Desmids –
Archaeplastida (Part)
Observations on Closterium costatum
Gallery Prof. Rupert 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.
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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
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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
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coeseli
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crassum
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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
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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