Pleurotaenium nodosum (Bailey ex Ralfs) P.Lundell

SÁNCHEZ, Luzmila, SÁNCHEZ, Fernando R., RÍOS-TOUMA, Blanca & José V. MONTOYA, 2025, Desmidiales (Desmidiaceae, Zygnematophyceae) from lowland rivers and floodplain lakes of Ecuadorian Amazonia, Cryptogamie, Algologie 20 (3), pp. 31-60 : 50

publication ID	https://doi.org/10.5252/cryptogamie-algologie2025v46a3
DOI	https://doi.org/10.5281/zenodo.17109033
persistent identifier	https://treatment.plazi.org/id/C7390B66-FFEA-9124-AFA4-F93E0A7FFE0D
treatment provided by	Plazi
scientific name	Pleurotaenium nodosum (Bailey ex Ralfs) P.Lundell
status

Treatment

( Fig. 6E View FIG )

Nova Acta Regiae Societatis Scientiarum Upsaliensis, serie 3, 8 (2): 90 ( Lundell 1871). — Docidium nodosum Bailey ex Ralfs , The British Desmidieae: 218 ( Ralfs 1848).

DISTRIBUTION. — Cosmopolitan. Amazon Basin: Grönblad (1945); Gutiérrez & Cadima (2004); Cadima (2013). Western Amazonia (lowlands): Montoya (1974).

DESCRIPTION

Cells 400.0-427.3 µm long, 66.0-68.5 µm wide; isthmus 31.0-34.0 µm; apex: 32.0-33.1 µm; cells are 6-7 times longer than wide. Cells solitary, dark brown cell wall, with a deep constriction dividing the cell into two semicells, each with four inflates or bulges gradually tapering from base to tip; apices dilated, convex truncated, with a crown of eight conical teeth.

Kingdom	Plantae
Phylum	Charophyta
Class	Conjugatophyceae
Order	Zygnematales
Family	Desmidiaceae
Genus	Pleurotaenium