Phylogenomic species delimitation of studfishes (Fundulidae: Fundulus): evidence for cryptic species in agreement with the central highlands vicariance hypothesis
Zootaxa,
Journal Year:
2025,
Volume and Issue:
5604(3), P. 309 - 328
Published: March 13, 2025
The
Central
Highlands
ecoregion
of
the
eastern
United
States
represents
a
hotspot
freshwater
biodiversity,
with
replicated
patterns
vicariant
speciation
east
and
west
Mississippi
River.
Previous
phylogeographic
investigation
studfishes
(Fundulus
subgenus
Fundulus)
revealed
evidence
for
in
Highlands,
but
data
were
limited
to
small
number
gene
sequences
generated
Sanger
sequencing.
We
used
double
digest
restriction-site
associated
DNA
sequencing
(ddRADseq)
improve
resolution
better
characterize
population
genetic
variation.
Our
sample
design
included
individuals
from
Fundulus
catenatus
species
group
(F.
catenatus,
F.
bifax,
stellifer)
two
outgroup
taxa
julisia
rathbuni).
Phylogenetic
analyses
support
monophyletic
complex
sister
relationship
Mobile
Basin
bifax
stellifer).
Population
genomics
delimitation
tests
provide
three
species-level
subdivisions
catenatus.
describe
as
Tennessee
River
its
drainages,
caddo
sp.
nov.,
Ouachita
cryptocatenatus
occupying
remainder
range.
Modally,
was
characterized
by
fewer
left
pectoral
rays
(16
vs.
17).
nov.
had
modally
anal
(15
16)
lateral
scale
rows
(13
14).
higher
dorsal
14)
caudal
geographic
distribution
is
likely
result
multiple
pre-Pleistocene
vicariance
events
congruent
Vicariance
Hypothesis
well
separate,
possibly
subsequent,
dispersal
events.
Overall,
results
this
study
corroborate
previous
biogeographic
history
endemic
rivers
ecoregion.
improved
genomic
variation
among
studfish
populations
will
guide
future
studies
morphological
conservation
plans
rare
biodiversity
hotspot.
Language: Английский
Revision of the Pultenaea setulosa species complex (Fabaceae: Mirbelieae) including 14 new species
Australian Systematic Botany,
Journal Year:
2024,
Volume and Issue:
37(2)
Published: Feb. 20, 2024
A
taxonomic
revision
of
the
Pultenaea
setulosa
species
complex
(Fabaceae,
tribe
Mirbelieae)
is
presented.
Prior
to
this
study,
P.
Benth.
was
broadly
circumscribed
as
a
single,
morphologically
variable
species.
Here,
we
present
evidence
supporting
recognition
18
species,
14
which
are
new
science.
recircumscribed
uniform
taxon
endemic
Marlborough
region
in
south-east
Queensland.
We
reinstate
boormanii
H.B.Will.,
campbellii
Maiden
&
Betche
and
lapidosa
Corrick
from
synonymy
describe
an
additional
species:
acanthocalyx
R.L.Barrett
Clugston,
corrickiae
R.L.Barrett,
Orme
estelleae
farmeriana
P.H.Weston,
hoskingii
imminuta
S.F.McCune,
murrayi
palssoniae
praetermissa
Albr.,
purdieae
renneri
venusta
Orme,
westonii
Clugston
woolcockiorum
Clugston.
Sixteen
these
New
South
Wales,
one
Queensland
Victoria.
All
taxa
described
illustrated,
habitats
conservation
status
discussed.
Two
related
procumbens
A.Cunn.
setigera
ex
recircumscribed.
reinstated
here,
known
type
collection
made
1822
possibly
extinct.
Lectotypes
selected
for
names
boormanii,
campbellii,
procumbens,
setulosa.
Language: Английский
Using molecular and morphometric data as operational criteria for the analysis of a threatened rainforest species complex shows interspecific variation, with implications for cryptic-species delimitation and conservation
Australian Systematic Botany,
Journal Year:
2024,
Volume and Issue:
37(2)
Published: April 4, 2024
Resolution
of
systematic
associations
and
species
boundaries
is
vital
for
developing
conservation
priorities
threatened
taxa.
A
complex
Fontainea
(Euphorbiaceae)
populations,
endemic
to
rainforest
communities
in
central-eastern
Australia,
comprises
several
taxonomically
challenging
species.
oraria
Critically
Endangered,
with
only
one
natural
population
10
mature
individuals,
the
closely
related
F.
australis
being
listed
as
Vulnerable.
recently
discovered
(currently
nominated
sp.
Coffs
Harbour)
taxonomic
similarities
has
been
provisionally
fewer
than
40
individuals.
This
study
employed
an
integrative
approach,
combining
genetic
data
morphometrics
determine
three
groups
a
model
system
approach
delimiting
cryptic
Although
our
results
suggest
potential
subdivision
into
taxa,
caution
warranted
because
this
hypothesis
remains
inconclusive.
Taxonomic
challenges
demand
careful
acknowledging
possibility
alternative
interpretations.
Contrary
supporting
distinct
species,
morphological
may
also
be
interpreted
indicative
single
geographic
variation,
phenomenon
observed
genetically
linked
populations
experiencing
isolation
by
distance.
Overall,
we
highlight
need
further
research
establish
limits
guide
actions.
Language: Английский