Multiple lines of evidence support anagenesis in Daspletosaurus and cladogenesis in derived tyrannosaurines
Cretaceous Research,
Journal Year:
2025,
Volume and Issue:
unknown, P. 106080 - 106080
Published: Jan. 1, 2025
Language: Английский
A New Tyrant Dinosaur from the Late Campanian of Mexico Reveals a Tribe of Southern Tyrannosaurs
Fossil Studies,
Journal Year:
2024,
Volume and Issue:
2(4), P. 245 - 272
Published: Sept. 25, 2024
The
end
of
the
Cretaceous
saw
Western
Interior
Seaway
divide
North
America
into
two
land
masses,
Laramidia
in
west
and
Appalachia
east.
Laramidian
dinosaurs
inhabited
a
narrow
strip
extending
from
Mexico
to
Alaska.
Within
this
geographically
restricted
area,
evolved
high
diversity
endemism,
with
distinct
species
north
south.
Here,
we
report
new
tyrannosaurid
Late
Campanian-aged
Cerro
del
Pueblo
Formation
Coahuila,
Mexico,
which
is
part
tribe
tyrannosaurs
originating
southern
Laramidia.
Phylogenetic
analysis
recovers
tyrannosaur
as
clade
including
Labocania
anomala
La
Bocana
Roja
Baja
California
Norte,
Bistahieversor
sealeyi
Kirtland
New
Teratophoneus
curriei
Kaiparowits
Utah,
Dynamoterror
dynastes
Menefee
Mexico.
Distinct
frontal
morphology
younger
age
(~72.5–73
Ma
versus
>75.8
for
L.
anomala)
support
recognition
Labocania,
aguillonae.
dominated
at
time
when
was
by
daspletosaurins
albertosaurines.
endemism
seen
tyrannosaurids
remarkable,
given
that
modern
apex
predators
have
large
geographic
ranges
hints
carnivorous
has
been
underestimated.
Language: Английский
Anagenesis and the tyrant pedigree: A response to “Re-analysis of a dataset refutes claims of anagenesis within Tyrannosaurus-line tyrannosaurines (Theropoda, Tyrannosauridae)”
Cretaceous Research,
Journal Year:
2024,
Volume and Issue:
163, P. 105957 - 105957
Published: June 29, 2024
Taxonomic
diversity
in
the
derived
tyrannosaurine
Daspletosaurus
has
been
hypothesized
to
represent
a
variety
of
evolutionary
patterns
by
different
authors.
The
recent
description
D.
wilsoni,
third
species
this
genus,
was
proposed
support
paraphyly
and
participation
its
within
single
anagenetic
lineage
terminating
at
base
clade
formed
Tyrannosaurus
other
gigantic
tyrannosaurines
(Tarbosaurus,
Zhuchengtyrannus).
However,
reanalysis
including
additional
data
challenged
interpretation,
instead
recovering
as
monophyletic
sister
group
closest
relatives,
characterized
several
cladogenetic
events.
Here
we
show
that
incorporating
further
correcting
erroneous
interpretations
relevant
anatomical
features
overturns
result.
Using
novel
phylogenetic
analysis
specimens,
recover
paraphyletic
Daspletosaurus,
with
genus
forming
successive
taxa
Tyrannosaurus-line
tyrannosaurines.
This
result
facilitates
an
interpretation
currently
recognized
representing
lineage,
agreement
stratigraphic
distribution
specimens
qualitative
range
morphological
variation
observable
wilsoni.
Language: Английский