The sperm structure of the diving beetles Stictonectes optatus (Seidlitz, 1887) and Scarodytes halensis (Fabricius, 1787) (Dytiscidae, Hydroporinae) with evidence of a spermatostyle in the sperm conjugation.
Micron,
Journal Year:
2023,
Volume and Issue:
166, P. 103412 - 103412
Published: Jan. 5, 2023
The
structure
of
the
male
genital
organs
and
spermiogenesis
two
diving
beetles,
Stictonectes
optatus
Scarodytes
halensis
were
studied
for
first
time.
S.
shows
unifollicular
testes
consisting
a
long
tubule
apically
forming
globular
structure.
deferent
duct
epithelia
show
secretory
activity
involved
in
spermatostyle
organization.
They
are
connected
with
very
large
accessory
glands.
Sc.
has
more
common
apparatus
cylindrical
ducts.
glands
smaller
than
those
optatus.
sperm
both
species
is
characterized
by
small
acrosome,
flattened
nucleus
lateral
extension
containing
centriole
from
which
flagellum
originates.
Both
exhibit
conjugation
bundles
showing
nuclei
orderly
arranged
sperm-heads
stacks
free
flagella.
In
addition,
thick
layer
secretion
surrounds
these
sperm-head
stacks.
Such
considered
spermatostyle.
This
finding
represents
record
about
presence
this
among
Dytiscidae.
flagellum,
typical
axoneme
9
+
2
microtubular
complex,
mitochondrial
derivatives
present
species.
Those
have
peculiar
shape
apical
side,
cross-section,
displaying
pointed
corners.
Two
bodies
located
between
derivatives.
Language: Английский
Beyond bees and butterflies: The role of beetles in pollination system
Jacob Muinde,
No information about this author
Daniel Mutavi Katumo
No information about this author
Journal for Nature Conservation,
Journal Year:
2023,
Volume and Issue:
77, P. 126523 - 126523
Published: Nov. 24, 2023
Language: Английский
Proteomic diversification of spermatostyles among six species of whirligig beetles
Molecular Reproduction and Development,
Journal Year:
2024,
Volume and Issue:
91(5)
Published: May 1, 2024
Abstract
Seminal
fluid
protein
composition
is
complex
and
commonly
assumed
to
be
rapidly
divergent
due
functional
interactions
with
both
sperm
the
female
reproductive
tract
(FRT),
of
which
evolve
rapidly.
In
addition
sperm,
seminal
may
contain
structures,
such
as
mating
plugs
spermatophores.
Here,
we
investigate
evolutionary
diversification
a
lesser‐known
ejaculate
structure:
spermatostyle,
has
independently
arisen
in
several
families
beetles
true
bugs.
We
characterized
spermatostyle
proteome,
FRT
morphology,
six
species
whirligig
(family
Gyrinidae).
Spermatostyles
were
enriched
for
proteolytic
enzymes,
assays
confirmed
they
possess
activity.
Sperm‐leucylaminopeptidases
(S‐LAPs)
particularly
abundant,
their
localization
spermatostyles
was
by
immunohistochemistry.
Although
there
evidence
conservation
proteomes
across
species,
phylogenetic
regressions
suggest
covariation
between
morphology
FRTs.
postulate
that
S‐LAPs
(and
other
proteases)
have
evolved
novel
structural
role
discuss
adaptations
delivering
male‐derived
materials
females.
Language: Английский
The Cap and the Spermatostyle Protecting the Sperm Bundle Have a Similar Origin—Ultrastructural Study of the Spermatogenesis from the Ground Beetle Carabus (Chaetocarabus) lefebvrei Dejean, 1826 (Adephaga Carabidae)
Insects,
Journal Year:
2024,
Volume and Issue:
15(11), P. 864 - 864
Published: Nov. 5, 2024
The
males
of
Language: Английский
Morphology of the Female and Male Reproductive Tracts and More Data on the Spermatostyle in the Brazilian Gyretes sp. (Coleoptera, Adephaga, Gyrinidae)
Karen Salazar,
No information about this author
Ademária Moreira Novais,
No information about this author
José Lino‐Neto
No information about this author
et al.
Microscopy and Microanalysis,
Journal Year:
2023,
Volume and Issue:
29(6), P. 2184 - 2203
Published: Nov. 22, 2023
We
investigated
the
male
and
female
reproductive
tracts
of
Gyretes
sp.
with
light
transmission
electron
microscopies.
The
has
a
pair
testes
single
coiled
follicle,
followed
by
short
efferent
ducts,
which
have
similar
shape
diameter
to
testes.
Long
ducts
(epididymides)
differential
epithelium
open
in
long
vasa
deferentia
that
lead
accessory
glands.
Glycoprotein
secretions
from
vas
deferens
constitute
spermatostyle
for
spermatozoa
aggregation.
numerous
ovarioles
per
ovary,
fertilization
duct,
an
gland,
elongated
vagina.
Spermatozoa
are
stored
as
unaggregated
cells
duct.
In
Gyrinidae,
glands
show
diverse
shapes,
sperm
storage
organs
vary
shape,
size,
type
may
play
role
interaction
aggregates.
Testes
follicle
opening
features
shared
other
Gyrinidae
Adephaga.
proposed
adding
this
latter
trait
characterize
suborder
beetles.
morphology
both
sexes
contributes
comparative
analyses
knowledge
biology
provide
additional
systematics.
Language: Английский