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Tiny Organisms in Aquatic Habitats
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and Chlorobi
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Golden-brownish-
colored Algae
Green-colored
Algae (1)
Green-colored
Algae (2):
Desmids sensu lato
Reddish-colored
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Organisms grouped by Taxonomy
Extended Observation Descriptions
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Amoeboid Protists
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Naked Amoebae
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Saccamoeba limax
Hunting for
Pyxidicula
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Testate Amoebae
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Pyxidicula
spec. as a Neuston Organism
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Heliozoic Amoebae
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Defecation in
Nuclearia
spec.
Nuclearia delicatula
, a Multinucleated Organism
Cell Division in
Nuclearia simplex
Raphidocystis pallida
as Neuston Member
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Chlorophytes
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Chlorella
spec. as Zoochlorellae
Cystozygotes of
Eremosphaera viridis
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Streptophytes (Desmids)
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Mitochondria in
Micrasterias
Dictyosomes in
Micrasterias
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Ciliates
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Fine Structure of
Coleps hirtus
Carapace
Platycola longicollis
on Java Moss
Binary Fission in
Vorticella
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Diatoms
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Sexual Reproduction of
Melosira inflexa
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Cnidaria
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Fine Structure of
Hydra viridissima
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Rotifers
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Ptygura kostei
on Java Moss
Ptygura longicornis
on Java Moss
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Home
Bacteria
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Proteobacteria
Cyanobacteria and Chlorobi
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Algae without Flagella
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Diatoms
Other Golden-brownish-colored Algae
Green-colored Algae (1)
Green-colored Algae (2): Desmids sensu lato
Reddish-colored Algae
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Amoeboid Protists
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Naked Amoebae
Testate Amoebae
Heliozoic Amoebae
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Ciliates
Diatoms
Flagellate Organisms
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Colored Flagellates
Colorless Flagellates
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Metazoa
Organisms grouped by Taxonomy
Extended Observation Descriptions
Close
Amoeboid Protists
Close
Naked Amoebae
Close
Saccamoeba limax
Hunting for
Pyxidicula
Close
Testate Amoebae
Close
Pyxidicula
spec. as a Neuston Organism
Close
Heliozoic Amoebae
Close
Defecation in
Nuclearia
spec.
Nuclearia delicatula
, a Multinucleated Organism
Cell Division in
Nuclearia simplex
Raphidocystis pallida
as Neuston Member
Close
Close
Chlorophytes
Close
Chlorella
spec. as Zoochlorellae
Cystozygotes of
Eremosphaera viridis
Close
Streptophytes (Desmids)
Close
Mitochondria in
Micrasterias
Dictyosomes in
Micrasterias
Close
Ciliates
Close
Fine Structure of
Coleps hirtus
Carapace
Platycola longicollis
on Java Moss
Binary Fission in
Vorticella
Close
Diatoms
Close
Sexual Reproduction of
Melosira inflexa
Close
Cnidaria
Close
Fine Structure of
Hydra viridissima
Close
Rotifers
Close
Ptygura kostei
on Java Moss
Ptygura longicornis
on Java Moss
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Metazoa – Obazoa (Opisthokonta)
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Porifera
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Ephydatia fluviatilis
Spongilla lacustris
Hydrozoa
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Cordylophora caspia
Craspedacusta sowerbii
Hydra viridissima
Laomedea flexuosa
Annelida
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Spirorbis
spec.
Bryozoa
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Bryozoa species
Fredericella sultana
Plumatella
spec.
Crustacea
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Bosmina longirostris
Daphnia pulex
Rotifera
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Bdelloidae
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Philodina megalotrocha
Rotaria tardigrada
Collothecaceae
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Collotheca
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Collotheca
spec.
Collotheca ornata
Stephanoceros fimbriatus
Flosculariaceae
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Floscularia ringens
Ptygura
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Ptygura
spec.
Ptygura brachiata
Ptygura kostei
Ptygura longicornis
Ptygura pilula
Hexarthra
spec.
Filinia longiseta
Ploima
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Asplanchna priodonta
Brachionus
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Brachionus
spec.
Brachionus angularis bidens
Brachionus bidentatus
Keratella
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Keratella
spec.
Keratella cochlearis
Notommata allantois
Polyarthra
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Polyarthra
spec.
Polyarthra remata
Synchaeta
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Synchaeta
spec.
Synchaeta pectinata
Echinodermata
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Asterozoa species
Chordata
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Teleostei species
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All Items
Porifera
Ephydatia fluviatilis
Spongilla lacustris
Hydrozoa
Cordylophora caspia
Craspedacusta sowerbii
Hydra viridissima
Laomedea flexuosa
Annelida
Spirorbis
spec.
Bryozoa
Bryozoa species
Fredericella sultana
Plumatella
spec.
Crustacea
Bosmina longirostris
Daphnia pulex
Rotifera
Bdelloidae
Philodina megalotrocha
Rotaria tardigrada
Collothecaceae
Collotheca
Collotheca
spec.
Collotheca ornata
Stephanoceros fimbriatus
Flosculariaceae
Floscularia ringens
Ptygura
Ptygura
spec.
Ptygura brachiata
Ptygura kostei
Ptygura longicornis
Ptygura pilula
Hexarthra
spec.
Filinia longiseta
Ploima
Asplanchna priodonta
Brachionus
Brachionus
spec.
Brachionus angularis bidens
Brachionus bidentatus
Keratella
Keratella
spec.
Keratella cochlearis
Notommata allantois
Polyarthra
Polyarthra
spec.
Polyarthra remata
Synchaeta
Synchaeta
spec.
Synchaeta pectinata
Echinodermata
Asterozoa species
Chordata
Teleostei species
Illustrated Key for
Metazoa – Obazoa (Opisthokonta, Protostomia)
Crustacea
Bosmina
longirostris
Daphnia
pulex
Bosmina
longirostris
Daphnia
pulex
© Wolfgang Bettighofer 2023–2024
New items
Cylindrocystis
crassa
Netrium
digitus
var.
lamellosum
Netrium
digitus
var.
latum
Netrium
oblongum
Planotaenium
interruptum
Spirogyra
spec.
Zygnema
spec.
Gonatozygon
kinahanii
Mougeotia
spec.
Penium
polymorphum
var.
polymorphum
Mougeotia
spec.
Penium
spirostriolatum
Netrium
digitus
Cylindrocystis
brebissonii
Micrasterias
rotata
Desmidium
swartzii
Staurastrum
capitulum
Xanthidium
antilopaeum
Euastrum
neosinuosum
Tetmemorus
brebissonii
Cosmarium
pachydermum
Micrasterias
thomasiana
var.
notata
Euastrum
ansatum
Staurastrum
forficulatum
var.
verrucosum
Cosmarium
neodepressum
Xanthidium
armatum
Euastrum
oblongum
Cosmarium
porteanum
Micrasterias
truncata
Euastrum
rhomboidale
Staurastrum
furcatum
Xanthidium
uncinatum
Hyalotheca
dissiliens
Cosmarium
pseudonitidulum
var.
validum
Micrasterias
truncata
var.
bahusiensis
Euastrum
bidentatum
Staurastrum
hirsutum
Actinotaenium
cucurbitinum
Hyalotheca
minor
Cosmarium
pyramidatum
Micrasterias
truncata
var.
quadrata
Euastrum
binale
var.
gutwinskii
Staurastrum
inconspicuum
Bambusina
borreri
Micrasterias
americana
Cosmarium
quadratulum
Pleurotaenium
trabecula
var.
elongatum
Euastrum
coeseli
Staurastrum
margaritacaeum
Cosmarium
bicuneatum
Micrasterias
apiculata
Cosmarium
simplicius
Pleurotaenium
crenulatum
Euastrum
crassum
Staurastrum
simonyi
var.
sparsiaculeatum
Cosmarium
caelatum
Micrasterias
crux-melitensis
Cosmarium
sparsepunctatum
Pleurotaenium
ehrenbergii
Euastrum
didelta
Staurastrum
spongiosum
var.
perbifidum
Cosmarium
connatum
Micrasterias
denticulata
Cosmarium
subarctoum
Pleurotaenium
trabecula
var.
trabecula
Euastrum
humerosum
Staurastrum
teliferum
Staurodesmus
dejectus
Pandorina
spec.
Cosmarium
conspersum
Lemmermannia
komarekii
Micrasterias
papillifera
Trebouxia
arboricola
Cosmarium
venustum
var.
excavatum
Eremosphaera
viridis
Spondylosium
pulchellum
Goniochloris
tripus
Tetmemorus
granulatus
var.
granulatus
Desmodesmus
subspicatus
Euastrum
humerosum
var.
affine
Glaucocystis
nostochinearum
Staurodesmus
convergens
Raphidocelis
arcuata
Cosmarium
integrum
Volvox
aureus
Micrasterias
rotata
Crucigeniella
lunaris
Desmidium
grevillei
Dimorphococcus
lunatus
Staurastrum
alternans
Microspora
irregularis
Tetmemorus
laevis
var.
laevis
Dictyosphaerium
ehrenbergianum
Euastrum
luetkemuelleri
var.
carniolicum
Hydrodictyon
reticulatum
Stauridium
tetras
Pseudostaurastrum
limneticum
Eremosphaera
viridis
cystozygote
Hindakia
tetrachotoma
Monactinus
simplex
var.
sturmii
Parapediastrum
biradiatum
Coelastrum
microporum
var.
octaedricum
Pediastrum
braunii
Chlamydomonas
reinhardtii
Micractinium
pusillum
Haematococcus
lacustris
Octactis
speculum
Ceramium
diaphanum
New items
Cylindrocystis
crassa
Netrium
digitus
var.
lamellosum
Netrium
digitus
var.
latum
Netrium
oblongum
Planotaenium
interruptum
Spirogyra
spec.
Zygnema
spec.
Gonatozygon
kinahanii
Mougeotia
spec.
Penium
polymorphum
var.
polymorphum
Mougeotia
spec.
Penium
spirostriolatum
Netrium
digitus
Cylindrocystis
brebissonii
Micrasterias
rotata
Desmidium
swartzii
Staurastrum
capitulum
Xanthidium
antilopaeum
Euastrum
neosinuosum
Tetmemorus
brebissonii
Cosmarium
pachydermum
Micrasterias
thomasiana
var.
notata
Euastrum
ansatum
Staurastrum
forficulatum
var.
verrucosum
Cosmarium
neodepressum
Xanthidium
armatum
Euastrum
oblongum
Cosmarium
porteanum
Micrasterias
truncata
Euastrum
rhomboidale
Staurastrum
furcatum
Xanthidium
uncinatum
Hyalotheca
dissiliens
Cosmarium
pseudonitidulum
var.
validum
Micrasterias
truncata
var.
bahusiensis
Euastrum
bidentatum
Staurastrum
hirsutum
Actinotaenium
cucurbitinum
Hyalotheca
minor
Cosmarium
pyramidatum
Micrasterias
truncata
var.
quadrata
Euastrum
binale
var.
gutwinskii
Staurastrum
inconspicuum
Bambusina
borreri
Micrasterias
americana
Cosmarium
quadratulum
Pleurotaenium
trabecula
var.
elongatum
Euastrum
coeseli
Staurastrum
margaritacaeum
Cosmarium
bicuneatum
Micrasterias
apiculata
Cosmarium
simplicius
Pleurotaenium
crenulatum
Euastrum
crassum
Staurastrum
simonyi
var.
sparsiaculeatum
Cosmarium
caelatum
Micrasterias
crux-melitensis
Cosmarium
sparsepunctatum
Pleurotaenium
ehrenbergii
Euastrum
didelta
Staurastrum
spongiosum
var.
perbifidum
Cosmarium
connatum
Micrasterias
denticulata
Cosmarium
subarctoum
Pleurotaenium
trabecula
var.
trabecula
Euastrum
humerosum
Staurastrum
teliferum
Staurodesmus
dejectus
Pandorina
spec.
Cosmarium
conspersum
Lemmermannia
komarekii
Micrasterias
papillifera
Trebouxia
arboricola
Cosmarium
venustum
var.
excavatum
Eremosphaera
viridis
Spondylosium
pulchellum
Goniochloris
tripus
Tetmemorus
granulatus
var.
granulatus
Desmodesmus
subspicatus
Euastrum
humerosum
var.
affine
Glaucocystis
nostochinearum
Staurodesmus
convergens
Raphidocelis
arcuata
Cosmarium
integrum
Volvox
aureus
Micrasterias
rotata
Crucigeniella
lunaris
Desmidium
grevillei
Dimorphococcus
lunatus
Staurastrum
alternans
Microspora
irregularis
Tetmemorus
laevis
var.
laevis
Dictyosphaerium
ehrenbergianum
Euastrum
luetkemuelleri
var.
carniolicum
Hydrodictyon
reticulatum
Stauridium
tetras
Pseudostaurastrum
limneticum
Eremosphaera
viridis
cystozygote
Hindakia
tetrachotoma
Monactinus
simplex
var.
sturmii
Parapediastrum
biradiatum
Coelastrum
microporum
var.
octaedricum
Pediastrum
braunii
Chlamydomonas
reinhardtii
Micractinium
pusillum
Haematococcus
lacustris
Octactis
speculum
Ceramium
diaphanum