influenced
shell,
acting
constraint
achieving
greater
diversity
forms.
Here,
we
explore
evolutionary
relationships
fore-
hindlimb
stylopodia
(i.e.,
humerus
femur)
with
one
another
well
relationship
size
(carapace
length)
assess
evidence
constraint.
All
including
Triassic
shelled
stem
near-isometric
do
not
vary
between
clades,
evolve
at
slow
rates.
indeed
indicates
proportions
constrained
narrow
range
possibilities.
Minor
deviations
seen
highly
aquatic
softshell
modified
shells
bone
losses.
Our
regressions
allow
accurate
estimations
for
fossils.
Several
independent
turtle
lineages
converged
on
maximum
sizes
2.2
m
length,
may
be
biological
group.
Language: Английский