Desmids

24 February 2026

• Stauratrum vestitum var. subanatinum

22 February 2026

• Closterium venus

18 February 2026

• Staurastrum brasiliense var. lundellii
• Staurastrum lagerheimii

14 February 2026

• Cosmarium contractum Morpha 1
• Cosmarium contractum Morpha 2

31 January 2026

• Staurodesmus cuspidatus var. divergens

22 January 2026

• Cosmarium pseudobiremiforme
• Xanthidium controversum var. planctonicum

15 January 2026

• Cosmarium beanlandii
• Cosmarium turpinioides

11 January 2026

• Cosmarium kinhemense
• Cosmarium trachypleuroides

5 January 2026

• Cosmarium arvidsjaurense
• Cosmarium desectum
• Cosmarium joostenii
• Cosmarium pseudosuborthogonum
• Cosmarium pyramidale
• Cosmarium septentrionaliforme

3 January 2026

• Cosmarium subcucumiforme
• Cosmarium subcucumoides

1 January 2026

• Cosmarium ausseeanum
• Cosmarium papillatum
• Cosmarium subadoxiforme

30 December 2025

• Cosmarium leursii

26 December 2025

• Cosmarium venustulum

20 December 2025

• Cosmarium fictopyramidatum

19 December 2025

• Cosmarium druimnahimrichense

15 December 2025

• Cosmarium heimerlii
• Cosmarium sphagnicoliforme
• Cosmarium subcoliferum

13 December 2025

• Cosmarium elevatiforme
• Cosmarium elevatum

9 December 2025

• Cosmarium laeviforme
• Cosmarium submeneghinii

7 December 2025

• Cosmarium pseudovalidius
• Cosmarium subspeciosiforme

3 December 2025

• Cosmarium basiornatum

2 December 2025

• Cosmarium davidsonii

25 November 2025

• Cosmarium confusopraemorsum
• Cosmarium owencashlaense
• Cosmarium pseudodentiferum
• Cosmarium pseudogaleritum
• Cosmarium vexatiforme

21 November 2025

• Cosmarium jemtlandicoides
• Cosmarium neocosandeyi
• Cosmarium pseudotroumousense
• Cosmarium troumousense

18 November 2025

• Euastrum turneri

17 November 2025

• Cosmarium boreoquadratum
• Cosmarium porteaniforme
• Cosmarium pseudoquadratum
• Cosmarium pseudowillei
• Cosmarium quadratiforme

14 November 2025

• Cosmarium anisochondroides
• Cosmarium citriforme
• Cosmarium fabiforme
• Cosmarium mitriforme
• Cosmarium neoregnellii
• Cosmarium parviregnellii

9 November 2025

• Cosmarium incommodum
• Cosmarium perdepressum
• Cosmarium pseudomelanosporum
• Cosmarium pseudosphagnicola

30 October 2025

• Cosmarium esclauzense
• Cosmarium multiconfusum

24 October 2025

• Cosmarium cerdagnense
• Cosmarium subcostatiforme

17 October 2025

• Cosmarium clepsydra morpha
• Cosmarium impressuliforme
• Cosmarium neocrenulatum

1 October 2025

• Cosmarium groenlandicum
• Cosmarium pseudosaxicola

24 September 2025

• Cosmarium contractum var. subglobosum
• Cosmarium perdifficile

23 September 2025

• Cosmarium contractum sensu W & G.S. West 1905
• Cosmarium pseudotumidum
• Staurodesmus bulnheimii

18 September 2025

• Staurastrum elongatum
• Staurastrum longipes var. contractum
• Staurastrum muticum morpha

12 September 2025

• Cosmarium carniolicum
• Cosmarium extensum
• Cosmarium pyramidatiforme

9 September 2025

• Actinotaenium obcuneatum
• Cosmarium anisochondroides
• Cosmarium sparsipunctatum
• Haplotaenium latius

20 August 2025

• Cosmarium botrytis var. tumidium
• Cosmarium dubovianum

13 August 2025

• Cosmarium cantalanse
• Cosmarium isthmium
• Cosmarium swieri
• Cosmarium volcanicum

11 August 2025

• Cosmarium lamouraense
• Cosmarium pseudannulatum
• Cosmarium subbioculatum

10 August 2025

• Cosmarium fictogermanicum
• Cosmarium paragranatoides

8 August 2025

• Cosmarium ridibundum
• Cosmarium schulzii

2 August 2025

• Closterium nematodes var. proboscideum
• Closterium regulare
• Euastrum gemmatum

1 August 2025

• Closterium limneticum var. tenue
• Closterium subscoticum morpha
• Cosmarium fictophaseolus
• Cosmarium tetraophthalmoides
• Staurastrum subnivale

28 July 2025

• Cosmarium alteroreniforme
• Cosmarium bioculatiforme
• Cosmarium kossinskajae
• Cosmarium paludis-veteris
• Cosmarium pseudoklebsii
• Cosmarium subabbreviatum

27 July 2025

• Closterium juncidum var. brevius

18 July 2025

• Staurastrum gladiosum

12 July 2025

• Gonatozygon brebissonii var. minutum

28 June 2025

• Euastrum lacustre
• Staurastrum pelagicum
• Staurastrum planctonicum

24 June 2025

• Staurastrum boreale morpha
• Staurastrum crenulatum
• Staurastrum manfeldtii var. annulatum
• Staurastrum manfeldtii var. parvum

15 June 2025

• Closterium abruptum var. brevius
• Cosmarium arcuatiporosum
• Mesotaenium kramstae

9 June 2025

• Roya obtusa var. montana

26 April 2025

• Cosmarium corbula

18 April 2025

• Actinotaenium cruciferum
• Closterium cornu

9 April 2025

• Euastrum montanum
• Staurastrum margaritaceum morpha
• Staurodesmus glaber var. limnophilus

2 April 2025

• Closterium baillyanum var. parvulum

22 March 2025

• Cosmarium dentiferum var. alpinum
• Cosmarium margaritatum var. ridibundum
• Cosmarium reniforme var. compressum

11 March 2025

• Cosmarium sphalerostichum

2 March 2025

• Cosmarium magnum

25 February 2025

• Cosmarium granatum var. messikommeri
• Cosmarium granatum var. nordstedtii

22 February 2025

• Cosmarium integrum

20 February 2025

• Cosmarium scenedesmus

12 February 2025

• Cosmarium minutum
• Cosmarium subnudum
• Cosmarium contractoideum
• Cosmarium ellipsoideum
• Cosmarium pseudogoniodes
• Cosmarium subcostatulum
• Cosmarium triomphalum

2 February 2025

• Pleurotaenium pseudofluctuatum