Desmids –
Archaeplastida (Part)
Observations on Closterium costatum
Gallery Prof. Rupert Lenzenweger
Protisten / Home / Algae green-colored (2: Desmids): Streptophyta / Zygnematophyceae / Zygnematophycidae / Desmidiales / Closteriaceae / Closterium costatum – Prof. R. Lenzenweger
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Closterium costatum Corda ex Ralfs 1848
Most likely ID: n.a.
Basionym: n.a.
Add’l Synonyms: Closterium crassestriatum W.Archer 1879
Arthrodia costata (Ralfs) Kuntze 1891
Closterium varzinense J.Sampaio 1922
Closterium costatum var. multinucleatum Deflandre 1925
Closterium costatum f. sigmoideum Corillion ????


Description: The cells are (6)–7–10–(11) times longer than they are wide, straight in the middle segment, slightly curved towards the cell ends. These are broadly rounded and have a cap-like shape due to a bulging wall thickening, end vacuoles with several crystals. The cell wall has belt bands and clear, wide-set ribs. Both the different shape of the cell ends and the cell wall structure are the main distinguishing features from the morphologically very similar Closterium striolatum.
Dimension: Length (200)–250–400–(550) µm, width (25)–30–45–(60) µm.
Occurrence: Similar to Closterium striolatum, it is widespread in wet meadows, fens, and shore areas of lakes and ponds.
Left: Original graphic by Prof. Lenzenweger.
Right: Photomicrograph by Prof. Lenzenweger. For microphotography, the microscope illumination was adjusted in such a way that as many features as possible that are important for species identification are prominently displayed.
Copyright by Prof. Rupert Lenzenweger, Ried im Innkreis, Austria.

Characteristic data for the curvature according to Coesel & Meesters 2023
Curvature class: “(very) slightly curved” but not straight
Curvature index: 0.050–0.268
© 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
crassa
digitus
var. lamellosum
digitus
var. latum
oblongum
interruptum
spec.
spec.
kinahanii
spec.
polymorphum
var. polymorphum
spec.
spirostriolatum
digitus
brebissonii
rotata
swartzii
capitulum
antilopaeum
neosinuosum
brebissonii
pachydermum
thomasiana
var. notata
ansatum
forficulatum
var. verrucosum
neodepressum
armatum
oblongum
porteanum
truncata
rhomboidale
furcatum
uncinatum
dissiliens
pseudonitidulum
var. validum
truncata
var. bahusiensis
bidentatum
hirsutum
cucurbitinum
minor
pyramidatum
truncata
var. quadrata
binale
var. gutwinskii
inconspicuum
borreri
americana
quadratulum
trabecula
var. elongatum
coeseli
margaritacaeum
bicuneatum
apiculata
simplicius
crenulatum
crassum
simonyi
var. sparsiaculeatum
caelatum
crux-melitensis
sparsepunctatum
ehrenbergii
didelta
spongiosum
var. perbifidum
connatum
denticulata
subarctoum
trabecula
var. trabecula
humerosum
teliferum
dejectus
spec.
conspersum
komarekii
papillifera
arboricola
venustum
var. excavatum
viridis
pulchellum
tripus
granulatus
var. granulatus
subspicatus
humerosum
var. affine
nostochinearum
convergens
arcuata
integrum
aureus
rotata
lunaris
grevillei
lunatus
alternans
irregularis
laevis
var. laevis
ehrenbergianum
luetkemuelleri
var. carniolicum
reticulatum
tetras
limneticum
viridis
cystozygote
tetrachotoma
simplex
var. sturmii
biradiatum
microporum
var. octaedricum
braunii
reinhardtii
pusillum
lacustris
speculum
diaphanum
New items
crassa
digitus
var. lamellosum
digitus
var. latum
oblongum
interruptum
spec.
spec.
kinahanii
spec.
polymorphum
var. polymorphum
spec.
spirostriolatum
digitus
brebissonii
rotata
swartzii
capitulum
antilopaeum
neosinuosum
brebissonii
pachydermum
thomasiana
var. notata
ansatum
forficulatum
var. verrucosum
neodepressum
armatum
oblongum
porteanum
truncata
rhomboidale
furcatum
uncinatum
dissiliens
pseudonitidulum
var. validum
truncata
var. bahusiensis
bidentatum
hirsutum
cucurbitinum
minor
pyramidatum
truncata
var. quadrata
binale
var. gutwinskii
inconspicuum
borreri
americana
quadratulum
trabecula
var. elongatum
coeseli
margaritacaeum
bicuneatum
apiculata
simplicius
crenulatum
crassum
simonyi
var. sparsiaculeatum
caelatum
crux-melitensis
sparsepunctatum
ehrenbergii
didelta
spongiosum
var. perbifidum
connatum
denticulata
subarctoum
trabecula
var. trabecula
humerosum
teliferum
dejectus
spec.
conspersum
komarekii
papillifera
arboricola
venustum
var. excavatum
viridis
pulchellum
tripus
granulatus
var. granulatus
subspicatus
humerosum
var. affine
nostochinearum
convergens
arcuata
integrum
aureus
rotata
lunaris
grevillei
lunatus
alternans
irregularis
laevis
var. laevis
ehrenbergianum
luetkemuelleri
var. carniolicum
reticulatum
tetras
limneticum
viridis
cystozygote
tetrachotoma
simplex
var. sturmii
biradiatum
microporum
var. octaedricum
braunii
reinhardtii
pusillum
lacustris
speculum
diaphanum