Flying turtles in the earliest trees of life: scientific transparency in the phylogenetic works of Ernst Haeckel
Swiss Journal of Palaeontology,
Journal Year:
2025,
Volume and Issue:
144(1)
Published: March 27, 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
Trifold origin of the reptilian ear ossicle and its relation to the evolutionary modification of the temporal skull region
Journal of Anatomy,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 19, 2024
Abstract
Whereas
mammals
are
characterized
by
the
presence
of
three
middle
ear
ossicles,
reptiles
have
only
one,
columella
(stapes).
Nevertheless,
there
is
a
great
diversity
columellar
anatomy
among
sauropsids,
especially
in
unique
and
cartilaginous
“extracolumella”‐portion.
Molecular
studies
revealed
“columella”
chicken
quails
to
be
formed
within
second
pharyngeal
arch,
although
conflicting
evidence
exists
for
footplate
distal
parts
these
birds.
We
studied
development
four
turtles,
one
lizard,
caiman
species
argue,
using
early
blastematous
stages,
that,
distally,
so‐called
“extracolumella”
turtles
mainly
quadrate,
that
is,
first
arch
origin.
Differently,
dorsal
aspect
lizard
part
“dorsal
process”
likely
quadrate‐derived.
This
indicates
partial
homology
compartments
reptiles.
Moreover,
we
observed
most
at
differentiates
from
otic
capsule,
which
confirms
widespread
experimental
findings
mesodermal
cells
contributing
proximal
columella.
provide
hypothetical
framework
changes
quadrate
morphology
reptilian
evolution.
Originally,
as
evidenced
fossil
record,
served
stabilizing
brace
between
braincase.
Associated
with
feeding
mode
late
Permian
taxa,
was
integrated
along
stress
flows
biting,
differentiated
differently
contribute
“columella‐complex,”
now
contacts
tympanic
membrane.
In
addition,
original
capsule
contributes
mobile
columella,
providing
connection
inner
ear.
Language: Английский
Remarks on the functional morphology of the earliest mammals
Mammalian Biology,
Journal Year:
2024,
Volume and Issue:
104(6), P. 739 - 749
Published: July 17, 2024
Abstract
The
earliest
mammals
are
characterized
by
a
series
of
derived
characters
when
compared
to
their
synapsid
predecessors.
In
comparison
non-mammalian
synapsids,
these
features
include
highly
efficient
teeth,
small
body
size,
parasagittal
limb
posture,
as
well
reduced
number
ribs
and
girdle
elements
light-weighted
tails.
We
argue
that
the
mammalian
construction
its
functionality
constituted
set
partially
interrelated
morphological
traits,
including
akinetic
skulls,
tooth
anatomy,
food
processing;
locomotor
speed,
tail
reduction;
posture
elements;
torsion
rib
reduction.
By
discussing
from
biomechanical
view,
we
demonstrate
high
speed
was
most
important
evolutionary
advantage
over
larger
ancestors,
dinosaurs
at
end
Mesozoic.
Language: Английский
Terrestrialisation and the cranial architecture of tetrapods
Fossil record,
Journal Year:
2024,
Volume and Issue:
27(3), P. 473 - 497
Published: Dec. 27, 2024
Using
four
extinct
land
vertebrate
species
as
examples,
I
discuss
ontogenetic
strategies
well
the
potential
influence
of
bite-
and
other
external
forces
on
formation
skull.
In
principle,
areas
under
biomechanical
stress
are
strongly
ossified,
whereas
regions
with
little
or
no
show
only
weak
ossification.
this
regard,
all
plates,
arcades
openings
skull
–
even
in
that
multi-fenestrated
dinosaurs
can
be
explained.
trace
changes
feeding
mode
body
posture
at
transition
from
semi-aquatic
to
fully
terrestrial
tetrapods
position
bite
points.
Through
evolution,
an
increasing
force
is
argued
have
a
crucial
new
openings,
such
supratemporal
antorbital
fenestrae
archosaurs,
by
changing
direction
flows
The
conquest
was
also
associated
appearance
novel
types
behaviour
inter-
intraspecific
combats.
Horns
cranial
weapons
were
formed
repeatedly,
which
shown
alter
construction
when
receiving
forces.
Changes
biomechanics
postcranial
skeletal
anatomy.
Additionally,
vice
versa,
neck
muscles
important
impact
differentiation
tetrapod
Finally,
hypothesis
provided
for
evolution
temporal
based
considerations.
argue
synapsid
(infrafenestral)
morphotype
ancestral
amniotes
related
strong
anterior
mouth.
Along
reptilian
lineage
many
parareptiles,
captorhinids
turtles
fenestration
repeatedly
closed
stiffening
region
response
addition,
upper
opening
evolved
first
diapsid
(bifenestral)
secondary.
“triapsid”
ceratopsid
concentrated
animal’s
frill.
Language: Английский
New chelid turtle with a flattened skull from the Late Cretaceous of Northern Patagonia, Argentina
Alcheringa An Australasian Journal of Palaeontology,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 6
Published: Nov. 25, 2024
The
skull
morphology
of
fossil
chelids
is
poorly
known
because
their
record
scarce.
Here,
we
describe
a
new
genus
and
species
flat-headed
chelid
turtle
based
on
partial
skull.
remains
derive
from
the
Maastrichtian
(Late
Cretaceous)
upper
section
Allen
Formation
at
Morales
Quarry,
near
General
Roca
city
in
Río
Negro
province
Argentina.
taxon
belongs
to
long-necked
group
Hydromedusinae
preserves
anterior
part
skull,
which
unknown
other
members
clade.
Despite
being
incomplete,
provides
valuable
information
about
cranial
extinct
turtles.
Language: Английский