A Guide to Selected Genera of the British Desmids

Click on genus name for description.
Scale information is given below each image as equivalent width of the image in µm.

Genus Euastrum
Euastrum insigne

85 µm
Euastrum humerosum

109 µm
Euastrum bidentatum

49 µm

Genus Micrasterias
Micrasterias jenneri

152 µm
Micrasterias denticulata

243 µm
Micrasterias crux-melitensis

121 µm

Genus Cosmarium
Cosmarium obtusatum

64 µm
Cosmarium botrytis

78 µm
Cosmarium depressum

57 µm

Genus Staurastrum
Staurastrum sexangulare var. supernumerarium

116 µm
Staurastrum paradoxum var. cingulum

91 µm
Staurastrum gladiosum


54 µm

Genus Xanthidium
Xanthidium subhastiferum

95 µm
Xanthidium antilopeum

99 µm
Xanthidium cristatum

85 µm

Genus Staurodesmus
Staurodesmus controversus

37 µm
Staurodesmus bulnheimii

69 µm
Staurodesmus incus

36 µm

Genus Tetmemorus
Tetmemorus brebissonii

232 µm
Tetmemorus granulatus

198 µm

Genus Closterium
Closterium setaceum

345 µm
Closterium costatum

444 µm
Closterium lunula

695 µm

Genus Penium
Penium margaritaceum

156 µm
Penium cucurbitinum

82 µm

Genus Gonatozygon
Gonatozygon monotaenium

326 µm
Gonatozygon brebissonii

132 µm
Gonatozygon kinahani

177 µm

Genus Pleurotaenium
Pleurotaenium trabecula

250 µm
Pleurotaenium tridentulum

96 µm

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