Acta 801.
Need.
Brief
A
December
1977,
489-491.
p.
communications
Lagynion species
new
A.J.
26(6),
(Chrysophyceae)
Dop
Amsterdam
Vakgroep Planlensystematiek, Biologisch Laboratorium, Vrije Universiteit,
SUMMARY
Lagynion spiniferum
found
the Western
in
pond
n.
in the
growing
characterised
sp.,
mucilage
by delicate spines
investment
of
on
its
is described.
lorica,
collected
Draparnaldia plumosa
It
from
a
was
peat
of The Netherlands,
part
OBSERVATIONS
In
taken in
periphyton samples,
June
1976 from reed
stems
peat pond nine km South of Amsterdam, several large (one
of
Draparnaldia
fluid
ceae;
Chrysosphaera
Loricae of the
these
sp.,
latter
loricae
were
and sometimes bifurcated
In fig.
I,
depicted
view is
a
show
to
interference
are
phase
showing
This
and
a
contrast
alga
could
of
resp.
of
complete alga;
a
and
in
fig.
length
live cell
of
contrast
2
an
optics,
the
lorica is
empty
spines.
4 is
Fig.
spines
and
an
5 and 6
showing spines; figs.
empty lorica showing
an
species.
mucilage.
varying length.
of the
photograph
Lagynion
the
interference
copious
Chrysophy-
extremely delicate, irregularly placed
distribution, shape
views of
contrast
branched
and
phase-
a
a
cm) thalli
The
present.
and
Botshol,
three
contain three
freely throughout
possess
spines
presented
the
of
to
were
out to
Chod.,
aureus
distributed
found
Agardh
turned
algae
Stylococcus
were
When observed with the aid
Lagynion
C. A.
plumosa (Vauch.)
mucilage surrounding
in the
to
a
live cell
rhizopodium.
not
be identified with
any
description, prof. Bourrelly kindly
described
confirmed it
species;
to
be
from
to
new
drawings
science.
Diagnosis:
Lagynion spiniferum species
Lorica
globosa,
7 pm
alto. Paries loricae
ornata
numquam bifurcatis.
bilobato,
olei
nova.
lata, pariete claro,
collo
cylindrico,
spinis paulis, delicatissimis,
Cellula loricam fere
1.5
pm
ad 5 pm
replens, chloroplasto
lato
et
longis,
uno
1
pm
non-
parietali
luteo-brunneo. Duae vacuolae contractibiles in parte basali;
guttae
leucosinisetiam observatae.
Rhizopodium ad 25 pm longum.
atque vacuola
in fmem
raraosum.
Provenit
e
Zoosporae
nec
cystae observatae
sunt.
stagno “Botshol” prope oppido Abcoude,
parnaldiae plumosae
Iconotypus
est
libere distributum.
figura
nostra
1.
in
strato
mucoso
Dra-
490
A.
Fig. 1. Iconotype.
in lower
Lorica
part,
leucosin
lorica
Fig.
2.
Empty
Fig.
3.
Three
with
cell,
vacuole,
showing
oil
showing irregularly
irregularly shaped,
bilobed
droplets
and
chloroplast,
distributed
clustered
contractile
long rhizopodium
loricae
in
spines
and
mucilage
vacuoles located
branched
variation
J. DOP
at end.
in
of cultivated
spine length.
Draparnaldia
thallus.
Fig.
4. Interference
chloroplast,
Fig.
and
contrast
spines
5. Phase contrast
on
photograph
lorica
of live
cell
showing
leucosin
vacuole,
oil
droplets,
(arrow).
photograph of empty
lorica
showing spines,
one
of which is bifurcated
(arrow).
Fig.
6. Phase
contrast
photograph of
live
cell
showing long,
branched
rhizopodium (arrow).
A
NEW
LAGYNTON
Lorica
and
5 pm
Cell
and
a
the lorica
Two
chloroplast.
leucosin vacuole
Zoospores
is
of
our
very
1.5 pm wide
spines,
up
observed
are
as
the
near
well.
one
in
the
bilobed yellow-
parietal
basal
oil
part;
Rhizopodium
up
to
droplets
25 pm
long,
town
of
Abcoude,
distributed
freely
in the herbarium of the Free
containing Lagynion spiniferum
University.
was
cultivated for
time; this resulted in the formation of small clusters of cells showing
(fig. 3).
division
parent
lorica
irregular
shape
Whether the groups
preceding
cell could
zoid
not
a
an
globose species;
and difficult
to
something of
the
result of
original
clustering
subsequent
in the
state
in
of zoids
of zoids
settling
Eleutheropyxis
Closest relative is
its walls
character
observe.
an
the
were
to
the
or
a
field
of cell
near
the
be verified.
Lagynion.
outstanding
compared
formation and
Lagynion spiniferum belongs
of the genus
in
I.
deposited
thallus
Draparnaldia
somewhat
to
Draparnaldia plumosa.
fig.
Material has been
are
with
completely,
contractile vacuoles
“Bolshoi”
mucilage layer
also
slender
cysts have been observed.
nor
pond
Iconotype
some
neck
cylindrical
few
a
the end.
at
From the
The
with clear walls and
wall decorated with
sometimes bifurcated.
nearly filling
branched
the
Lorica
high.
long,
brown
7 pm wide,
globose,
1 pm
491
(CHRYSOPHYCEAE)
SPECIES
are
(Bourrelly
decorated with minute knobs.
for identification;
Their function
anchoring
section
1957)
Lagynion fulvum (Scherff.) Bourr.,
probably
in the rather fluid
they
is
are
to
mucilage
The
delicate,
provide
the
spines
however,
alga
with
of its host.
ACKNOWLEDGEMENT
The author is
indebted to prof,
dr, P.
Bourrelly, Paris,
for confirmation
of the identification
REFERENCE
Bourrelly,
matique.
P.
(1957):
Rev.
Recherches
Algol.,
sur
Mem. hors
les
ser.
Chrysophycees; Morphologie, Phylogenie, Syste-
1,
1412.