Extended Observation Descriptions
Extended Observation Description on Raphidocystis pallida
Raphidocystis pallida (F. E. Schulze, 1874) Zlatogursky, 2018
Heliozoa as Neuston Members
In a Petri dish containing sample water from a small pond, two feeding communities of Raphidocystis pallida could be observed using the dissecting microscope next to the chitin shell of a dead mosquito on the water surface.
Fig. 1: Feeding community of Raphidocystis pallida. Scale bar indicates 100 µm.
Sample from Pond Suploch, Hiddensee (Germany) Latitude: 54.538638, Longitude: 13.097802.
Fig. 2: Picture detail showing the nucleus (arrowhead) and the contractile vacuole (arrow). The centroplast is faintly visible (blue arrow).
Scale bar indicates 50 µm.
Fig. 3: In Raphidocystis the spiculae also adhere a short distance along the axopodia.
Scale bar indicates 10 µm.
Typical for Raphidocystis are the numerous 10–30 µm long, needle-like silicate scales (spiculae), which are arranged tangentially in a mucilaginous sheath. This thick cuticle scatters light a lot, so it was not easy to get a sufficiently clear view of the centroplast and the nucleus. Unfortunately, the Fig. 2 don’t show the centroplast clearly. The centroplast is the origin and organizing center of the microtubules, which in bundles stabilize the axopodia, the radiating pseudopods of the heliozoa. This structure is characteristic for the order Centroplasthelida, to which the genus Raphidocystis belongs (Fig. 1–3).
© Wolfgang Bettighofer,
images under Creative Commons License V 3.0 (CC BY-NC-SA).
For permission to use of (high resolution) images please contact postmaster@protisten.de.
New items
striolatum
teliferum
pseudopyramidatum
pyramidatum
scabrum
capitulum
forficulatum
oligacanthum
var. incisum
chlamydosporum
arcuatum
var. subavicula
truncata
var. quadrata
rubescens
venustum
var. excavatum
ralfsii
var. montanum
ralfsii
digitus
acerosum
intermedium
dissiliens
kuetzingii
ralfsii
var. hybridum
aureus
botrytis
quadratum
quadrum
crassa
digitus
var. lamellosum
digitus
var. latum
oblongum
interruptum
spec.
spec.
kinahanii
spec.
polymorphum
var. polymorphum
brebissonii
rotata
swartzii
antilopaeum
neosinuosum
thomasiana
var. notata
forficulatum
var. verrucosum
armatum
oblongum
rhomboidale
furcatum
uncinatum
hirsutum
cucurbitinum
minor
borreri
americana
coeseli
apiculata
simplicius
crassum
simonyi
var. sparsiaculeatum
caelatum
crux-melitensis
ehrenbergii
didelta
spongiosum
var. perbifidum
denticulata
dejectus
conspersum
papillifera
komarekii
arboricola
venustum
var. excavatum
pulchellum
tripus
subspicatus
convergens
nostochinearum
arcuata
grevillei
laevis
var. laevis
reticulatum
viridis
cystozygote
reinhardtii
lacustris
speculum
New items
striolatum
teliferum
pseudopyramidatum
pyramidatum
scabrum
capitulum
forficulatum
oligacanthum
var. incisum
chlamydosporum
arcuatum
var. subavicula
truncata
var. quadrata
rubescens
venustum
var. excavatum
ralfsii
var. montanum
ralfsii
digitus
acerosum
intermedium
dissiliens
kuetzingii
ralfsii
var. hybridum
aureus
botrytis
quadratum
quadrum
crassa
digitus
var. lamellosum
digitus
var. latum
oblongum
interruptum
spec.
spec.
kinahanii
spec.
polymorphum
var. polymorphum
brebissonii
rotata
swartzii
antilopaeum
neosinuosum
thomasiana
var. notata
forficulatum
var. verrucosum
armatum
oblongum
rhomboidale
furcatum
uncinatum
hirsutum
cucurbitinum
minor
borreri
americana
coeseli
apiculata
simplicius
crassum
simonyi
var. sparsiaculeatum
caelatum
crux-melitensis
ehrenbergii
didelta
spongiosum
var. perbifidum
denticulata
dejectus
conspersum
papillifera
komarekii
arboricola
venustum
var. excavatum
pulchellum
tripus
subspicatus
convergens
nostochinearum
arcuata
grevillei
laevis
var. laevis
reticulatum
viridis
cystozygote
reinhardtii
lacustris
speculum