A review of the non‐semiaquatic adaptations of extinct crocodylomorphs throughout their fossil record
The Anatomical Record,
Год журнала:
2024,
Номер
308(2), С. 266 - 314
Опубликована: Ноя. 25, 2024
Abstract
Crocodylomorphs
constitute
a
clade
of
archosaurs
that
have
thrived
since
the
Mesozoic
until
today
and
survived
numerous
major
biological
crises.
Contrary
to
historic
belief,
their
semiaquatic
extant
representatives
(crocodylians)
are
not
living
fossils,
and,
during
evolutionary
history,
crocodylomorphs
evolved
live
in
variety
environments.
This
review
aims
summarize
non‐semiaquatic
adaptations
(i.e.,
either
terrestrial
or
fully
aquatic)
different
groups
from
periods,
highlighting
how
exactly
those
lifestyles
inferred
for
animals,
with
regard
geographic
temporal
distribution
phylogenetic
relationships.
The
ancestral
condition
Crocodylomorpha
seems
been
lifestyle,
linked
several
morphological
such
as
an
altirostral
skull,
long
limbs
allowing
erect
posture
specialized
dentition
diets
based
on
land.
However,
some
members
this
clade,
thalattosuchians
dyrosaurids
display
opposite,
aquatic
interestingly
same
type
observations.
Finally,
new
techniques
inferring
paleobiology
extinct
animals
put
forward
last
decade,
appearing
complementary
approach
traditional
descriptions
comparisons.
Such
is
case
paleoneuroanatomical
(CT
scan
data),
histological,
geochemical
studies.
Язык: Английский
Neurocranial anatomy of Paralligator (Neosuchia: Paralligatoridae) from the Upper Cretaceous of Mongolia
Zoological Journal of the Linnean Society,
Год журнала:
2024,
Номер
203(1)
Опубликована: Дек. 13, 2024
Abstract
Neurocranial
features
appear
to
be
phylogenetically
informative
and
key
in
assessing
the
still
contentious
relationships
within
Crocodylomorpha.
However,
braincases
of
many
non-crocodylian
taxa
are
incompletely
studied
precluding
assessment
evolutionary
modifications
at
base
Crocodylia.
Here,
we
describe
braincase
osteology
neuroanatomy
paralligatorid
crocodylomorph
Paralligator
from
Upper
Cretaceous
Mongolia
based
on
computed
tomography
(CT)-scanning,
segmentation,
3D
modelling
several
specimens.
The
anatomy
brain
endocast,
nerves,
paratympanic
pneumatic
cavities
is
consistent
with
its
phylogenetic
position
close
or
Eusuchia.
shares
a
suit
neuroanatomical
basal
eusuchians
crocodylians
reflecting
plesiomorphic
condition
for
In
addition,
differences
endocasts
between
larger-sized
individuals
Kansajsuchus
smaller
Shamosuchus
ontogenetic
changes
extant
crocodylians.
This
suggests
that
members
more
clade
Paralligatoridae
crown-group
Crocodylia
share
similar
during
ontogeny.
We
also
review
distribution
mesethmoid
Crocodylomorpha
show
presence
clades
including
Dyrosauridae.
Язык: Английский