Closterium

Currently one group is ready.

Closterium with parallel central part of cell, straight – PVIK
Cell nearly straight, only curved at ends, central part parallel, width < 25 µm, no true girdle bands.

Species in PVIK:
Closterium aciculare
Closterium delpontei
Closterium gracile var. elongatum
Closterium gracile var. gracile
Closterium gracile var. lundellii
Closterium gracile var. striolatum
Closterium limneticum var. fallax
Closterium limneticum var. limneticum
Closterium limneticum var. tenue
Closterium lineatum var. elongatum
Closterium lineatum var. lineatum
Closterium nordstedtii
Closterium nordstedtii var. polystictum
Closterium praelongum var. brevius
Closterium praelongum var. praelongum
Closterium strigosum var. elegans
Closterium strigosum var. strigosum
Closterium subscotium
Closterium toxon

Literature used for the key:
Coesel, Peter F.M. & Meesters, Koos (J.) 2007. Desmids of the Lowlands. Mesotaeniaceae and Desmidiaceae of the European Lowlands. KNNV, Zeist. 351 p.
Coesel, Peter F.M. & Meesters, Koos (J.) 2023. Desmids of the Lowlands. 2nd revised and extended edition. KNNV, Zeist. 424 p.
Lenzenweger, Rupert 1996. Desmidiaceenflora von Österreich. Teil 1. Bibliotheca Phycologica, Band 101. J. Cramer.162 s.
Ruzicka, J., 1977. Die Desmidiaceen Mitteleuropas. Band 1, Lief. 1. – E.Schweizerbart, Stuttgart