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Tiny Organisms in Aquatic Habitats
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Golden-brownish-
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Green-colored
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Algae (2):
Desmids sensu lato
Reddish-colored
Algae
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Amoeboid Protists
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Naked Amoebae
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Colored Flagellates
Colorless Flagellates
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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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Table of Contents
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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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Close
Usage Hints
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Diatoms – SAR-Stramenopiles (Bacillariophyta)
All Items
Bacillariophyceae
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Achnanthes armillaris
Amphora ovalis
Cocconeis
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Cocconeis
spec.
Cocconeis pediculus
Cocconeis placentula
var.
euglypta
Cocconeis scutellum
Entomoneis
Close
Entomoneis alata
Entomoneis paludosa
Epithemia
Close
Epithemia adnata
Epithemia gibba
Epithemia turgida
Eunotia arcus
Bacillariales
Close
Bacillaria paxillifera
Cylindrotheca closterium
Nitzschia
Close
Nitzschia gracilis
Nitzschia hybrida
Nitzschia sigmoidea
Pseudo-nitzschia
Close
Pseudo‑nitzschia delicatissima
Pseudo‑nitzschia pungens
Cymbellales
Close
Cymbella
spec.
Gomphonema
Close
Gomphonema
spec.
Gomphonema micropus
Placoneis elginensis
Rhoicosphenia abbreviata
Naviculales
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Caloneis amphisbaena
Gyrosigma
Close
Gyrosigma acuminatum
Gyrosigma fasciola
Navicula
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Naviula
spec.
Navicula oblonga
Pinnularia
Close
Pinnularia viridiformis
Pinnularia viridis
Plagiotropis gibberula
Surirellales
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Campylodiscus
spec.
Iconella
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Iconella elegans
Iconella linearis
Coscinodiscophyceae
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Ellerbeckia
spec.
Melosira
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Melosira inflexa
Melosira varians
Chaetocerotales
Close
Acanthoceras zachariasii
Attheya
Close
Attheya septentrionalis
Attheya longicornis
Chaetoceros
Close
Chaetoceros borealis
Chaetoceros brevis
Chaetoceros curvisetus
Chaetoceros danicus
Chaetoceros debilis
Chaetoceros decipiens
Chaetoceros densus
Chaetoceros diadema
Chaetoceros didymus
Chaetoceros eibenii
Chaetoceros similis
Chaetoceros simplex
Chaetoceros tortissimus
Aulacoseira
Close
Aulacoseira
spec.
Aulacoseira granulata
Coscinodiscales
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Actinoptychus senarius
Coscinodiscus
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Coscinodiscus
spec.
Coscinodiscus concinnus
Coscinodiscus radiatus
Coscinodiscus wailesii
Rhizosoleniales
Close
Dactyliosolen fragilissimus
Guinardia
Close
Guinardia delicatula
Guinardia flaccida
Proboscia
Close
Proboscia
spec.
Proboscia alata
Pseudosolenia calcar-avis
Sundstroemia setigera
Thalassiosirales
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Skeletonemataceae
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Skeletonema
Close
Skeletonema
spec.
Skeletonema costatum
Stephanodiscaceae
Close
Cyclostephanos novae-zeelandiae
Cyclotella
spec.
Pantocsekiella kuetzingiana
Stephanodiscus
spec.
Thalassiosiraceae
Close
Porosira glacialis
Thalassiosira
Close
Thalassiosira
spec.
Thalassiosira angulata
Thalassiosira angustelineata
Thalassiosira eccentrica
Thalassiosira gravida
Thalassiosira leptopus
Thalassiosira lundiana
Thalassiosira nordenskioeldii
Thalassiosira punctigera
Fragilariophyceae
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Fragilariales
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Asterionella
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Asterionella formosa
Asterionella tekelili
Asterionellopsis glacialis
Centronella reicheltii
Diatoma vulgaris
Fragilaria
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Fragilaria islandica
Fragilaria lemanensis
Meridion circulare
Rhabdonema arcuatum
Licmophorales
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Licmophora
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Licmophora spec.
Licmophora juergensii
Licmophora oedipus
Ulnaria ulna
Tabellariales
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Tabellaria fenestrata
Thalassionemales
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Thalassionema nitzschioides
Mediophyceae
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Hemiaulales
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Cerataulina pelagica
Eucampia zodiacus
Lithodesmiales
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Ditylum brightwellii
Triceratiales
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Cerataulus granulatus
Trieres
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Trieres chinensis
Trieres mobiliensis
Mediopyxis helysia
Odontella aurita
Zygoceros ehrenbergii
Menu
All Items
Bacillariophyceae
Achnanthes armillaris
Amphora ovalis
Cocconeis
Cocconeis
spec.
Cocconeis pediculus
Cocconeis placentula
var.
euglypta
Cocconeis scutellum
Entomoneis
Entomoneis alata
Entomoneis paludosa
Epithemia
Epithemia adnata
Epithemia gibba
Epithemia turgida
Eunotia arcus
Bacillariales
Bacillaria paxillifera
Cylindrotheca closterium
Nitzschia
Nitzschia gracilis
Nitzschia hybrida
Nitzschia sigmoidea
Pseudo-nitzschia
Pseudo‑nitzschia delicatissima
Pseudo‑nitzschia pungens
Cymbellales
Cymbella
spec.
Gomphonema
Gomphonema
spec.
Gomphonema micropus
Placoneis elginensis
Rhoicosphenia abbreviata
Naviculales
Caloneis amphisbaena
Gyrosigma
Gyrosigma acuminatum
Gyrosigma fasciola
Navicula
Naviula
spec.
Navicula oblonga
Pinnularia
Pinnularia viridiformis
Pinnularia viridis
Plagiotropis gibberula
Surirellales
Campylodiscus
spec.
Iconella
Iconella elegans
Iconella linearis
Coscinodiscophyceae
Ellerbeckia
spec.
Melosira
Melosira inflexa
Melosira varians
Chaetocerotales
Acanthoceras zachariasii
Attheya
Attheya septentrionalis
Attheya longicornis
Chaetoceros
Chaetoceros borealis
Chaetoceros brevis
Chaetoceros curvisetus
Chaetoceros danicus
Chaetoceros debilis
Chaetoceros decipiens
Chaetoceros densus
Chaetoceros diadema
Chaetoceros didymus
Chaetoceros eibenii
Chaetoceros similis
Chaetoceros simplex
Chaetoceros tortissimus
Aulacoseira
Aulacoseira
spec.
Aulacoseira granulata
Coscinodiscales
Actinoptychus senarius
Coscinodiscus
Coscinodiscus
spec.
Coscinodiscus concinnus
Coscinodiscus radiatus
Coscinodiscus wailesii
Rhizosoleniales
Dactyliosolen fragilissimus
Guinardia
Guinardia delicatula
Guinardia flaccida
Proboscia
Proboscia
spec.
Proboscia alata
Pseudosolenia calcar-avis
Sundstroemia setigera
Thalassiosirales
Skeletonemataceae
Skeletonema
Skeletonema
spec.
Skeletonema costatum
Stephanodiscaceae
Cyclostephanos novae-zeelandiae
Cyclotella
spec.
Pantocsekiella kuetzingiana
Stephanodiscus
spec.
Thalassiosiraceae
Porosira glacialis
Thalassiosira
Thalassiosira
spec.
Thalassiosira angulata
Thalassiosira angustelineata
Thalassiosira eccentrica
Thalassiosira gravida
Thalassiosira leptopus
Thalassiosira lundiana
Thalassiosira nordenskioeldii
Thalassiosira punctigera
Fragilariophyceae
Fragilariales
Asterionella
Asterionella formosa
Asterionella tekelili
Asterionellopsis glacialis
Centronella reicheltii
Diatoma vulgaris
Fragilaria
Fragilaria islandica
Fragilaria lemanensis
Meridion circulare
Rhabdonema arcuatum
Licmophorales
Licmophora
Licmophora spec.
Licmophora juergensii
Licmophora oedipus
Ulnaria ulna
Tabellariales
Tabellaria fenestrata
Thalassionemales
Thalassionema nitzschioides
Mediophyceae
Hemiaulales
Cerataulina pelagica
Eucampia zodiacus
Lithodesmiales
Ditylum brightwellii
Triceratiales
Cerataulus granulatus
Trieres
Trieres chinensis
Trieres mobiliensis
Mediopyxis helysia
Odontella aurita
Zygoceros ehrenbergii
Illustrated Key for
Diatoms – SAR-Stramenopiles (Bacillariophyta)
Fragilariophyceae
Asterionella
formosa
Asterionella
tekelili
Asterionellopsis
glacialis
Centronella
reicheltii
Diatoma
vulgaris
Fragilaria
islandica
Fragilaria
lemanensis
Meridion
circulare
Rhabdonema
arcuatum
Rhabdonema
arcuatum
Licmophora
spec.
Licmophora
juergensii
Licmophora
oedipus
Ulnaria
ulna
Tabellaria
fenestrata
Tabellaria
fenestrata
Thalassionema
nitzschioides
Asterionella
formosa
Asterionella
tekelili
Asterionellopsis
glacialis
Centronella
reicheltii
Diatoma
vulgaris
Fragilaria
islandica
Fragilaria
lemanensis
Meridion
circulare
Rhabdonema
arcuatum
Rhabdonema
arcuatum
Licmophora
spec.
Licmophora
juergensii
Licmophora
oedipus
Ulnaria
ulna
Tabellaria
fenestrata
Tabellaria
fenestrata
Thalassionema
nitzschioides
© 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