Desmidiales (Desmidiaceae, Zygnematophyceae) from lowland rivers and floodplain lakes of Ecuadorian Amazonia

This dataset contains the digitized treatments in Plazi based on the original journal article 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 46 (3): 31-60, DOI: 10.5252/cryptogamie-algologie2025v46a3, URL: sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2025v46a3.pdf ABSTRACT We present the results of a taxonomic survey of desmidiales (Desmidiaceae Ralfs, Zygnematophyceae Round ex Guiry) in floodplain lakes and tributaries of the Napo-Aguarico River in the Ecuadorian Amazon.

Surface water samples were collected for taxonomic analysis at each site during two different hydrological periods in 2021 and 2022. Our sites share a typical blackwater typology, with high water transparency, low conductivity, acidic, and soft waters. In this study we documented 42 specific or infraspecific taxa in 10 genera within the Desmidiaceae family: Bambusina Kützing ex Kützing (1), Cosmarium Corda ex Ralfs (9), Desmidium C.Agardh ex Ralfs (3), Euastrum Ehrenberg ex Ralfs (3), Hyalotheca Ehrenberg ex Ralfs (2), Micrasterias C.Agardh ex Ralfs (12), Pleurotaenium Nägeli (2), Staurastrum Meyen ex Ralfs (6), Staurodesmus Teiling (2), and Xanthidium Ehrenberg ex Ralfs (2).