Desmidiales (Desmidiaceae, Zygnematophyceae) from lowland rivers and floodplain lakes of Ecuadorian Amazonia Author SÁNCHEZ, Luzmila Laboratorio de Zoología y Ecología Acuática-LAZOEA, Universidad de los Andes, Cra. 1 # 18 A- 12, Bogotá 111711 (Colombia) Author SÁNCHEZ, Fernando R. Grupo de Investigación en Biodiversidad, Medio Ambiente, y Salud (BIOMAS), Universidad de Las Américas (UDLA), Vía a Nayón, Quito 170124 (Ecuador) Author RÍOS-TOUMA, Blanca Grupo de Investigación en Biodiversidad, Medio Ambiente, y Salud (BIOMAS), Universidad de Las Américas (UDLA), Vía a Nayón, Quito 170124 (Ecuador) & Global Research & Solutions Center, Colegio de Ciencias Biológicas y Ambientales (COCIBA), Universidad San Francisco de Quito, Diego de Robles S / N y Pampite, Quito 170901 (Ecuador) Author José V. MONTOYA Grupo de Investigación en Biodiversidad, Medio Ambiente, y Salud (BIOMAS), Universidad de Las Américas (UDLA), Vía a Nayón, Quito 170124 (Ecuador) & Laboratorio de Ecología Acuática, Centro de Ecología, Instituto Venezolano de Investigaciones Científicas (IVIC), Carretera Panamericana Km 11, Caracas 1020 - A (Venezuela) jose.v.montoya@gmail.com text Cryptogamie, Algologie 2025 2025-09-05 46 3 31 60 https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2025v46a3.pdf journal article 10.5252/cryptogamie-algologie2025v46a3 16d07be2-776d-4f8d-99bb-1c47d15353c4 1776-0984 17108984

TABLE 1. — Sampling sites for desmids during the high water (Aug 2021) and rising water (Apr 2022) hydrological phases. 1, the tributary or river to which lakes are connected (parent river) is indicated within brackets; 2, latitude (Lat.) and Longitude (Long.) are expressed in decimal degrees; 3, sites sampled only during the rising water hydrological phase. Abbreviations: CL, Canangüeno Lake; CR, Cuyabeno River; DL, Delfincocha Lake; GL, Grande Lake; LR, Lagartococha River; PL, Pilchicocha Lake; PR, Pacuya River; and ZL, Zancudococha Lake.

Site Name 1	Site code	Lat. Long. 2 Alt. (m)	Site description
Pilchicocha Lake (Napo River)	PL	–0.47311 –76.45954 230	Pilchicocha Lake lies on the left bank of the Napo River, downstream Puerto Providencia. The lake is connected to the river via a short channel. Lake micro basin is in the alluvial floodplain of the Napo River, in protected private lands.Although of being a lake associated with a whitewater river, its waters are dominated by the influx of several small blackwater creeks draining the forest.
Grande Lake (Cuyabeno River)	GL	–0.00423 –76.18261 221	Grande Lake belongs to the Cuyabeno wetlands system, and it is connected to other lakes through channels. It is a blackwater lake. There are several lodges for tourism along the margin of the lake and the presence of motorboats is common. This lake usually dries up during the dry season.
Canangüeno Lake3 (Cuyabeno River)	CL	–0.04294 –76.19932 220	Canangüeno Lake belongs to the Cuyabeno wetlands system. This blackwater lake is connected to Grande Lake through channels. The access to this lake is granted only for authorized research activities and for indigenous people inhabiting the area. This lake often dries up during the dry season.
Delfincocha Lake (Lagartococha River)	DL	–0.59448 –75.24351 196	Delfincocha Lake is a blackwater lake in the Lagartococha wetlands, on the right bank of the Lagartococha River. It is a permanently connected lake.
Zancudococha Lake3 (Aguarico River)	ZL	–0.58954 –75.48291 185	Zancudococha Lake is on the right bank of the Aguarico River, connected to it through a narrow channel. It is the largest lake in the Ecuadorian Amazonia in terms of area. Although of being a lake associated with a whitewater river, its waters are dominated by the influx of several small blackwater creeks draining the forest.
Cuyabeno River	CR	–0.00618 –76.17212 211	Cuyabeno River is a left margin tributary of the Aguarico River. It is a narrow and meandering blackwater river that forms a complex wetland system in its middle stretches. Its headwaters are in the Andean mountains and before entering its protected area, it drains lands subjected to land use changes in the last decades.
Lagartococha River	LR	–0.59750 –75.23869 196	Lagartococha River is a left margin tributary of the Aguarico River. It is a blackwater river, draining a conserved and remote area of the Ecuadorian Amazonia. It is in a natural protected area and constitutes the borderline between Ecuador and Peru.
Pacuya River3	PR	-0.53694 -75.57043 197	Pacuya River is a right margin, blackwater tributary of the Aguarico River. Its basin is very well conserved, usually used by Cofan indigenous people as one of their main places to gather food, especially fish.